exercise physiology Flashcards
1
Q
anaerobic metabolism
ATP-PC or phosphagen system
A
- ATP production during high intensity, short duration exercises - 11m sprint
- process almost instant: phosphocreatine -> ATP
- provides E for muscle contraction up to 15s
- does not depend on long chemical reactions
- does not depend on O2 transport to muscles
- ATP and PC stored within contractile mechanisms of muscle
2
Q
anaerobic glycolysis
lactic acid system
A
- major supplier of ATP during high intensity, short duration (sprint 400-800m)
- stored glycogen split into glucose -> split again to pyruvate through glycolysis, E released forms ATP
- no O2 required
- results in lactic acid formation - causes muscular fatigue
- 50% slower than PC system and can provide 30-40s muscle contraction
- does not require O2
- only uses carbohydrates (glycogen and glucose)
- release enough E to synthesize small amounts of ATP
3
Q
aerobic metabolism
oxygen system
A
- used doring low intensity, long duration exercise (running a marathon)
- yields most ATP by requires series of complex chemical reactions
- E throug oxidation of food – fatty foods, amino acids, glucose with O2 release
- provides E as long as there are nutrients to utilize