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6 Cards in this Set
- Front
- Back
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At rest and at exercise, trained athletes have a larger stroke volume and lower heart rate than untrained individuals. TRUE/FALSE
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TRUE. They also tend to have larger hearts.
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What is VO2max?
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IT is the product of maximum cardiac output and maximal O2 extraction by the tissues and both increase with training..
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Does training increase VO2max?
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Yes. VO2max averages about 38mL/kg/min in active healthy men and about 29mL/kg/min in active healthy women. It is lower in sedentary individuals.
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What changes occur in in skeletal muscle with training?
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There are increases in the number of mitochondria and the enzymes involved in oxidative metabolism. The number of capillaries increases with improved distribution of blood to muscle fibers.
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What is the net effect of the above response statement?
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There is more complete extraction of O2 and consequently for a given work load, less increase in lactate production.
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Why specifically is there less increase in heart rate during exercise in a highly trained athlete?
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Because the increase in blood flow to muscles is less.
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