How to calculate Fm muscle force with known parameters

Hello, I want to use muscle length and speed changes to find muscle force;
I use the muscle length, speed and activation in the inverse dynamics output as the input. The muscle force and output calculated by the muscle force formula in the HILL model are very different. I would like to ask if Fm can be calculated using the formula, if possible. How to calculate Fm.
Thanks and best regards.

Hi @Breahnna

See my answer to the same question here: