Question

Why we need two muscles to work together to move a bone?

Answer 1

When you run, the messages to the brain are more involved, because many muscles have to work in rhythm. Muscles move body parts by contracting and then relaxing. Your muscles can pull bones, but they can't push them back to their original position. So they work in pairs of flexors and extensors.

Answer 2

As we need two hands to wash a cloth, same way we need two muscles to move a bone! Simple!