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Exercise Physiology
Ch. 4 Exercise Metabolism (Exam 1)
11
Other
Undergraduate 3
09/29/2010

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Cards

Term
Oxygen Deficit, and what does it suggest?
Definition

the lag in oxygen uptake at the beginning of exercise.  

Suggests anaerobic pathways contribute to the total ATP production, and after steady state, it's met through aerobic ATP production

Term

 

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Definition
oxygen debt and oxygen deficit.
Term
Factors that contribute to EPOC
Definition

1. Resynthesize stored PC in muscle

2. replace O2 stores in both muscle and blood

Slow Portion of EPOC:

1.elevated body temp

2.O2 required to convert lactic acid to glucose (gluconeogenisis)

3. elevated blood levels of epinephrine and norepinephrine

Term
O2 Consumption at rest
Definition
3.5 ml of oxygen/kilogram(weight) per minute
Term
Oxygen Debt vs. Deficit
Definition

Debt: aka EPOC is the oxygen consumption above rest after exercise

Deficit: Lag in oxygen uptake at beginning of exercise

 

Term
Define and when does an O2 drift occur?
Definition

Not reaching a steady state during prolonged exercise because of hot/humid environment or exercise at a high relative work rate >75% VO2max

 

Term
Oxygen uptake increases in a linear fashion during incremental exercise until what?
Definition
VO2max is reached
Term
Respiratory exchange ratio
Definition

VCO2/VO2...aka RQ

Carbon dioxide output/oxygen input

Term
RQ for fat vs. Carb
Definition

Fat: .70

Carb: 1

Term
Why does fat oxidation require more oxygen that carbs?
Definition
Because carbs contain more oxygen to begin with
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