During resistance exercise, muscles are
a. working against a force
b. repeatedly contracted
c. concerted in movement
d. all of the above

The answer is D. It is another name for practicing your muscles utilizing a restricting power moronic ringers or resistance groups. In the past times it used to be called 'Weight Training', yet this expression conjured pictures of colossal sweat-soaked men with protruding biceps and wasn't extremely prominent with ladies.

While carrying out resistance exercises, muscles have to work against a force, be repeatedly contracted and are concerted, or coordinated, while performing a specific movement. Therefore, the answer is D. all of the above. The requirement of having to work against a force by contraction promotes muscle growth, and carrying the activity out in a coordinated manner activates the entire muscle.