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Countdown to Mass: Your Growth Threshold

Lee Labrada doing cable curls

Q: I get really winded on some exercises, like squats and rows, with only 35 seconds between 4X sets. I’m still sucking air when it’s time to start my next set. Is it okay to take more time?

A: Yes, but we believe that to get the DENSITY size effect you’re after with the 4X mass method, you should have a countdown so you don’t rest more than one minute between sets. Former pro bodybuilder Lee Labrada said… [Read more…]

Filed Under: X Files Tagged With: 4X, countdown, density training, growth threshold, Lee Labrada, legend & myth, master training, pro bodybuilder, rest, rest time, vince gironda

Crashing Through the Growth Threshold

Legendary Pro Bodybuilder Lee Labrada
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Q: You’ve mentioned the Growth Threshold a few times. What is that? What does it mean and how do I use it to get bigger?

A: Growth Threshold is a term we borrowed from champion pro bodybuilder Lee Labrada, pictured below. Here’s Lee’s explanation, from our 4X Mass Workout e-book:

The growth threshold is the point at which the level of fatigue in the muscle is high enough that a growth response is elicited. Your goal during a workout should be to fatigue the target muscles you are training more and more with each succeeding set. In other words, you want the muscles to progressively get more and more tired out, until you reach a point where the muscles are functionally ‘worn out.’ Signals are sent to the brain that set up the compensation, or growth, process during the postworkout period, so that in future workouts you can handle it.

Pro Bodybuilder Lee Labrada doing cable curls, Mike Neveux photo

Because you use the same weight on every set of a 4X sequence, and the first two sets are fairly easy, you gradually approach the growth threshold. The short 30-to-40-second rests between sets ensure that fatigue accumulates to a size-triggering climax at set 4.

For those not familiar with 4X, you take a weight with which you can get 15 reps, but you only do 10 deliberate reps; rest 30 to 40 seconds, then do 10 more. Rest 30 to 40 seconds again, then do 10 more. Rest 30 to 40 seconds one last time, then go to failure. If you get 10 on that fourth set, add weight to that exercise at your next workout…

Jonathan Lawson doing cable curls

As Labrada says,

I do not let my muscles regain all of their strength before starting the next set. After all, my goal is to fatigue my muscles more and more with each succeeding set until they hit the growth threshold.

And that’s what 4X sequences are all about—reaching the critical growth threshold without overtaxing the body’s recovery systems so you continue to ignite new, dramatic muscle growth at every workout. 4X training will give you size increases in both the myofibrils, the actin-myosin strands that produce force, and the sarcoplasmic endurance fluid in the muscle fibers.

And if you use a 4X sequence on the full-range 3-way Positions-of-Flexion programs for each muscle—midrange, stretch, and contracted, you reach the growth threshold for each and get a triple dose of muscle growth.

Get More 4X Info

NOTE: If you’ve been training with standard myofibrillar-dominant heavy sets—tension times of 20 seconds and rests of 2 minutes or more—you may want to increase your sarcoplasmic mass with a few weeks of PURE density training. For that, give 10×10 training a spin. You take a weight with which you can get 20 reps, but you only do 10. Rest 30 seconds, then do 10 more—and so on until you complete 10 sets. The last few rounds will be brutal, but the pump and sarcoplasmic size you ignite will be unreal. Use it on only one exercise per bodypart—10 minutes for each—for two weeks and watch the amazing changes in your physique.

Get More 10×10 Info

Till next time, train hard—and smart—for BIG results.

—Steve Holman and Jonathan Lawson
www.X-Rep.com


Build MASS with bodyweight training

One way you’re guaranteed to pack on stacks of muscle is through a process called muscle protein synthesis (MPS), which more than doubles 24 hours after an intense workout…

Until recently, MPS was only elevated when trainees would lift 70-90% of their one-rep max…



That’s not only dangerous for your joints, but it also sets you up for high injury risk every time you exercise…

It used to be believed that training with your own bodyweight couldn’t get you the same results as training with your 70-90% one rep max… Until NOW. 

–> How to build MASS with bodyweight training

Build Mass with Bodyweight Training

Filed Under: X Files Tagged With: 10x10 training, 4x mass workout, 4x sequences, 4x training, actin-myosin strands, bodyweight training, fatigue, growth threshold, Lee Labrada, muscle protein synthesis, myofibrils, pro bodybuilder, sarcoplasmic growth

Full-Range Back-to-Basics Mass Workout

Q: I just started reading up on your [Positions-of-Flexion] mass-building method. The full-range hit on each muscle makes so much sense that I can’t wait to try it. A friend said it helped him build 10 pounds of new mass in just six weeks. Where do I start? Is there a basic 4-days-per-week POF mass workout I can use?

A: We have POF in almost all of our e-books because it makes so much sense and has built so much muscle for so many—including us. [Read more…]

Filed Under: X Files Tagged With: back to basics, fiber activation, frank rich, freak physique, full-range, growth threshold, mass workout, massthetic arms, post-workout pump, testimonial, vascular arms, vascularity, veiny arms

Moderate-Weight Mass Building

Q: I love the Super-TORQ mass method you outline in the Power-Density 2.0 e-book. I’m 55 years old, so moderate weights are great for me, but I can’t quite wrap my head around doing such high reps at every workout. I alternate with heavy workouts as you suggest in the e-book because I’ve brutalized my joints over the years (screw you, heavy benches—Lol). Is there a MODERATE-power/Super TORQ workout I could use instead?

