Q: I’m a bodybuilder and very interested in trying the 10-sets-of-10 method you’ve been writing about. I’m worried because using lighter weights and short rests [between sets] would appear to build primarily the slow-twitch and the fast-twitch endurance fibers [2As], and neglect the power fast-twitch 2Bs. Shouldn’t I be using heavy weights to get at the key 2B fibers?

A: You’re right, the 10×10 method primarily builds the type-2A fibers, those fast-twitchers with an endurance component (that’s why it works so quickly, as you’ll see in a moment). You don’t entirely neglect the 2Bs, however… [Read more…]