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During exercise, the demand for oxygen in the working muscles increases significantly. To meet this demand, the active muscles extract more oxygen from the arterial blood. Consequently, the oxygen content of the venous blood returning to the heart decreases, while the arterial oxygen content remains relatively constant. This leads to an increase in the difference between arterial and venous oxygen content (\(a\text{-}\bar{v}\text{O}_2\text{ diff}\)).

Award 1 mark for the correct answer (C). No partial marks are given for incorrect choices.

During the descent phase of a squat, the quadriceps femoris muscle group is lengthening while actively contracting to control the rate of descent against gravity. This is defined as an eccentric contraction.

Award 1 mark for the correct answer (C). No partial marks are given for incorrect choices.

According to the principle of conservation of angular momentum, angular momentum (\(L\)) remains constant when no external torque acts on the system. Angular momentum is the product of moment of inertia (\(I\)) and angular velocity (\(\omega\)), represented as \(L = I\omega\). Since moment of inertia is proportional to the mass distribution and the square of the radius (\(I = mr^2\)), pulling the body closer to the bar decreases the radius of rotation, which decreases the moment of inertia. To conserve angular momentum, the angular velocity must increase.

Award 1 mark for the correct answer (B). No partial marks are given for incorrect choices.

Massed practice involves continuous practice with little to no rest intervals between trials. Blocked practice involves repeatedly practicing a single skill/task before moving on to another. Since the players shoot 50 free throws consecutively without breaks or other tasks, it is classified as massed and blocked practice.

Award 1 mark for the correct answer (D). No partial marks are given for incorrect choices.

Dietary carbohydrates are stored as muscle and liver glycogen. During prolonged endurance exercise, muscle glycogen serves as a critical, easily accessible substrate for both anaerobic glycolysis and aerobic metabolism to regenerate adenosine triphosphate (ATP) for muscle contraction.

Award 1 mark for the correct answer (B). No partial marks are given for incorrect choices.

Drive theory proposes a linear relationship between arousal and performance (represented as \(P = f(H \times D)\), where \(H\) is habit strength and \(D\) is drive/arousal). For highly skilled athletes performing a well-learned task, their dominant response is typically correct. Therefore, as arousal increases, the probability of executing the correct dominant response increases, leading to a linear increase in performance.

Award 1 mark for the correct answer (A). No partial marks are given for incorrect choices.

The immediate rise in heart rate at the onset of exercise (up to approximately 100 beats per minute) is primarily mediated by the withdrawal of parasympathetic (vagal) nerve activity. Subsequent increases beyond this rate are driven by the activation of the sympathetic nervous system and circulating catecholamines.

Award 1 mark for the correct answer (A). No partial marks are given for incorrect choices.

Increased dynamic knee valgus (where the knee collapses inward, involving hip adduction, knee abduction, and tibial rotation) places significant strain on the ACL. This biomechanical pattern is a primary risk factor for non-contact ACL injuries during landing and cutting maneuvers.

Award 1 mark for the correct answer (C). No partial marks are given for incorrect choices.

During exercise, the sympathetic nervous system is activated, which causes vasoconstriction in non-essential organs like the kidneys and the gastrointestinal tract. Simultaneously, local metabolic factors override this sympathetic vasoconstriction in active skeletal muscles, leading to localized vasodilation. This dual mechanism ensures that cardiac output is redistributed towards the working muscles.

[1 mark] Award 1 mark for identifying that vasodilation of arterioles in skeletal muscle and vasoconstriction of arterioles in the kidneys/GI tract is the correct physiological mechanism. No partial marks.

In a third-class lever, the effort force is positioned between the fulcrum and the load. This arrangement means the effort arm is always shorter than the load arm, creating a mechanical disadvantage for force (force output is less than force input). However, it provides a major advantage in terms of increased range of motion and increased speed of the load movement.

[1 mark] Award 1 mark for the correct description of the structural arrangement of a third-class lever and its associated mechanical advantage/disadvantage.

Using the equations of constant acceleration (SUVAT): \(v^2 = u^2 + 2as\). At the peak of the jump, vertical velocity \(v = 0\text{ m s}^{-1}\). The initial velocity \(u = 4.9\text{ m s}^{-1}\) and acceleration due to gravity \(a = -9.8\text{ m s}^{-2}\). Substituting the values: \(0 = (4.9)^2 + 2(-9.8)s\) which simplifies to \(0 = 24.01 - 19.6s\). Solving for \(s\): \(s = 24.01 / 19.6 = 1.225\text{ m}\), which rounds to 1.23 m.

[1 mark] Award 1 mark for the correct calculation showing that the peak displacement is approximately 1.23 meters. No partial marks.

The coach utilizes blocked practice because each skill is practiced in a discrete block of repetitions (10 of one, then 10 of another) before moving to the next. The feedback is terminal because it is delivered after the completion of the practice trials, not during execution.

[1 mark] Award 1 mark for identifying blocked practice as the practice organization style and terminal feedback as the correct timing of the feedback.

During prolonged exercise at moderate intensity, muscle glycogen stores deplete over time. To maintain the energy requirements, the body progressively shifts its reliance from carbohydrates to lipids (fat oxidation). Thus, fat oxidation increases while carbohydrate oxidation decreases.

[1 mark] Award 1 mark for identifying the correct physiological shift towards lipid utilization during prolonged submaximal exercise.

On average, females have a higher essential body fat percentage (which is metabolic adipose tissue that does not contribute significantly to oxygen consumption during work) and a lower hemoglobin concentration (which limits arterial oxygen content). Together, these anatomical and physiological differences result in a lower relative \(\text{VO}_2\text{ max}\) compared to males.

