Welcome to Flexibility Training!
In this chapter, we are exploring one of the most important but often overlooked components of fitness: Flexibility. Whether you are a gymnast performing a split or a rugby player reaching for a tackle, flexibility is the key to moving efficiently and staying injury-free. We’ll look at the different types of flexibility, what makes some people more "bendy" than others, and the specific training methods used by athletes to improve their Range of Motion (ROM).
1. What is Flexibility?
At its simplest, flexibility is the ability of a joint or series of joints to move through an unrestricted, pain-free Range of Motion (ROM).
The syllabus breaks this down into two main categories:
Static Flexibility
This is the ability to reach and hold a stretched position. There are two ways to do this:
1. Static Active Flexibility: You use your own internal muscle strength to hold the stretch. Example: Lifting your leg up and holding it there in the air using your hip flexors.
2. Static Passive Flexibility: You use an external force (like a partner, a piece of equipment, or even gravity) to hold the stretch. Example: Using a towel to pull your foot toward you for a hamstring stretch.
Dynamic Flexibility
This is the ability to move a joint through its full range of motion while in motion. It involves controlled, rhythmic movements.
Example: A swimmer performing arm circles to loosen up their shoulders before a race.
Quick Review:
Static = Holding a position (Still).
Dynamic = Moving through the range (Active).
Key Takeaway: Flexibility isn't just one thing; it's about being able to reach a position (static) and move through it (dynamic).
2. Factors Affecting Flexibility
Have you ever wondered why your friend can touch their toes easily while you struggle to reach your knees? It’s usually down to these four factors:
1. Type of Joint: Some joints are built for movement, others are built for stability. A ball and socket joint (like your shoulder) has a much higher ROM than a hinge joint (like your elbow).
2. Length of Surrounding Connective Tissue: This refers to your ligaments and tendons. If these tissues are "tight" or short, they limit how far the joint can move. Training can help "lengthen" these over time.
3. Age: As we get older, our tissues lose elasticity (they become less "stretchy") and we lose some of the fluid in our joints. This is why children are generally much more flexible than adults.
4. Gender: Generally, females tend to be more flexible than males. This is often due to hormonal differences (like higher levels of oestrogen and relaxin) and different bone structures (like wider hips).
Memory Aid: J-A-G-L
J - Joint type
A - Age
G - Gender
L - Length of tissue
3. Evaluating Flexibility
How do we know if our training is working? We need to measure it! The OCR syllabus focuses on two main methods:
Sit and Reach Test
This is the most common test you'll see in schools and gyms. It specifically measures the flexibility of the lower back and hamstrings.
Pros: It’s cheap, easy to do, and there are lots of "normative data" (standard scores) to compare yourself to.
Cons: It only measures one part of the body. You could have flexible hamstrings but very stiff shoulders!
Goniometer
A goniometer is essentially a 360-degree protractor with two long arms. It measures the specific angle of a joint in degrees.
Pros: It is very precise and can be used on any joint (shoulder, hip, ankle).
Cons: It requires a bit of skill to place it correctly on the "axis" of the joint.
Quick Review: Sit and Reach = General/Lower Body. Goniometer = Specific/Precise.
4. Training Methods to Develop Flexibility
Don't worry if these names seem a bit technical; they are mostly just different ways of stretching!
Static Stretching
The "classic" stretch. You stretch the muscle to its furthest point and hold it for 10–30 seconds. It is safe and effective for beginners.
Passive Stretching
As mentioned before, this uses an external force.
Analogy: Imagine a coach pushing your shoulders down further while you are in a seated stretch.
Dynamic Stretching
Taking a joint through its full ROM with control. Unlike "bouncing," this is controlled and specifically mimics sporting movements.
Ballistic Stretching
This involves bouncing or swinging movements to force the joint beyond its normal ROM.
Warning: This is often discouraged for non-elites because it can trigger the stretch reflex (where the muscle contracts to protect itself), which can lead to injury.
Isometric Stretching
This is where you hold a static stretch while contracting the muscle you are stretching.
Example: Pushing your leg against a wall while stretching your calf.
PNF (Proprioceptive Neuromuscular Facilitation)
This is the "gold standard" for increasing flexibility quickly. It usually requires a partner and follows a specific three-step process:
1. Stretch: Move the muscle to its limit.
2. Contract: Perform an isometric contraction (push against your partner) for about 6–10 seconds.
3. Relax and Stretch: Relax the muscle, then move it even further into the stretch. Your nervous system "tricks" the muscle into relaxing more than usual!
Did you know? PNF works by inhibiting the stretch reflex, allowing the muscle to stretch further than it normally would.
5. Physiological Adaptations and Sports
When we train flexibility regularly, what actually changes in our bodies?
Adaptations
1. Muscle and Connective Tissues: The resting length of the muscle increases. Tissues like tendons and ligaments become more elastic and "compliant."
2. Increased ROM: The primary result is a permanent increase in the range of motion at the specific joints trained.
Why does it matter for sport?
Flexibility is a key fitness component in almost every sport:
- Gymnastics/Dance: To achieve extreme aesthetic positions.
- Hurdling: To allow the lead leg to clear the hurdle without losing speed.
- Swimming: Flexible shoulders allow for a longer, more powerful stroke.
- Injury Prevention: Flexible muscles are less likely to tear (strain) when they are suddenly stretched during a game.
Summary/Key Takeaway: Flexibility training adapts our muscles and connective tissues to allow for a greater Range of Motion. This improves performance in specific skills and significantly reduces the risk of injury.