Accurate blending of asymmetric gait animations?

We have several animations of gait cycles that we want to mix in the context of a learning app for therapists. Most of these gait cycles are asymmetrical (i.e., asymmetric step length on the left and right leg) and they can have a different duration. If possible, it would also be nice to be able to mix it with certain flavors (e.g., feminine, masculine, overweight, elderly,...)

Is there a way to blend between these animations in a way that is physically/biomechanically plausible? I assume that regular blending between animations won't achieve this.