[1 mark] Award 1 mark for identifying the combined effect of higher body fat percentage and lower hemoglobin concentration in female athletes.

The player is intrinsically motivated because they engage in the sport for inherent pleasure, satisfaction, and interest. They are task-oriented (mastery-oriented) because their success is defined by personal improvement, skill mastery, and effort rather than social comparison.

[1 mark] Award 1 mark for correctly matching the player's profile with intrinsic motivation and task (or mastery) orientation.

A twisting force applied about the longitudinal axis of a structure is called torsion. When a bone is subjected to torsion, it is exposed to shear, tensile, and compressive stresses, typically failing in tension along a diagonal path, producing a characteristic spiral fracture.

[1 mark] Award 1 mark for selecting the correct force type (torsion) and the associated fracture pattern (spiral fracture). No partial marks.

During submaximal steady-state aerobic exercise, stroke volume increases during the initial stages of exercise and typically plateaus at approximately 40% to 60% of VO2 max. Heart rate increases linearly with exercise intensity to meet metabolic demands and maintain a steady-state cardiac output. Diastolic pressure remains relatively constant, and total peripheral resistance actually decreases due to vasodilation in active skeletal muscles.

Award [1] mark for the correct option A. [1]

At intensities above the second ventilatory threshold, anaerobic metabolism dominates, leading to a rapid accumulation of lactic acid which dissociates into lactate and hydrogen ions (H+). The accumulation of H+ ions leads to metabolic acidosis, which stimulates the peripheral chemoreceptors to rapidly increase ventilation to blow off carbon dioxide and buffer blood pH.

Award [1] mark for the correct option B. [1]

Topspin causes the top surface of the ball to rotate in the direction of the oncoming airflow, which slows down the air velocity over the top (creating high pressure). The bottom surface rotates opposite to the airflow, increasing the relative air velocity underneath (creating low pressure). According to Bernoulli's principle, fluid flows from high to low pressure, creating a downward force (Magnus force) that causes the ball to dip quickly.

Award [1] mark for the correct option B. [1]

In the sliding filament theory, calcium ions released from the sarcoplasmic reticulum bind to troponin. This binding causes a conformational shift in tropomyosin, moving it away from the active binding sites on the actin filament, thereby allowing myosin heads to attach and form cross-bridges.

Award [1] mark for the correct option B. [1]

Video playback is a form of extrinsic (augmented) feedback because it comes from an external source rather than the sensory systems of the athlete. It represents knowledge of performance because it provides information about the execution and biomechanical technique of the movement pattern rather than just the outcome or result.

Award [1] mark for the correct option D. [1]

During the immediate post-exercise window (first 2 hours), insulin sensitivity is high and glycogen synthase activity is elevated. Consuming high glycemic index carbohydrates rapidly increases blood glucose and insulin levels, which maximizes the rate of muscle glycogen resynthesis.

Award [1] mark for the correct option B. [1]

Type IIa (fast oxidative glycolytic) fibers have a higher anaerobic/glycolytic capacity and contract much faster than Type I (slow oxidative) fibers, but they have a lower density of capillaries and mitochondria, making them less resistant to fatigue than Type I.

Award [1] mark for the correct option D. [1]

Catastrophe theory predicts that when cognitive anxiety is high, physiological arousal beyond the optimal point leads to a sudden and catastrophic decline in performance, rather than a gradual decline (which is predicted by the Inverted-U hypothesis). To regain optimal performance, the athlete must significantly reduce their physiological arousal.

Award [1] mark for the correct option B. [1]

During exercise, the vascular shunt mechanism redistributes blood to the active muscles to meet increased oxygen demands. This is achieved through the vasodilation of arterioles supplying active muscles, and the vasoconstriction of arterioles supplying non-essential organs such as the kidneys and gastrointestinal tract.

Award 1 mark for the correct option: b.

In projectile motion, when the release height is greater than the landing height (such as in shot put where the athlete releases from shoulder height), the optimal angle of release is always less than 45 degrees to maximize horizontal distance.

Award 1 mark for the correct option: b.

During the downward phase of a squat, the knee joint flexes under the resistance of gravity. The quadriceps (which are knee extensors) must contract to control this descent. Because the muscle is lengthening under tension, this is an eccentric contraction.

Award 1 mark for the correct option: c.

The triple jump takes place in a stable, predictable, and self-paced environment, making it a closed skill. It consists of a series of discrete movements (hop, step, jump) performed in a specific sequence, making it a serial skill.

Award 1 mark for the correct option: d.

Hypotonic drinks have a lower concentration of salt and sugar (osmolarity) than human blood. This concentration gradient allows the water to be absorbed very rapidly by osmosis, making it highly effective for rapid hydration.

Award 1 mark for the correct option: c.

Ectomorphy is characterized by linearity, a tall/thin body frame, and low body fat. This build is highly advantageous for endurance athletes as it provides a light frame and efficient heat dissipation.

Award 1 mark for the correct option: c.

During exercise, increased metabolic activity increases the production of carbon dioxide (pCO2). When carbon dioxide dissolves in blood, it forms carbonic acid, which dissociates and lowers blood pH. This decrease in pH (acidosis) is detected by chemoreceptors, triggering an increase in ventilation rate and depth to expel the excess carbon dioxide.

Award 1 mark for the correct option: a.

Topspin causes the top of the ball to rotate in the opposite direction of the oncoming airflow, slowing down the air and creating higher pressure. The bottom of the ball rotates in the same direction as the airflow, speeding it up and creating lower pressure. This pressure difference creates a downward Magnus force, causing the ball to dip rapidly.

