I want to compare the much-talked about Cheeta running prosthesis to a the normal running process in terms of force and energy, but I don't know where to start. How would you start the comparison? A mathematical model would be much appreciated.
As mentioned in comments, the question isn't very well-defined, but I'll seed some ideas for basis of comparison.
Just some ideas, any of which would provide interesting basis for comparison in terms of "force and energy."