HPHY 371 Midterm 2 study guide 2024
Direct calorimetry - process of measuring a person's metabolic rate via the measurement of heat production -direct measurement of metabolic rate Indirect calorimetry - direct relationship between O2 consumed and amount of heat produced -O2 consumption, CO2 production, N2 balance Oxygen deficit - -a lag due to slower activation of oxidative pathways -difference between oxygen uptake in the first few min of exercise and after an equal time period of steady state What is the steady state oxygen requirement? - the amount of oxygen required to do work is being met (supply meets demand) EPOC - excess post exercise O2 consumption How does the size and rate of EPOC vary with exercise? - rate and size increases with increases in exercise Why O2 consumption remains elevated after exercise - -rapid and slow components -elevated energy production to reestablish hormones Rapid factors contributing to EPOC - -resynthesis of PC in muscle -restoration of muscle and blood oxygen stores Slow factors contributing to EPOC - -lactate conversion to glucose (20%) -elevated body temp -post exercise elevation of HR and breathing -elevated hormones (Epi/NE) -synthesize glycogen Max O2 uptake - -good measure of aerobic capacity or fitness -VO2 increases directly with work rate until plateau -RER 1.1
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