Award 1 mark for the correct option: b.

During submaximal exercise, cardiac output increases to meet the metabolic demands of the working muscles. This is achieved by increases in both heart rate (HR) and stroke volume (SV). In untrained individuals, stroke volume increases up to approximately 40% to 60% of \(VO_2\) max, at which point it plateaus. Any further increase in cardiac output beyond this intensity is achieved solely through an increase in heart rate, which continues to rise linearly up to maximal levels.

Award 1 mark for the correct option (C). No partial marks.

In a second-class lever, the load is positioned between the fulcrum and the effort. When standing on tiptoes (plantarflexion), the ball of the foot acts as the fulcrum (pivot), the weight of the body acts downwards through the ankle/middle of the foot (load), and the calf muscles (gastrocnemius) pull upwards on the heel to provide the effort.

Award 1 mark for the correct option (B). No partial marks.

According to the sliding filament theory, during a concentric contraction, the actin (thin filaments) slides over the myosin (thick filaments). The A-band, which represents the length of the myosin filaments, remains constant. The I-band (containing only actin) and the H-zone (containing only myosin) both shorten as the overlap increases.

Award 1 mark for the correct option (B). No partial marks.

Feedback coming from an external source (the coach) is classified as extrinsic (or augmented) feedback. Because the feedback refers to the specific movement characteristics or mechanics of the action ('your racket face was slightly open') rather than the final outcome itself, it is categorized as Knowledge of Performance (KP).

Award 1 mark for the correct option (D). No partial marks.

Anaerobic glycolysis is the metabolic pathway that breaks down glucose in the absence of oxygen. This process occurs in the cytoplasm (sarcoplasm) of the cell, yields a net of 2 ATP molecules per molecule of glucose, and produces pyruvate, which is subsequently converted into lactate when oxygen supply is insufficient.

Award 1 mark for the correct option (B). No partial marks.

Genotype refers to the specific genetic makeup or DNA sequence of an individual (e.g., carrying specific performance-related genes like ACTN3). Phenotype refers to the physical, observable traits or characteristics of an individual, which are the product of the genotype interacting with environmental factors such as training, nutrition, and lifestyle.

Award 1 mark for the correct option (A). No partial marks.

Deci and Ryan's Self-Determination Theory posits that three innate psychological needs must be satisfied to optimize personal growth and intrinsic motivation: Autonomy (the need to feel in control of one's own behavior), Competence (the need to feel effective in performing tasks), and Relatedness (the need to feel connected with others).

Award 1 mark for the correct option (A). No partial marks.

Eccentric muscle contractions involve the lengthening of a muscle under tension. This type of contraction produces higher structural stress and forces on the myofibrils compared to concentric or isometric contractions, leading to micro-tears in the muscle fibers and triggering the inflammatory response known as Delayed Onset Muscle Soreness (DOMS).

Award 1 mark for the correct option (C). No partial marks.

**(a)(i)** The difference in mean sweat rate is \(1.8 \text{ L/hr} - 0.8 \text{ L/hr} = 1.0 \text{ L/hr}\). **(a)(ii)** First, calculate the total volume of sweat lost over 2 hours: \(1.8 \text{ L/hr} \times 2 \text{ hours} = 3.6 \text{ L}\). Next, calculate the total sodium lost by multiplying sweat volume by sodium concentration: \(3.6 \text{ L} \times 50 \text{ mmol/L} = 180 \text{ mmol}\). **(b)** In hot and humid conditions (Condition A), the body's core temperature rises. This change is detected by central and peripheral thermoreceptors, which send signals to the preoptic area of the hypothalamus (the body's thermostat). The hypothalamus coordinates autonomic nervous system responses, stimulating cutaneous vasodilation (bringing blood closer to the skin to radiate heat) and activating eccrine sweat glands to secrete sweat. Because high relative humidity limits the evaporation of sweat, core temperature remains high, leading to sustained and elevated sweat rates. **(c)** Before the race, the runner should consume 500-600 mL of fluid with sodium/electrolytes 2 to 4 hours prior to maximize fluid retention and plasma volume. During the race, they must avoid drinking excess hypotonic plain water, which can dilute blood sodium and cause hyponatremia. Instead, they should consume fluids matching their individual sweat rate, containing sodium (0.5 to 0.7 g/L) and carbohydrates (6-8% concentration) to maintain electrolyte balance, facilitate fluid absorption in the small intestine, and prevent significant dehydration.

**(a)(i)** Award 1 mark for the correct difference: 1.0 L/hr (accept 1.0 Litre per hour). **(a)(ii)** Award 1 mark for correct calculation of total sweat volume (3.6 L) and 1 mark for the correct final sodium loss (180 mmol). Allow error carried forward (ECF) if the volume calculation is incorrect but the multiplication process with 50 mmol/L is correct. **(b)** Award 1 mark per point up to 3 max: Rise in core temperature is detected by central/peripheral thermoreceptors; The hypothalamus acts as the integration center; Autonomic signals stimulate eccrine sweat glands to secrete sweat; Cutaneous vasodilation is initiated to transfer heat to skin surface. **(c)** Award 1 mark per point up to 4 max: [Before] Pre-hydrate with sodium-rich fluids to promote fluid retention; [During] Match fluid intake to individual sweat rate to prevent severe dehydration (>2% body weight loss); [During] Avoid over-consuming plain water (hypotonic) as it dilutes plasma sodium leading to hyponatremia; [During] Consume carbohydrate-electrolyte drinks (containing sodium) to replace sodium lost and accelerate intestinal water absorption.

