Pure hypothesis, but…
Do you guys feel there is at least a correlation between the dominant fiber type within a muscle, and how frequently muscle tends to be used? If so, would this suggest what type of training stimulus would be more optimal for hypertrophy?
I know it’s been written by some coaches that fast-twitch dominant muscles should be trained with higher reps and lighter loads (I believe that’s what I’ve read), but I’m curious if the opposite isn’t better for hypertrophy.
For example, say the calves are used frequently since the muscles are stimulated even during walking.
What is the likelihood that the opposite type of loading - i.e. heavy loading, fewer reps - would be better for hypertrophy for that muscle, since the chronic stimulation that muscle receives is usually in the form of lower force contractions/higher reps (i.e. walking, etc) ? The goal being to shock the muscle with un-natural stimulus.
Can a muscle’s dominant fiber makeup be determined by the role the muscle plays in average, day-to-day function?
If so, would it be better to provide the stimulus that is un-natural for the muscle, e.g. heavy load / low reps for fast-twitch dominant (endurance) muscle tissue?