When do muscles moves?

Answer 1

The fastest a muscle fiber can contract is 0.01 seconds or less. However, this is not necessarily the speed that the actual muscle contracts at. For example, the human eyelid can only blink in 0.15 seconds.

Answer 2

Muscles move when you flex or relax them. They tighten or contract when you flex, lengthen when you relax

Answer 3

muscles contract when you tell them to...