**(a)(i)** The difference in maximal stroke volume is \(165 \text{ mL} - 110 \text{ mL} = 55 \text{ mL}\) (or 0.055 L). **(a)(ii)** Cardiac Output (\(Q\)) = Heart Rate (\(HR\)) \(\times\) Stroke Volume (\(SV\)). Convert stroke volume to litres (mL divided by 1000). For the untrained individual: \(192 \text{ bpm} \times 0.110 \text{ L} = 21.12 \text{ L/min}\). For the trained individual: \(186 \text{ bpm} \times 0.165 \text{ L} = 30.69 \text{ L/min}\). **(b)** During exercise, active skeletal muscles contract rhythmically, compressing the nearby deep veins. This squeezing action pushes the blood forward toward the heart. The presence of one-way venous valves prevents the backward flow of blood, ensuring that every muscular contraction moves blood closer to the right atrium, increasing venous return. **(c)** The trained individual has undergone chronic cardiovascular adaptations: 1. Left ventricular hypertrophy (increased volume and wall thickness of the left ventricle), which increases its capacity to hold and forcefully eject blood; 2. Increased myocardial contractility, resulting in more complete emptying of the ventricle per beat; 3. Increased plasma and total blood volume, which increases venous return and end-diastolic volume, stretching the myocardium and increasing stroke volume via the Frank-Starling mechanism; 4. At rest, cardiac output requirements remain relatively constant. Since stroke volume is substantially higher, the heart can beat less frequently to achieve the same resting cardiac output, resulting in sinus bradycardia (resting HR < 60 bpm). This is further facilitated by an increase in resting parasympathetic (vagal) tone and decreased sympathetic activity.

**(a)(i)** Award 1 mark for the correct difference: 55 mL or 0.055 L. **(a)(ii)** Award 1 mark for the correct untrained calculation: 21.12 L/min (accept 21.1 L/min); Award 1 mark for the correct trained calculation: 30.69 L/min (accept 30.7 L/min). Deduct 1 mark overall if units (L/min) are completely omitted. **(b)** Award 1 mark per point up to 2 max: Skeletal muscle contraction squeezes/compresses veins; One-way valves inside veins prevent backflow / ensure unidirectional flow back to the heart. **(c)** Award 1 mark per point up to 5 max: Left ventricular hypertrophy / larger left ventricular cavity size; Stronger myocardial contraction / increased contractility; Increased blood volume / plasma volume; Increased end-diastolic volume (preload) stretches the cardiac muscle, triggering the Frank-Starling mechanism (force-stretch relationship); Increased resting parasympathetic nervous system (vagal) activity; Recognition that resting cardiac output is stable, so a higher stroke volume mathematically reduces resting heart rate (\(Q = HR \times SV\)).

**(a)(i)** The difference in jump height is \(46 \text{ cm} - 39 \text{ cm} = 7 \text{ cm}\) (or 0.07 m). **(a)(ii)** The Countermovement Jump (CMJ) technique produced the larger peak vGRF (2200 N). **(b)** A scalar quantity is fully described by its magnitude (numerical size) alone, with no direction associated with it (e.g., mass, speed, or distance). A vector quantity requires both magnitude and a specific direction to be completely described (e.g., force, velocity, or acceleration). **(c)** The CMJ involves a rapid eccentric contraction (lowering phase where muscles stretch under tension) followed immediately by an explosive concentric contraction (upward phase where muscles shorten). This sequence constitutes the stretch-shortening cycle (SSC). During the eccentric phase, elastic energy is stored in the series elastic components of the muscle-tendon unit (primarily the tendons). This stored energy is released during the subsequent concentric phase, increasing total mechanical work and power. Furthermore, the rapid eccentric stretch activates muscle spindle fibers, triggering the stretch reflex (myotatic reflex), which increases neural drive and motor unit recruitment, resulting in a more forceful concentric contraction than the SJ, which lacks this active eccentric prep phase. **(d)** Newton's Laws apply as follows: 1. Law of Inertia (First Law): The athlete remains at rest on the ground until a net external force (muscular contraction overcoming gravity) changes their state of motion; 2. Law of Acceleration (Second Law): The acceleration of the athlete during take-off is directly proportional to the force applied to the ground and inversely proportional to their mass (\(F = ma\)). A higher net force results in greater vertical acceleration and take-off velocity; 3. Law of Action-Reaction (Third Law): When the athlete pushes down on the ground/force plate with a specific force (action), the ground exerts an equal and opposite upward ground reaction force on the athlete (reaction), which propels them into the air.

**(a)(i)** Award 1 mark for the correct difference: 7 cm or 0.07 m. **(a)(ii)** Award 1 mark for identifying the Countermovement Jump (CMJ). **(b)** Award 1 mark for defining/distinguishing both concepts (scalars have magnitude only, vectors have magnitude and direction); Award 1 mark for providing correct biomechanical examples (e.g., speed/mass/distance for scalar; velocity/force/displacement/acceleration for vector). **(c)** Award 1 mark per point up to 3 max: The CMJ utilizes the stretch-shortening cycle (SSC) which involves an eccentric phase followed by an immediate concentric phase; Elastic energy is stored in the muscle-tendon complex during the eccentric stretch; This stored elastic energy is released/recoiled during the concentric phase, boosting force production; The rapid stretch triggers the stretch reflex / muscle spindles, enhancing motor unit recruitment. **(d)** Award 1 mark for each law correctly applied to the take-off phase: First Law: The athlete stays stationary until they generate force exceeding their body weight; Second Law: Greater force application against the ground generates greater vertical acceleration (\(F = ma\)); Third Law: Pushing downward on the ground (action) causes the ground to push upward on the body (reaction).

