Energy Systems

Question 1

Power vs Capacity

Answer 1

Power = rate at which ATP can be produced

Max Capacity = total potential for ATP production when product is completely broken down

Question 2

Short-duration, high intensity exercise

Answer 2

Creatine Phosphate and fast glycolysis

Question 3

Long duration, low-moderate intensity exercise

Answer 3

Most ATP produced via aerobic glycolysis and FA oxidation

Question 4

Muscle Fuel Source:
- low intensity exercise
- moderate intensity
- high intensity

Answer 4

LOW: plasma FFAs (minimal reliance on muscle glycogen)

MOD: plasma glycogen increases and starts to rely on muscle glycogen stores

HIGH: muscle glycogen

** Muscles use more glycogen and less fat at higher exercise intensities !

Question 5

Energy Source for Endurance Exercise

Answer 5

Increased reliance on muscle glycogen. Over time, reliance is predominantly on blood glucose and FAs.

Carbs ingestion increases plasma glucose oxidation and reduces early glycogen utilisation and late FFA oxidation