X-REP.COM

Dedicated to Your Physical Transformation

Exciting Muscle-Size Insights

Q: After reading one of your articles that discussed the study where light, longer sets built muscle, I was thinking that maybe that’s why X Reps build so much size. Because they’re partial reps where the muscle is stretched, you block blood flow and get more tension time by making the set last longer. Do you think that’s the case—that X Reps work because they make a set last longer?

A: No doubt that ex-tending the set with X-Reps is one reason those power partials are so effective at building more muscle. As you said, you not only pulse at the target-muscle’s strongest point, where it’s elongated, but you also force the muscle to continue firing for five or more extra seconds—which means a longer tension time on any set with X Reps tacked on. That was the ground-breaking finding of that study—that extending tension time was another way to trigger hypertrophic stimulation…

[Read more…]

Sets, Reps, and Muscle-Size Success

Q: I have a 4X question. Let’s use incline dumbbell presses as an example. I do the first 3 sets of 10 reps with 60 pounds. On the 3rd set, I hit the 10th rep, but it isn’t easy. After 30 seconds rest I do my 4th set, but I can only get 5 or 6 reps. Is it better to keep pushing with the 60s until I hit 10 reps on all 4 sets, or should I drop the weight to 55 pounds for all 4 sets, increase the reps to 12 and try that for a few weeks? Any thoughts?

A: We prefer 10,10,10,6, striving to get more reps on that last set at each workout. For most muscle groups, 10 reps seems to be ideal for getting BOTH power and density size effects in the key 2A growth fibers. But there is a place for 4×12 sequences, as you’ll see… [Read more…]