Training and exercise are beneficial because they

Question

Quizplus · Accepted Answer

Training and exercise stimulate the growth of new mitochondria in muscle cells, which in turn improves the cells' ability to produce energy. This is one of the primary benefits of exercise. On the other hand, choices A, C, and D are all incorrect. Reducing blood volume and red blood cell count would actually be detrimental to exercise performance, as it would impair oxygen delivery to the muscles. Similarly, reducing the number of capillaries in muscle tissue would impair blood flow and nutrient delivery, while reducing the number of mitochondria in muscle cells would impair the cells' ability to produce energy.

Training and Exercise Are Beneficial Because They