When the body moves, what supplies the effort or input force?

When the body moves the muscles supplies the effort or input force. An effort force is a force that is used to move objects over a distance. It is the force that is used to get work done. The output force is the results of the input force or what one has accomplished. The force that moves the bones comes from the muscles. The energy that the muscles use to produce the force and move it through a distance comes from the food one eats.