A: That’s an easy one—and we mention the solution in the Power-Density 2.0 e-book. You were probably just so into the new Super TORQ part of that e-book that you overlooked it… [Read more…]

Filed Under: X Files Tagged With: anabolic fasting, brad pilon, eat stop eat, growth threshold, intermittent fasting guide, mass building, moderate weight workouts, muscle-building, Power, power-density, Super TORQ

Research: Grow More Muscle With Simplified 2-Way Workouts

Q: You guys have opened my eyes to new ways to grow muscle. Your explanation of the myofibrils (force generation) and sarcoplasm (energy fluid) and how they both contribute to size is excellent. To build both of those fast, I want a simple, no-bells-and-whistles heavy-light program. What would you suggest?

A: Ah, the no-frills approach. It’s always good to go back to basics every so often, focusing on the force-generating myofibrils with a heavy workout and sarcoplasmic expansion with lighter DENSITY at the next… [Read more…]

Filed Under: X Files Tagged With: 10x10, belly fat burn, density, energy fluid, force-generation, growth threshold, heavy-light, muscle-protein synthesis, myofibrils, research, sarcoplasm

Muscle-Growth-Threshold Training for Fat Loss

Q: I know you suggest one second to lift and three seconds to lower. Do you ever use a slower lifting cadence, like lifting in three or four seconds instead of only one? Wouldn’t that produce more tension time for unique muscle-growth stimulation?

A: Yes, it can be a great variation for more mass creation as well as a fat-burning catalyst. But the big reason to slow down on the lifting stroke is for more strength. [Read more…]

Filed Under: X Files Tagged With: fat burner, fat loss, frank rich, GH, growth hormone, growth threshold, lactic acid, muscle burn, muscle-building, quick start, quick-start muscle building, rep cadence, strength, vascular arms, vascularity, veiny arms

Moment of Bodybuilding Zen 26: Doug Brignole, 59-year-old Mr. Universe

Brignole on stage with arms up

Our friend and colleague Doug Brignole just won the 2019 Drug-Free Mr. Universe Open division at age 59. Very impressive [photo courtesy of Doug Brignole ]… [Read more…]

Filed Under: X Files Tagged With: biotrust, bodybuilding zen, Brad Schoenfeld, Doug Brignole, drug-free, European Journal of Sports Science, free probiotics, free supplements, gas, growth threshold, high-rep, higher-rep training, mass building, mr. universe, power-density, pro-x10, probiotics, Super TORQ, tension-overload repetition quantity, TORQ, zen

Moment of Bodybuilding Zen 16: Lee Labrada

Lee Labrada never won the Mr. Olympia, but he got close due to his incredible symmetry, proportions, and muscle size and density. An Iron Man editor (Steve) gave him the monicker “Mass With Class” back in the ‘80s for good reason–his physique was a work of art (photo by Michael Neveux)… [Read more…]

Filed Under: X Files Tagged With: 4X, 4x mass method, after-40 muscle building, bodybuilding zen, density, fatigue, free pro-x10, free probiotics, free supplements, gas, growth threshold, iron man, Lee Haney, Lee Labrada, mass with class, Michael Neveux, mike mentzer, mike neveux, mr. olympia, muscle size, pro-x10, probiotics, proportions, protein farts, symmetry

DXO Works on Warmup Sets Too

Jonathan doing speed reps on cable curls

Q: I’m making some incredible progress using your Double-X Overload technique, but I wanted to let you know that I don’t just use it on my work sets. DXO works for warmup sets, too. I usually use it on at least one of my two warmup sets for the big [midrange] exercises. I feel much stronger on my work sets. Great technique!

A: That’s a good tip. We love feedback from fellow weight trainers who think instead of just following the pack. One reason DXO works so well on warmup sets is because of the enhanced occlusion and nervous system activation.

[Read more…]

Filed Under: X Files Tagged With: 3d muscle building, anabolic fasting, beyond x-rep, blood flow blockage, Double-X Overload, dxo, eat stop eat, explosive reps, fast-twitch, growth threshold, intermittent fasting, journal of strength conditioning research, nervous system, occlusion, ripped, strength, warmup sets, warmups, X Reps, x-hybrid tactics, x-rep partials

Weekly Change for Big Muscle Gains

Q: I want to thank you for the great programs and excellent tips, like X-Reps. My background is in Olympic lifting, but I’ve been into bodybuilding lately. I made some okay gains training heavy, but I’ve made much better and faster progress training heavy one week and using an all-4X program the next.

A: You didn’t really ask a question, but we just wanted to commend you on being brave enough to give all-4X training—every other week—a try.

So many trainees are stuck in the must-always-train-heavy-to-grow mentality that they miss out on significant muscle-size stimulation. It’s probably the key reason most complain about such slow gains. Plus, they get injured much more often.

[Read more…]

Filed Under: X Files Tagged With: 3d muscle building, 4X, 4x training, beyond x-rep, biotrust, bodybuilding, Double-X Overload, dxo, free protein, gains, growth threshold, heavy training, low-carb protein, muscle gains, olympic lifting, Power, power/rep range/shock, rest/pause, stage sets, weekly change, X Reps, X-Fade, x/pause

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