The training effect,in which individuals experience improvements in physical fitness as they continue a regular exercise regimen,is a product of

Question

Quizplus · Accepted Answer

The training effect is a result of all three factors listed in the answer choices: an increase in the number of mitochondria in muscle cells, an increase in the number of capillaries in muscles, and an increase in the number of aerobic enzymes. As fitness improves, the body becomes more efficient at delivering oxygen and nutrients to the muscles, which enhances their capacity for work. This, in turn, leads to further increases in mitochondrial density, capillary volume, and aerobic enzyme activity.

The Training Effect,in Which Individuals Experience Improvements in Physical Fitness