Practise questions

Question 1

What are the four limitations of modelling performance using deterministic models?

Answer 1

1) They are only theoretical in nature
2) There can be subjectivity when selecting levels and variables
3) There may be questions regarding which performance outcomes should be used
4) They sometimes miss underlying neuromuscular mechanisms

Question 2

What are the three ISB convention for force vectors?

1) Fy =
2) Fx =
3) Fz =

Answer 2

Vertical force = Fy
Anteroposterior force = Fx
Mediolateral force = Fz

Question 3

What can cause changes in stride length, stride frequency and maximum velocity?

Answer 3

Increasing age

Question 4

Which muscle is the prime mover in hip extension during jumping?

Answer 4

Gluteus maximus

Question 5

Torque is the product of moment of inertia and which other variable?

Answer 5

Angular acceleration

Question 6

What neuromuscular principle explains the difference in jump height between a countermovement jump and a squat jump?

Answer 6

The stretch shortening cycle

Question 7

What two things are calculated by inverse dynamics modelling?

Answer 7

1) Joint moments

2) Joint reaction forces

Question 8

The equation v = r∙ω is key in determining which variables contribute to linear velocity of the golf club head.

What is approximately represented by r?

Answer 8

Length of the golf club and the golfer’s arm

Question 9

What four things can a baseball player increase to aid their bat speed during baseball batting?

Answer 9

1) Increase the amount of force applied
2) Decrease the mass of the bat
3) Use a long stride into the shot
4) Use proximal to distal sequencing