Biomechanics

Question 1

What is stability?

Answer 1

The capacity of an object or individual t return to equilibrium or its original position after having been displaced

Question 2

Size of the base of support

Answer 2

Base of support is defined as the area within an outline of all ground contact points

Increase base of support increases stability

Base of support must be increased in the direction of the force to enhance stability

Question 3

Height if the centre of gravity

Answer 3

Lowering body position - bending of knees will lower the centre of gravity to increase stability

Question 4

Location of the centre of gravity projection within the base of support

Answer 4

The line coming vertically down from the centre of gravity is called the projection

If the projection moves outside the base of support you are more unstable

Question 5

Agonist and Antagonist

Answer 5

Agonist is a prime mover in a movement

Antagonist is muscles oppose the prime mover to slow down or stop movement

Question 6

Stabilisers and neutralisers

Answer 6

Stabilisers refer to muscles that are active isometrically to keep a lomb from moving when the agonist contracts

They prevent unwanted movements of a muscle so that a specific movement can occur

Question 7

Synergists

Answer 7

Muscle that assists in producing the desired action of an agonist muscle

Question 8

example of first second and third class levers

Answer 8

First - Tricep extensions
2nd - calf raise
3rd - Bicep curl

Question 9

Mechanical advantage and disadvantage

Answer 9

To calculate mechanical advantage we divide moment arm of muscle force. by moment arm of resistive force

More than 1 is a mechanical advantage

Less than 1 is a mechanical disadvantage