Question

How is capillary density in muscle related to maximal aerobic capacity?

a) Higher capillary density in muscle is associated with lower aerobic capacity
b) Higher capillary density in muscle is associated with higher aerobic capacity
c) Capillary density in muscle has no impact on aerobic capacity
d) Capillary density in muscle is determined by genetic factors.

Answer 1

Higher capillary density in muscle is associated with higher aerobic capacity.

Step-by-step explanation:

Higher capillary density in muscle is associated with higher aerobic capacity. Capillaries are tiny blood vessels that deliver oxygen and nutrients to muscle tissue. Increased capillary density allows for more efficient oxygen and nutrient delivery, which can support higher levels of sustained aerobic activity. This is why endurance athletes, who rely on aerobic activity, tend to have a higher proportion of slow-twitch muscle fibers, which are dense with capillaries.