Welcome to Movement Analysis!
Ever wondered how coaches describe exactly how an athlete moves in space? In this chapter, we are looking at planes and axes of movement. Think of these as the "GPS coordinates" for the human body. They help us describe how we flip, spin, and side-step during sport. Don't worry if this seems a bit abstract at first—we’ll use simple analogies to make it click!
1. What are Planes of Movement?
Imagine a giant sheet of glass slicing through your body. That sheet is a plane. In PE, we use three specific planes to describe the direction of our movements.
The Sagittal Plane
The sagittal plane is a vertical plane that divides the body into left and right sides. Movements in this plane go forwards and backwards.
Example: Think of a person walking or running. Their legs move forward and backward within that "slice" of space.
The Frontal Plane
The frontal plane is a vertical plane that divides the body into front and back sections. Movements in this plane go side-to-side.
Example: Think of a star jump. Your arms and legs move out to the side, staying along the line of your shoulders.
The Transverse Plane
The transverse plane is a horizontal plane that divides the body into top (superior) and bottom (inferior) halves. Movements in this plane involve rotation or twisting.
Example: A discus thrower spinning around before they release the disc.
Quick Review Tip:
- Sagittal: Forwards/Backwards (like an arrow flying).
- Frontal: Side-to-side (like a piece of toast in a toaster).
- Transverse: Twisting (like a revolving door).
2. What are Axes of Movement?
While a plane is a flat surface, an axis (plural: axes) is an imaginary line or "rod" that runs through the body. The body rotates around this rod. Think of a table football player (foosball)—the players are attached to a rod, and they can only spin around that specific line.
The Frontal Axis
The frontal axis runs through the body from hip to hip (left to right). Imagine a rod going through your belly button from one side to the other.
Movement: This allows for forwards and backwards rotation (like a somersault).
The Sagittal Axis
The sagittal axis runs through the body from front to back (belly to spine). Imagine a rod pinned through your chest.
Movement: This allows for side-to-side rotation (like a cartwheel).
The Vertical Axis
The vertical axis runs straight down through the top of the head to the feet. Imagine a pole going through the center of your body from top to bottom.
Movement: This allows for twisting or turning on the spot.
Key Takeaway: An axis is the line we spin around. A plane is the space we move through.
3. Putting it Together: The "Golden Pairs"
For your exam, you need to know exactly which plane and axis work together for specific sporting actions. Pearson Edexcel focuses on three specific combinations. If you remember these three, you’ll be ready for most questions!
Pair 1: Sagittal Plane + Frontal Axis
When you move in the sagittal plane (forward/backward) around the frontal axis (side-to-side rod), you perform a "flip" motion.
Required Sporting Example: A front or back tucked/piked somersault in gymnastics or trampolining.
Pair 2: Frontal Plane + Sagittal Axis
When you move in the frontal plane (side-to-side) around the sagittal axis (front-to-back rod), you perform a "side-roll" motion.
Required Sporting Example: A cartwheel.
Pair 3: Transverse Plane + Vertical Axis
When you move in the transverse plane (horizontal) around the vertical axis (top-to-bottom rod), you perform a "spin" motion.
Required Sporting Example: A full twist jump in trampolining.
Memory Trick:
- Somersault = Sagittal Plane.
- Cartwheel = Sagittal Axis (Think: Cartwheel Sideways).
- Twist = Transverse Plane.
Common Mistakes to Avoid
1. Mixing up the Sagittal Plane and Sagittal Axis:
This is the most common error! Remember: The Sagittal Plane is for forwards/backwards movement (like a somersault), but the Sagittal Axis is the rod used for a cartwheel. They share a name but are used in different skills.
2. Forgetting the "Vertical Axis":
Sometimes students call this the "longitudinal axis." While that's used in other subjects, stick to Vertical Axis for your Edexcel PE exam to stay safe.
3. Overthinking:
You only need to apply these to the specific examples mentioned above. If a question asks about a somersault, your brain should immediately link it to the Sagittal Plane and Frontal Axis.
Summary Table for Revision
Use this table to test yourself before the exam!
Skill: Somersault (Tucked or Piked)
Plane: Sagittal
Axis: Frontal
Skill: Cartwheel
Plane: Frontal
Axis: Sagittal
Skill: Full Twist Jump
Plane: Transverse
Axis: Vertical
Note: This topic links closely to Lever Systems (Component 1, Topic 2.1). Understanding how the body moves in space helps you understand how levers apply force!