With endurance training, muscle mitochondria increase in?

a. size and number

b. number only

c. size only

d. neither size nor number

Size and number.

Explanation:

Endurance training may be defined as the training used to endure and increase the muscles and makes individual fit and increases its endurance. The aerobic system of the body is trained in endurance training.

The endurance training creates various physiological changes in the individual organism. The size as well as the number of mitochondria increases in the endurance training. This increases the oxygen or aerobic activity of the body.

Thus, the correct answer is option (a).