Biol 105

Biology 105
Biology of Exercise
Spring 2003

System Food or Fuel Require oxygen? Speed Maximal power (moles of ATP per minute)
Endurance

Maximal capacity (total amount of ATP available)

Phosphagen ATP or phosphocreatine No Fastest
3.6
Extremely Low 0.7

Anaerobic glycolysis Glucose (glycogen) No Fast 1.6 Low 1.2

Aerobic carbohydrates Glucose (glycogen) Yes Slow 1.0 High 90.0

Aerobic fat Fats (triglycerides) Yes Slow Extremely High nearly unlimited during ordinary exercise.

Notes:

Aerobic metabolism of fat can not occur in the absence of carbohydrate metabolism.
This table modified from Foss, ML and Keteyian, SJ. Fox's Physiological Basis for Exercise and Sport, 6th Ed., 1998.

System	Food or Fuel	Require oxygen?	Speed	Maximal power (moles of ATP per minute)	Endurance	Maximal capacity (total amount of ATP available)
Phosphagen	ATP or phosphocreatine	No	Fastest	3.6	Extremely Low	0.7
Anaerobic glycolysis	Glucose (glycogen)	No	Fast	1.6	Low	1.2
Aerobic carbohydrates	Glucose (glycogen)	Yes	Slow	1.0	High	90.0
Aerobic fat	Fats (triglycerides)	Yes	Slow		Extremely High	nearly unlimited during ordinary exercise.