Remaining Time 3 hours 15 minutes 14 seconds w Question Comp

Remaining Time: 3 hours, 15 minutes, 14 seconds. w Question Completion Status: A Moving to another question will save this response. Question 50 The initial decrease in vo2 max with detraining occurs because skeletalmuscle adaptations (a-vo2 difference) are lost. O True O False A Moving to another question will save this response.

Solution

50. true

This initial decrease in VO2 max is related to fall in maximal cardiac output which, in turn, is mediated by a reduced stroke volume with little or no change in maximal heart rate. A loss in blood volume appears to, at least partially, account for the decline in stroke volume and VO2max during the initial weeks of detraining, although changes in cardiac hypertrophy, total haemoglobin content, skeletal muscle capillarisation and temperature regulation have been suggested as possible mediating factors.

51. heat production can be voluntarily increased by shivering and excercise.

shivering induced by the body can increase heat production up to four or five times the normal resting level. Further increase can be induced by exercise.

52. all of the above

Aerobic training increases the capacity of the trained muscle to use fatty acids as a fuel results in reduced utilization of blood glucose and muscle glycogen, a lower rate of glycolysis and hence a reduction in the rate of lactate production.