X-REP.COM

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Jonathan: Chest, Back, Abs (Turkey Prep.)

I was running a bit late for the gym this morning, but it’s all about turkey prep. this next few days, so I had to go 100% regardless of timing. LOL! Great workout, and it’s so efficient currently that there was no need to rush to get the workout in, and I can feel my muscles ready to absorb a whole lot of turkey protein on Thursday… [Read more…]

X Reps are totally intense. They give my workouts a whole new feel. Muscle burn to the max. I love it. Can I use them on more than one set per exercise?

 

A: The whole new feel you refer to is the muscle continuing to fire after the nervous system halts full-range movement. That’s what makes X Reps such a powerful muscle-building tool. It’s ultimate intensity and overload. Plus, that muscle burn is one of the best ways to get surges in growth hormone.

In a study published in the Canadian Journal of Applied Physiology (22:244-255; 1997), researchers showed that there’s a direct correlation between higher blood lactic acid levels and GH release from the pituitary gland. That means the more muscle burn you can induce, the more growth hormone you can stimulate—up to a point. And growth hormone does everything from help you build muscle and burn fat to bolster your immune system and strengthen bones, ligaments and tendons. Talk about bodybuilding bonus points!

Because X Reps are so intense, most trainees will get best results by doing one straight set to failure followed by another straight set to failure with X Reps. The first straight set to failure is more of an extension of the warmup. A warm muscle can contract up to 20 percent better than a cold one, so having the muscle primed for your X Rep set is very important. (Most bodybuilders don’t warm up sufficiently, which can significantly limit progress.) The first heavy set to failure extends the warmup sets you do prior to your first work set, and it also pumps up nervous system reaction time so your X set is X-ponentially more effective.

If you have an above-average recovery ability, you may benefit from doing both sets with X Reps; however, if you try it and start feeling lathargic and lose your enthusiasm for training, back off. That’s overtraining trying to step in and stomp on your progress. Don’t let that happen. We recently tried doing a straight set, and then two X-Rep sets, but we felt too drained and backed off to one. The bright side is shorter workouts and better results. X Reps work, but you can’t abuse them.

JL & SH Abs

Bodybuilding bonus: While X Reps force more muscle-fiber activation, they also can trigger growth hormone surges via muscle burn. GH does everything from help you build muscle and burn fat to bolster your immune system and strengthen bones, ligaments and tendons.

Are X Reps better than forced reps, and if so, why?

 

A: Yes, X Reps are better because you extend the set at only the precise point in the exercise’s stroke that is key for force production and/or fiber activation. With forced reps, on the other hand, you writhe around as you strain through full range reps with help from your training partner. So while X Reps help you circumvent nervous system failure for an extra hypertrophic surge, forced reps waste a lot of nervous energy as you push through weak areas of the stroke with imprecise unloading (pushing or pulling from your partner). That’s why trainees who use a lot of forced reps tend to get tremors after training—they overstress the nervous system.

A recent study appears to confirm that (International Journal of Sports Medicine, 24:410-418. [2003]). It featured 15 male athletes engaged in either a maximum-reps routine or a forced-reps routine. Both types of training led to considerable increases in serum testosterone, free testosterone, cortisol and growth hormone; however, cortisol, which is a stress hormone that can cannibalize muscle tissue, was higher in the forced-reps group. Forced reps also produced a greater decrease in maximum muscular force, according to the researchers.

The greater loss of muscle power indicates that forced reps overstress the nervous system and the excess cortisol produces catabolism in muscle. In fact, many studies indicate that the biggest cause of overtraining is nervous system stress, and therefore forced reps do a lot to increase that probability—much more than X Reps. In other words, cue to X Reps short stroke, as opposed to full-stroke forced reps, we believe X-Rep training is a superior way to extend a set for a maximum growth response with less recovery and nervous system stress (Journal of Applied Physiology, 85:2352-2359. [1998]).