Topic 9 Fatigue

Question 1

define fatigue

Answer 1

a reversible, exercise induced decline in performance

Question 2

Peripheral fatigue

Answer 2

Fatigue which develops rapidly as a result of reduced muscle cell force

Question 3

central fatigue

Answer 3

Fatigue which develops during prolonged exercise and is caused by impaired functions of CNS

Question 4

distinguish between high intensity and endurance activities

Answer 4

High intensity:
Anaerobic
85% + max hr
carbo hydrates + creatine phosphate
Endurance
aerobic
below 85% max hr
fats/carbs

Question 5

causes of peripheral fatigue in sprinters (5)

Answer 5

• Fatigue is perceived different by individuals
  age, prior training levels
• duration of sprint will determine rate of fatigue
• depletion of atp stores
  depletions of creatine phosphate
• increase in levels of lactate
• diet

Question 6

causes of Peripheral fatigue in long distance runniong (5)

Answer 6

-depletion of glycogen reserves reduces ATP production
-Reductions in CA2+ reduce muscle ability to contract
- dehydration: decrease in blood plasma, body increases HR
- Electrolyte loss: Minerals for contractions
- overheating: enzymes denature, impair muscle functions

Question 7

explain what happens as an athelte breathes heavily after a 200m sprint

Answer 7

• The greater the intesntiy the greater EPOC
• Oxygen deficit: when exercise begins oxygen demand cant be met
• initial stages are met by anaerobic process
  oxygen deficit is paid back after race
• alactacid componetn is replenished with first few mihutes: restoration of – Creating phosphate + Atp, myblobin levels are replenished
• lactatid slow phase: removal of lactic acid