Topic 9
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Definition of fatigue
A reversible exercise induced decline in performance
Name the two types of fatigue
Central fatigue and peripheral fatigue
Central Fatigue
Develops during prolonged exercise and is caused by impaired function of the CNS
Peripheral Fatigue
Develops rapidly and is caused by reduced muscle cell force
Physiological causes of peripheral fatigue in endurance
Depletion of muscle and liver glycogen, dehydration, overheating and depletion of acetylcholine.
Physiological causes of peripheral fatigue in high intensity
Depletion of energy sources (ATP and Creatine Phosphate) Increase in the production of waste products like lactic acid
Types of recovery techniques from fatigue
Structured Rest, Stretching/cool down, Ice bath and Nutrition
Definition of EPOC
The amount of oxygen required to return the body to a resting level of metabolic function
What happens during EPOC
Lactic acid is broken down and removed from the body and muscle cells are resaturated. Glycogen and myoglobin stores are also replenished
Why does EPOC occur
The body enters oxygen debt during exercise leading to lactic acid build up meaning during recovery an over consumption of oxygen is required to return body to resting level
What happens during recovery in sport
Removal of lactic acid Replenishment of myoglobin Replacement of glycogen liver and muscle stores Replenishment of creatine phosphate