**(a)(i)** During the acquisition phase, Group 1 (blocked practice) performed significantly better than Group 2 (random practice), scoring 84% compared to 68%. However, in the retention test one week later, Group 1's performance dropped sharply to 58% (a decline of 26%), whereas Group 2's performance improved to 76% (an increase of 8% relative to acquisition, outperforming Group 1 by 18%). **(b)** A motor program is a set of muscle commands/movement instructions stored in the long-term memory that can be retrieved and executed without the need for immediate sensory feedback to control the movement. **(c)** The contextual interference effect occurs when high interference during practice (such as random practice) results in poorer immediate performance during practice (acquisition) but superior long-term retention and transfer of skills. The data supports this as Group 2 (random practice, high interference) scored lower during acquisition (68%) than Group 1 (blocked, low interference, 84%), but scored much higher in the retention phase (76% vs 58%). This occurs because the random schedule forces learners to actively reconstruct the action plan in working memory on every trial, promoting deeper cognitive processing and more robust long-term memory pathways. **(d)** In the cognitive stage, the learner is trying to understand what the skill requires. The coach should primarily use extrinsic (augmented) feedback to provide external instruction and terminal feedback (after execution) to allow the learner to process errors without cognitive overload. As the performer transitions to the associative stage, they develop a movement template. Here, the coach should encourage the use of intrinsic feedback (internal sensory feel/proprioception) so the performer can detect their own errors. The coach can introduce selective concurrent feedback (during movement) to fine-tune active mechanics, and should reduce the overall frequency of extrinsic feedback to prevent the performer from becoming overly reliant on the coach's input.

**(a)(i)** Award 1 mark for describing Group 1's trend: scored higher in acquisition but experienced a major drop in retention; Award 1 mark for describing Group 2's trend: scored lower in acquisition but showed superior performance/retention in the delayed test. **(b)** Award 1 mark for defining motor program: a structured set of muscle commands stored in memory that determines details of the motor act. **(c)** Award 1 mark per point up to 3 max: Defining contextual interference (practice difficulty leads to superior long-term learning); Linking to the data showing blocked practice (Group 1) has better immediate performance (84%) but poor retention (58%); Linking to the data showing random practice (Group 2) has lower immediate performance (68%) but superior retention (76%); Explaining the mechanism: random practice forces active cognitive retrieval/reconstruction of the motor program. **(d)** Award 1 mark per point up to 4 max: Cognitive stage requires high levels of extrinsic feedback to establish basic movement patterns; Terminal feedback is essential in the cognitive stage to avoid distracting the learner during action; Associative stage shifts focus to self-monitoring / developing intrinsic feedback (proprioceptive/kinesthetic feel); Coach should decrease the frequency of extrinsic feedback in the associative stage to prevent dependence; Concurrent feedback can be introduced in the associative stage to make real-time corrections during execution.

**(a)** Both salivary cortisol levels and self-reported cognitive anxiety scores increased significantly from the regular-season match to the high-stakes playoff final. Specifically, salivary cortisol nearly tripled, increasing by 18 nmol/L (from 10 nmol/L to 28 nmol/L), and cognitive anxiety scores more than doubled, increasing by 16 points (from 15/36 to 31/36). **(b)** According to Multidimensional Anxiety Theory, cognitive state anxiety (worry, negative thoughts) has a negative linear relationship with performance; as cognitive anxiety increases, performance continuously decreases. On the other hand, somatic anxiety (physiological responses like increased heart rate or muscle tension) has an inverted-U relationship with performance, where performance is maximized at moderate levels of somatic anxiety and impaired at extremely low or high levels. **(c)** McGrath's stress process model explains this via four sequential stages: 1. Environmental Demand: The playoff final presents a high physical and psychological demand with highly significant consequences; 2. Subjective Perception of Demand: The athlete evaluates the situation and perceives an imbalance between the demands of the final and their own coping capabilities. This leads to a threat appraisal; 3. Stress Response: The perceived threat triggers a psychological and physiological stress response, resulting in elevated cognitive anxiety (31/36) and increased autonomic activity (salivary cortisol of 28 nmol/L); 4. Behavioral Consequences: The stress response subsequently impacts the athlete's actual athletic performance on the court. **(d)** Basketball players can use the following coping strategies: 1. Progressive Muscle Relaxation (PMR - somatic): systematically tensing and relaxing muscle groups to reduce physical tension; 2. Breath Control/Deep Breathing (somatic): slow, deep diaphragmatic breathing to lower heart rate and calm autonomic physiological arousal; 3. Mental Imagery/Visualization (cognitive): imagining the successful execution of free throws or team plays to enhance feelings of control and self-efficacy; 4. Positive Self-Talk (cognitive): replacing negative/worrying thoughts with instructional or motivational cues (e.g., 'trust the training, focus on the process') to reduce cognitive anxiety.

**(a)** Award 1 mark for stating that both physiological (cortisol) and psychological (cognitive anxiety) markers increased; Award 1 mark for referencing specific comparative data points from the study (e.g., cortisol rose from 10 to 28 nmol/L, or anxiety rose from 15/36 to 31/36). **(b)** Award 1 mark for describing the negative linear relationship between cognitive anxiety and performance; Award 1 mark for describing the inverted-U relationship between somatic anxiety and performance. **(c)** Award 1 mark per stage correctly outlined and applied to the scenario (up to 3 max): Stage 1 (Demand): the high-stakes playoff final creates a high objective demand; Stage 2 (Perception): the athlete perceives an imbalance between the match demand and their capabilities, viewing it as a threat; Stage 3 (Stress Response): this perception triggers the elevation of cognitive anxiety and cortisol levels; Stage 4 (Behavior): performance changes are seen as a consequence of the stress. **(d)** Award 1 mark for each of three valid coping strategies outlined (up to 3 max): Progressive Muscle Relaxation (somatic) to relieve muscle tension; Deep breathing/breath control (somatic) to lower physiological arousal; Cognitive imagery/visualization to mentally rehearse successful performance; Positive self-talk (cognitive) to build self-confidence and block out worries; Goal setting (cognitive) focusing on process goals rather than outcome.

