HMS, BM EQ-Bank 22

Analyse how the coordination of joint actions at the hip, knee and ankle contributes to the generation of power in a vertical jump. Use biomechanical principles in your response. (3 marks)

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Sample Answer

Vertical jump

Begins with simultaneous flexion at the hip, knee and ankle joints, creating a pre-stretch that enables the stretch-shortening cycle to be utilised.
The sequential extension of these joints follows a proximal-to-distal sequence
- Starting with powerful hip extension
- Followed by knee extension and ankle plantarflexion.
This coordinated triple extension allows for optimal force summation through the kinetic chain, maximizing the vertical displacement achieved in the jump.

Show Worked Solution

Sample Answer

Vertical jump

Begins with simultaneous flexion at the hip, knee and ankle joints, creating a pre-stretch that enables the stretch-shortening cycle to be utilised.
The sequential extension of these joints follows a proximal-to-distal sequence
- Starting with powerful hip extension
- Followed by knee extension and ankle plantarflexion.
This coordinated triple extension allows for optimal force summation through the kinetic chain, maximizing the vertical displacement achieved in the jump.