Lecture 24 - Analyzing Throwing

Question 1

what is a throwing movement?

Answer 1

• segments moving in sequence from closest to furthest from the base to produce curvilinear motion

Question 2

what is the goal of throwing?

Answer 2

• maximize the speed of the end of the kinetic link chain

Question 3

what do you need to observe in a throw?

Answer 3

1. the segment, joint and muscles used
2. the timing of each segment

Question 4

how is inertia related to distance from the base?

Answer 4

• inertia is smaller further from the base
• because motion starts in the torso, you have to overcome large rotational inertia to throw

Question 5

what is a throw-like kick?

Answer 5

• a kick that maximizes the speed of the foot at contact with the ball
• less force
• lower segments have lag
• as you fire proximal segments, you need to stabilize the distal ones

Question 6

what are the 4 rules for comparing similar skills?

Answer 6

1. smaller and lighter = more segments used
2. smaller and lighter = greater radius of rotation
3. heavier and larger = greater involvement of muscles at the base
4. with racket/bat, eccentric orientation increases radius of rotation

Question 7

what are the 3 types of performance errors?

Answer 7

1. segmental movement errors (wrong axis, wrong ROM)
2. sequencing and timing errors
3. lack of strength or power

Question 8

how to develop/teach a throwing skill

Answer 8

• start at the distal end
• more precise motion with less power/force