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Flashcards in Lecture Note Questions Deck (23):
1

'Understanding of velocity and acceleration' is a...?

Biomechanical principle

2

The action-reaction law is a...

Biomechanical principle

3

The effects of arm and leg length and muscle power on torque production is an example of...

A biomechanical principle

4

The effects of centre of gravity location is an example of...

A biomechanical principle

5

The conservation of angular momentum is an example of...

A biomechanical principle

6

What is an open kinetic chain?

One end of the chain is fixed, the other is free to move.
The end of the chain can move independently of the other end.

7

Does the movement of proximal segments in an open kinetic chain always result in complete movement?

No

8

True or false: in an open kinetic chain, the end of the chain can move independently of the other end.

True

9

True or false: in an open kinetic chain, the end of the chain can NOT move independently of the other end.

False

10

Describe a push-like movement pattern.

All segments are moving simultaneously.

11

Describe a throw-like movement pattern.

Proximal segments move prior to distal segments

12

In an open kinetic chain, push-like patterns allow...

...high force or high accuracy

13

In an open kinetic chain, throw-like patterns allow...

...high movement velocities with less accuracy

14

What is the limitation of an open-chain push-like pattern?

Speed is limited to speed of muscle shortening.

15

How does an open chain throw-like pattern allow high movement speeds?

Transfer of angular momentum
Storage & release of elastic energy.

16

What is the radius of gyration, and what is it important in?

The distribution of mass with respect to a given axis of rotation.
Changes as point of rotation changes.
Important in calculating inertia: I = mk^2

17

What is the radius of gyration, and what is it important in?

The distribution of mass with respect to a given axis of rotation.
Changes as point of rotation changes.
Important in calculating inertia: I = mk^2

18

How does the conservation of angular momentum apply to open kinetic chain throw-like patterns?

By suddenly stopping the proximal segment, the momentum is transferred to more distal segments.

19

How do skilled performers complete a movement?

Large number of segments
Allowing segments to lag & whip
Free movement of joints
Proximal to distal sequencing
Large range of motion

20

How do unskilled performers complete a movement?

Small number of segments
Distal segments don't lag
Stiff joint movement
Lack of sequencing
Small range of motion

21

What is joint power?

The rate at which energy is created or absorbed around a joint.

22

What is running economy?

The energy demand for a given velocity of submaximal running.

23

What is Rate of Force Development?

The change in force over a given time.