Question

What is measured by the amount of time a muscle group can sustain a contraction?

Answer 1

Answer:

This isolated contraction is called a twitch. A twitch can last for a few milliseconds or 100 milliseconds, depending on the muscle type. The tension produced by a single twitch can be measured by a myogram, an instrument that measures the amount of tension produced over time 

Explanation:

Sustainable Contractions