Question

What happens when you increase a muscle’s endurance?

A)The length and flexibility of the muscle is increased.
B)The overall strength of the muscle is increased.
C)The thickness and size of the muscle is increased.
D)The length of time the muscle can contract without tiring is increased.

Answer 1

The length of time the muscle can contract without tiring is increased.

Answer 2

The answer is B I'm pretty sure of it.