Q: You’ve been diving into the growth-promoting potential of movements that emphasize the stretch phase of a muscle’s range of motion. Your science and logic seem pretty solid and correlates with some of the exercises I’ve done that cause significant soreness in a target muscle group. Do you think this could be as much a result of micro-damage from stretching as enhanced fiber recruitment? I could see this micro-trauma also causing hypertrophy, but I was curious if you had an opinion on this. I remember the sorest I’ve ever been was from an overly exuberant dive into stiff-legged deadlifts. I know biomechanics says that it’s almost exclusively a glute movement, but hamstrings do get a significant stretch under load at full extension, which my soreness verified. 

A: Here’s a quote from hypertrophy researcher Brad Schoenfeld, Ph.D., on a human study using stretch only, which produced impressive muscle hypertrophy (from Old Man, Young Muscle)… [Read more…]