Chapter 8 (fatigue) Flashcards
what are the 2 types of fatigue
anaerobic and aerobic
what are the 2 types of anaerobic fatigue
PC depletion and Accumulation of H+
what happens when PC depletion occurs
switches to anaerobic glycolysis system, slower rate and intensity
What happens during accumulation of H+
increases muscle acidity, which decreases the rate of glycolysis, which lowers intensity to oxidize the muscles
how many seconds does it take before accumulation of H+ becomes dominant over PC depletion
20 seconds
what recovery is required to replenish PC stores and how long does it take to restored
Passive, 30 seconds: 70% 3 mins: 98% 10 mins: 100%
what recovery is required to oxidize accumulation of H+
active recovery
What is LIP
Lactate inflection point, last point that lactate production and removal is equal
what are the main aerobic fatiguing factors
glycogen depletion, decreased CNS firing and elevated body temperature
How long does it take for glycogen depletion become the major fatiguing factor
2 hours
What happens in glycogen depletion
switch to fats of food source, slower rate of ATP resynthesize because more oxygen is required to break them down
How long does it take for elevated body temperature to become the major fatiguing factor
30 minutes
what happens during elevated body temperature
sweat happens
what happens when you sweat
blood moves towards the skin, loss of electrolytes and decreased blood plasma
what happens during decreased blood plasma
increased blood viscosity, increased HR and cardiac output
