Exercise Physiology

Question 1

Energy system used for high intensity, short duration exercise (I.e. 100m sprint)

Answer 1

ATP-PC system

Phosphagen system

Question 2

The phosphagen system represents the most rapidly available source of ATP for muscle use.

3 reasons why the energy system is able to function this way

Answer 2

1. Doesn’t depend on a long series of chemical reactions
2. Doesn’t depend on transporting oxygen we breathe to the working muscles
3. ATP and PC are stored directly within the contractile mechanisms of the muscle

Question 3

Supplies ATP during high intensity, short duration activities such as sprinting 400 or 800 meters

Answer 3

Anaerobic glycolysis

Question 4

How much slower than phosphagen system is glycolysis?

Answer 4

50%

Question 5

Anaerobic glycolysis can provide approximately _________ seconds of muscle contraction

Answer 5

30-40s

Question 6

3 reasons anaerobic glycolysis functions

Answer 6

1. Doesn’t require oxygen
2. Only requires carbohydrates (glucose and glycogen)
3. Releases enough energy for the resynthesis of only small amounts of ATP

Question 7

When is the aerobic system used predominantly?

Answer 7

Low intensity, long duration exercise

Question 8

Aerobic system provides energy by the oxidation of ______

Answer 8

Food