(a) Cardiovascular drift is characterized by a progressive increase in heart rate and a decrease in stroke volume during prolonged submaximal exercise, particularly in warm conditions. The physiological mechanisms are as follows:
1. Thermoregulation causes increased sweating to dissipate body heat.
2. This loss of fluid leads to a decrease in blood plasma volume.
3. The reduction in plasma volume decreases venous return and end-diastolic volume (preload).
4. According to the Frank-Starling law, a lower end-diastolic volume results in a reduced force of contraction and a decrease in stroke volume (SV).
5. To maintain a constant cardiac output (\(\dot{Q} = \text{HR} \times \text{SV}\)) at the same exercise intensity, heart rate (HR) must increase.
6. Additionally, vasodilation of cutaneous (skin) blood vessels occurs to facilitate heat loss, which redirects blood away from central circulation, further lowering venous return.

(b) The redistribution of blood flow (vascular shunt mechanism) from rest to maximal exercise occurs to prioritize metabolically active tissues:
1. At rest, blood flow is distributed relatively evenly: digestive organs/liver receive ~20-25%, kidneys ~20%, skeletal muscles ~15-20%, brain ~15%, with the remainder going to the skin and heart.
2. During maximal exercise, overall cardiac output increases significantly (from ~5 L/min up to 20-25 L/min or more).
3. Vasodilation occurs in active skeletal muscles, increasing their share of blood flow to approximately 80-85% of total cardiac output.
4. Vasoconstriction occurs in non-essential organs (e.g., kidneys, digestive tract, liver), significantly reducing both absolute and relative blood flow to these regions.
5. Absolute blood flow to the heart muscle increases to meet increased myocardial demand, though it remains about 4-5% of total cardiac output.
6. Absolute blood flow to the brain is maintained for essential functioning, but its percentage of total cardiac output decreases.
7. Skin blood flow increases initially for thermoregulation but may decline during maximal intensity to prioritize active skeletal muscles.

(c) Long-term aerobic endurance training induces several chronic adaptations:
Cardiovascular Adaptations:
1. Left ventricular hypertrophy (increased internal chamber size), allowing for greater filling volume.
2. Increased stroke volume (SV) at rest, submaximal, and maximal exercise due to increased chamber volume and contractility.
3. Decreased resting and submaximal heart rate (bradycardia) due to increased parasympathetic tone and larger stroke volume.
4. Increased total blood volume and plasma volume, which increases venous return and cardiac output.
5. Increased capillarization of trained skeletal muscles, enhancing the exchange of gases and nutrients.
6. Increased arterio-venous oxygen difference (\(a-\bar{v}O_2\) diff), indicating greater muscle extraction of oxygen.

Respiratory Adaptations:
1. Increased maximal minute ventilation (\(\dot{V}_E\)) due to increases in both tidal volume and breathing frequency.
2. Increased pulmonary diffusion capacity, facilitating more efficient gas exchange at the alveoli due to increased capillary network around alveoli.
3. Decreased submaximal ventilation rate, meaning breathing is more efficient and requires less metabolic energy at a given workload.

(a) [6 marks] Award 1 mark per point up to 6:
- Prolonged exercise in the heat causes increased sweat rate for cooling.
- Sweating reduces blood plasma volume.
- Decreased plasma volume leads to reduced venous return / end-diastolic volume.
- Lower venous return leads to a reduction in stroke volume (Frank-Starling law).
- Cardiac output must remain constant to maintain the exercise workload.
- Cardiac output is the product of heart rate and stroke volume (\(\dot{Q} = \text{HR} \times \text{SV}\)).
- Therefore, heart rate increases progressively to compensate for the falling stroke volume.
- Vasodilation of cutaneous vessels for heat dissipation further compromises venous return.

(b) [6 marks] Award 1 mark per point up to 6:
- At rest, blood is distributed largely to visceral organs (kidneys ~20%, liver/gut ~20-25%) and less to skeletal muscles (~15-20%).
- During exercise, cardiac output increases dramatically in absolute terms.
- Vasodilation in active skeletal muscles redirects blood flow, receiving up to 80-85% of cardiac output.
- Vasoconstriction in non-active organs (kidneys, gut) significantly reduces their blood flow.
- Blood flow to the heart increases in absolute terms but remains constant as a percentage of overall cardiac output (~4-5%).
- Blood flow to the brain is maintained in absolute terms but decreases as a percentage of overall cardiac output.
- Skin blood flow increases during submaximal exercise for cooling, but can decrease at maximal intensities to prioritize working muscle.

(c) [8 marks] Award 1 mark per point up to 8 (accept up to 5 marks from either cardiovascular or respiratory adaptations alone to ensure breadth):
Cardiovascular:
- Left ventricular volume increases (eccentric hypertrophy).
- Stroke volume increases (at rest, submaximal, and maximal).
- Resting heart rate decreases (bradycardia) / submaximal heart rate is lower.
- Blood / plasma volume increases.
- Capillarization of active muscles increases.
- Increased arterio-venous oxygen difference (\(a-\bar{v}O_2\) diff).
Respiratory:
- Maximal minute ventilation (\(\dot{V}_E\)) increases.
- Pulmonary diffusion capacity increases / increased capillarization of alveoli.
- Submaximal ventilation becomes more efficient (lower oxygen cost of breathing for same intensity).
- Functional lung volumes (e.g., vital capacity) may show slight increases, though lung size does not change.

