why do our our arm and hands shake when exerting max effort?

Question

An example of that would be when we try to grip on something as hard as we can, our hands would shake.

In: 221

Answer 1

Generally speaking we have two different kinds of muscle fibers, slow and fast. The slow ones allow us to do precise work, like threading a needle, but they aren’t very strong. The fast ones on the other hand are really strong, and will let us do things like remain standing when we jump down from a height.

Usually when we do something, we use just the right combination of slow and fast fibers, allowing us to use the precision we need while still getting the strength we need. At max effort however, *all* fibers will be used and it becomes very obvious that the fast fibers aren’t that precise.

Answer 2

Generally speaking we have two different kinds of muscle fibers, slow and fast. The slow ones allow us to do precise work, like threading a needle, but they aren’t very strong. The fast ones on the other hand are really strong, and will let us do things like remain standing when we jump down from a height.

Usually when we do something, we use just the right combination of slow and fast fibers, allowing us to use the precision we need while still getting the strength we need. At max effort however, *all* fibers will be used and it becomes very obvious that the fast fibers aren’t that precise.