L7, Special Biomechanical Principles

Question 1

Objectives:
- To understand the basic elements of deterministic modelling
- To be aware of biomechanical principles specific to certain types of activities
- To be able to apply these principles to various movements

Answer 1

Practical thoughts:
- These principles are interconnected (e.g., increasing time as in impulse-momentum likely also increases acceleration path)
- Carefully consider what’s most important in the movement
- Prioritise based on effect on performance and ease of implementation

Question 2

Why is the minimisation of inertia important?

Answer 2

Important in endurance and speed activities. Joint movements should have the distal segments in a position that minimises moment of inertia.

Question 3

Why is impulse generation-absorption important?

Answer 3

Important in force and speed activities. Impluse-momentum relationship.

Question 4

Why is maximising acceleration path important?

Answer 4

Important in movements requiring speed and force. Work-energy relationship

Question 5

Why is the sequential action of muscles important?

Answer 5

Important in activities requiring speed e.g., discus. Build up angular momentum, proximal to distal activation

Question 6

How is stability important and what are 2 biomechanical principles that can improve it?

Answer 6

Important for static as well as dynamic activities
- Low centre of mass
- Wide base of support can help increase stability