9 - Fatigue Flashcards
Fatigue
A revise letter exercise induced decline in performance
Why do muscles become fatigued ?
What are the symptoms?
Why they fatigue:
- impaired blood flow
- ion imbalance within muscles
- lactic acid build up
- calcium release in impaired
Symptoms of fatigue:
- muscle weakness
- dizziness
- headache
- short breath
- muscle cramps
Different types of fatigue
1) peripheral fatigue : from short exercises
- develops rapidly
- caused by reduced muscle cell force
- depletion of energy resources
- lactic acid build up
Sport example: sprinting
2) Central (mental) fatigue : during prolonged exercise
- impaired function of the central nervous system
Sport example: long distance running
Exercise intensity
Refers to how much energy is used when exercising
High intensity
Involves rigorous intense exercise that may last for less than a second to as long as 1/2 minutes, anaerobic process of ATP
Endurance exercise
Involves prolonged sessions of low intensity exercise that may last several minutes to several hours, aerobic process
Focus the causes of fatigue in different types of activity or exercise
Fatigue is perceived different by everyone and can be affected by multiple factors such as age, level of fitness ect
On a physiological level, the development of peripheral fatigue in HIGH INTENSITY ACTIVITIES depends on the rate of:
- depletion of energy resources ( creation phosphate and ATP)
- increase levels of products such as lactate or hydrogen ions
When the body exercises the level of acidity increases, meaning hydrogen ions increase. (Hydrogen ions measure the acidity)
On a physiological level causes of peripheral fatigue in ENDURANCE ACTIVITIES depend on:
- depletion of muscle and liver reserves
- reduction is Calcuim release
- depletion in acetylcholine
- dehydration
- electrolyte loss
- overheating
Central fatigue is caused by a failure of neural transmission
Discuss the recovery from fatigue after sports
Excess post oxygen consumption (EPOC) :
- restoration of muscle creatine
- removal of lactic acid
- replenishment of myoglobin stores
- replacement of muscle and liver glycogen stores
