Here is a good project for those interested in learning the equation of human force in the performance of the pushup.
Power is the rate at which work is done. In order to estimate the horsepower output during an exercise, we must know how much work is done during a time interval. The work done is the product of the force exerted and the distance the force is exerted over.
Ref.
Teacher's Guide
So, Neo, why don't you go first. Give us an example of what this all means. I looked at the article, but it is waaaaayyyyyy over my head.