__________ is one-third greater in both younger and older active sports participants than in healthy,inactive agemates.
A) Vital capacity
B) Muscle loss
C) Decrease in the speed of muscle contractions
D) Conversion of slow-twitch into fast-twitch muscle fibers

Question

Quizplus · Accepted Answer

Vital capacity, which is the maximum amount of air that can be exhaled after taking a deep breath, is known to decrease with age and inactivity. However, studies have shown that younger and older adults who participate in active sports have a vital capacity that is one-third greater than their inactive agemates, indicating the positive impact of physical activity on lung function. Muscle loss (B) and the conversion of slow-twitch into fast-twitch muscle fibers (D) can occur with aging and inactivity, but are not specifically related to the increase in vital capacity observed in active sports participants. The speed of muscle contractions (C) may also decrease with age and inactivity, but is not mentioned in the given statement.

__________ Is One-Third Greater in Both Younger and Older Active