(a) Distinction between types of feedback:
1. Intrinsic feedback: Information received from the performer's internal sensory systems (proprioception, vision, vestibular apparatus). For example, the feel of the racquet hitting the ball or seeing the ball toss position.
2. Extrinsic feedback: Augmented information provided by an external source (coach's comments, video playback, a scoreboard). For example, a coach telling the player their elbow was too low.
3. Concurrent feedback: Information received during the execution of the motor skill. For example, sensing that the body is off-balance while in the middle of the backswing.
4. Terminal feedback: Information received after the movement has been completed. For example, seeing that the ball landed in the service box or the coach telling the player what went wrong after the point.

(b) Fitts and Posner's stages of learning applied to a tennis serve:
1. Cognitive stage: The beginner is trying to understand "what is to be done". Movement is uncoordinated, jerky, inconsistent, and highly reliant on visual cues and extrinsic feedback. High cognitive demand is required. Example: A novice player consciously thinking about every individual step (toss, swing, follow-through), resulting in a disjointed swing that frequently misses the ball.
2. Associative stage: The performer has established the basic movement pattern and enters a practice phase. Errors become fewer, and movements are more fluid and consistent. The learner begins to utilize intrinsic feedback to detect their own errors. Example: The player can consistently execute the serve into the court and notices when they have tossed the ball too low, making self-adjustments on the next trial.
3. Autonomous stage: The skill is automatic and requires minimal conscious control. Performance is highly consistent and efficient, allowing the player to focus on environmental cues (such as opponent positioning). Example: An elite player serves at high speed with precision to the opponent's backhand while observing the receiver's footwork, correcting minor issues automatically.

(c) Evaluation of massed and distributed practice for a novice:
Massed Practice:
- Definition: Practice sessions with very short or no rest intervals between trials; the practice time is much greater than the rest time.
- Advantages: Highly efficient use of time; can help build physical conditioning/muscular endurance; good for highly motivated athletes practicing simple skills.
- Disadvantages: Causes rapid physical fatigue, which degrades technique and increases injury risk; high cognitive fatigue leading to concentration loss, which is particularly detrimental to novices learning complex skills like a tennis serve.

Distributed Practice:
- Definition: Practice sessions where trials are interspersed with rest periods or alternative, lower-intensity activities; rest time is equal to or greater than practice time.
- Advantages: Minimizes physical fatigue, maintaining movement quality; provides essential recovery intervals that allow the novice to receive and cognitively process feedback; allows time for mental rehearsal between trials, which accelerates cognitive-stage learning.
- Disadvantages: Takes up more overall time; if rest periods are too long, the learner may lose momentum, focus, or motivation.

Synthesis:
For a novice acquiring a complex motor skill like a tennis serve, distributed practice is highly superior. It manages the high cognitive load of the cognitive stage and prevents physical/mental fatigue from disrupting correct motor pattern acquisition.

(a) [6 marks] Award 1 mark for each clear definition/distinction, and up to 2 marks for relevant examples:
- Intrinsic feedback is sensory information arising from inside the body (proprioceptors/kinesthesis).
- Extrinsic feedback is external information that supplements intrinsic feedback (coaches, video, telemetry).
- Example distinguishing intrinsic/extrinsic (e.g., feeling the ball contact vs. coach saying 'strike earlier').
- Concurrent feedback is received during the execution of the skill.
- Terminal feedback is received after the performance of the skill is completed.
- Example distinguishing concurrent/terminal (e.g., adjusting grip mid-swing vs. checking where the ball landed).

(b) [6 marks] Award 2 marks for each stage (1 mark for description, 1 mark for application/example of the tennis serve):
- Cognitive stage: High cognitive load, jerky movements, high error rates. Example: Novice thinking about mechanics of the toss and swing, often missing the ball or hitting it out.
- Associative stage: Practice phase, errors decrease, movement becomes smoother, beginning of self-correction. Example: Player consistently serves over the net, recognizes when the toss was too far forward, and adjusts.
- Autonomous stage: Highly automated, consistent, requires minimal conscious attention. Example: Elite player serves accurately at high velocity while focusing on the opponent's court position.

(c) [8 marks] Award 1 mark per point up to 8 (must evaluate both types of practice for full marks):
- Define massed practice (short/no rest intervals relative to practice time).
- Define distributed practice (rest intervals equal to or longer than practice time).
- Evaluation of Massed Practice:
* Advantage: High volume of practice in a short period / good for basic conditioning.
* Disadvantage: High risk of physical fatigue causing bad technical habits / increases risk of injury for a novice.
* Disadvantage: Can lead to boredom or mental fatigue, reducing attention.
- Evaluation of Distributed Practice:
* Advantage: Reduces physical fatigue, ensuring safer and higher-quality repetitions.
* Advantage: Allows rest intervals for coach feedback and cognitive reflection / mental rehearsal (ideal for novices).
* Advantage: Keeps motivation high through varied pacing.
* Disadvantage: More time-consuming overall / may break the rhythm or flow of learning.
- Conclusion/Synthesis: Distributed practice is more effective for novices learning complex skills (like a serve) to manage high cognitive demands and avoid fatigue.

