Originally Posted by Povl Carstensen
You can not hit with a limb arm. And hitting with a fixed arm does not seem right. So there must be some dynamic muscle action, as in contraction (pull). Just reflecting on this.
Obviously. Even to "push" something, skeletal muscles contract in pairs (flexor and extensor) (because skeletal muscles cannot expand). That is how joints are operated. Don't confuse this contraction (or pull as you call it) with the overall effect of the body on an object.