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Forced X Reps: Brutal But Effective

Q: I’m back to a basic Positions-of-Flexion program, and I’m pretty stoked about it. I gained almost 10 pounds with it a year ago, so I figure it’s always good to return so something that works. My question is that I’m thinking about using Forced X Reps after reading X Rep Update #1. Should I add a set with those or do my last set in the pyramid as my forced set?

A: Forced X-Reps are one of the most brutal forms of overload—but incredibly effective in the mass-building department if you do them correctly and safely—with complete control, no jerking or heaving. For the uninitiated, here’s the brutality explained from X-Rep Update #1: [Read more…]

Muscle Expansion With Isolation

Q: Isn’t it true that you activate the most muscle fibers in the flexed position, like at the top of a leg extension or leg curl? I know that [Nautilus creator] Arthur Jones said that. So shouldn’t I really flex at the top of those isolation-type exercises? Come to think of it, why should I do compound exercises [like squats] at all? Isolating the muscle appears to be the logical way to stimulate the muscle growth best.

A: We respect the late Arthur Jones and value much of his research, theories, and opinions (Steve met him many years ago in Florida); however, newer research states the contrary—that the contracted, or flexed, position of an exercise is not where the most force/fiber activation occurs—it’s the bottom, where the target muscle is somewhat stretched. Here’s a quote from respected scientists Steven J. Fleck, Ph.D., and William J. Kraemer, Ph.D., that makes the point (we’ll put their statements in simpler terms in a moment): [Read more…]