I often do uphill sprints or flat sprints on the grass when I'm out hiking, but it's not something I plan for or set out to do specifically. Sprinting is just something I do whenever I feel like it.
I'm not sure I buy the argument that calves are trained by walking/sprinting. In that case, why bother doing squats and deadlifts? After all, we use those muscles when we walk/run also.
Sounds interesting. Do you have any picture/video link for that kind of exercise? I'm not sure I understood the explanation.
I don't understand why isolation exercises are getting such a bad rep? I would understand the critique if one is only doing isolation, but how can compound + isolation be worse than only compound? If I have energy for it, why should I not do it?