(a) Somatic anxiety refers to the physical and physiological symptoms of anxiety, such as increased heart rate, muscle tension, sweating, and rapid breathing. Cognitive anxiety is the mental or psychological component, characterized by negative expectations, worry, self-doubt, and apprehension. (b) Stress is a non-specific response of the body to any demand placed upon it. Distress is negative stress, which causes anxiety, can decrease performance, and leads to physiological or psychological distress. Eustress is positive, beneficial stress that motivates the athlete, increases focus, and can enhance athletic performance. (c) The inverted-U hypothesis proposes that athletic performance increases with physiological and mental arousal up to an optimal point. If arousal levels become too low or too high, performance declines. Task difficulty shifts this curve: complex or fine motor tasks (e.g., pistol shooting) require lower optimal arousal levels, while simple or gross motor tasks (e.g., powerlifting) require higher optimal arousal. Personality also shifts the curve: introverts generally perform best under lower arousal conditions, whereas extroverts perform best at higher arousal levels. (d) PMR is a somatic relaxation technique where the athlete systematically tenses and relaxes major muscle groups. This helps the athlete recognize muscle tension and physically release it, lowering heart rate and promoting somatic calmness. Imagery is a cognitive technique where the athlete mentally simulates successful performances using all senses. It helps block out distracting stimuli, increases self-confidence, and reduces cognitive worry. (e) A PST program has three key phases: 1. Education Phase, where the athlete learns the importance of psychological skills and self-assessments. 2. Acquisition Phase, where strategies are developed and tailored to the athlete's specific needs. 3. Practice Phase, where techniques are integrated into daily training and simulated pressure sessions to automate the skills.

(a) Award [1] mark for a correct definition of somatic anxiety and [1] mark for cognitive anxiety. (b) Award [1] mark for defining stress (imbalance between demand and capability), [1] mark for distress (negative stress/harmful), and [1] mark for eustress (positive stress/motivating). (c) Award [1] mark for general inverted-U relationship (optimal arousal point), [1] mark for explaining how high arousal degrades performance, [1] mark for identifying fine/complex tasks need lower arousal, [1] mark for identifying gross/simple tasks need higher arousal, [1] mark for explaining introverts prefer lower arousal, and [1] mark for explaining extroverts prefer higher arousal. (d) Award up to [4] marks for PMR discussion (e.g., [1] for mechanism of tensing/relaxing, [1] for recognizing tension, [1] for physiological reduction in somatic symptoms, [1] for practical application before race) and [4] marks for imagery discussion (e.g., [1] for multi-sensory mental rehearsal, [1] for cognitive distraction block, [1] for boosting self-confidence/self-efficacy, [1] for practical routine integration). (e) Award up to [2] marks for the Education phase (identifying and understanding mental skills), up to [2] marks for the Acquisition phase (learning specific techniques like breathing and self-talk), and up to [2] marks for the Practice phase (systematic training, simulation, and automation).

(a) When exercising in the heat, the body undergoes cutaneous vasodilation, redirecting blood flow to the skin to dissipate heat. This reduces venous return to the heart. Dehydration from sweating causes a reduction in plasma volume, which lowers stroke volume (SV). To maintain cardiac output (\(Q = HR \times SV\)), heart rate (HR) must increase progressively; this is known as cardiovascular drift. (b) Heat acclimatization refers to physiological adaptations that occur naturally over weeks of training in a hot climate. Heat acclimation refers to artificial physiological adaptations induced under controlled laboratory conditions, such as an environmental chamber. (c) Hypoxia stimulates the kidneys to release erythropoietin (EPO), which triggers erythropoiesis (red blood cell production) in the bone marrow. This increases hemoglobin concentration and the oxygen-carrying capacity of blood. Other long-term adaptations include increased capillarization in muscle tissue, elevated myoglobin concentration, and an increase in mitochondrial density. (d) EPO increases red blood cell count, improving maximal oxygen uptake (\(VO_2\) max) and delaying fatigue. However, it increases blood viscosity, raising the risk of blood clots, hypertension, stroke, and myocardial infarction. (e) Active recovery (low-intensity exercise) maintains the muscle pump, enhancing venous return and speeding up lactic acid clearance. Compression garments exert external pressure, reducing edema/swelling, promoting venous blood flow, and mitigating delayed onset muscle soreness (DOMS).

(a) Award up to [6] marks: [1] for cutaneous vasodilation/blood redirection, [1] for sweating causing plasma volume loss, [1] for reduced stroke volume, [1] for compensation via increased heart rate, [1] for explaining cardiovascular drift, [1] for overall reduction in maximal exercise capacity in extreme heat. (b) Award [1] mark for defining heat acclimatization (natural/outdoor) and [1] mark for heat acclimation (artificial/chamber-based). (c) Award up to [6] marks: [1] for sensing low oxygen triggering natural EPO release, [1] for stimulation of red blood cells in bone marrow, [1] for increased hemoglobin concentration, [1] for increased capillarization, [1] for increased mitochondrial density, [1] for hyperventilation/respiratory changes. (d) Award up to [6] marks (maximum [4] marks if only benefits or only risks are discussed): [1] for EPO increasing oxygen-carrying capacity, [1] for improvement in aerobic capacity (\(VO_2\) max), [1] for delayed onset of fatigue, [1] for increased blood viscosity/thickness, [1] for increased risk of thrombosis/clots/stroke, [1] for moral/ethical risks (doping violations). (e) Award up to [5] marks: [2] marks max for active recovery (e.g., maintaining venous return, faster lactate clearance), and [3] marks max for compression garments (e.g., reducing exercise-induced muscle damage, reducing swelling/inflammation, improving venous return).