Crotix

I require immediate assistance with one topic pestering me for a while. How do you determine how much force a human can exert through punches, running, tackling, kicking jumping, or swimming? How does this force affect both organic and inorganic object? Does this force spread or does it stay concentrated within a small area? How do you determine how damaging this force can be? Any and all information would be helpful. Thanks to all in advance for providing any knowledge to help me.