• X Shop
  • Checkout

X-REP.COM

Dedicated to Your Physical Transformation

  • Home
  • About Us
  • X Shop
  • X Files
    • Latest Articles
    • FAQ
    • Ezine Archive
  • Testimonials
  • Contact Us
  • Gallery
  • Subscribe

A Muscle’s Unique Mass Response, Part 1

Arnold in a tank top flexing his triceps

Recent studies seem to place stretch-loading and stretch exercises at the top of the mass-building food chain… [Read more…]

Filed Under: X Files Tagged With: blood-flow restriction, contracted position, European Journal of Sports Science, fiber recruitment, hypoxia, mass building, muscle building, research study, stretch loading

Stretch Best for Mass? Maybe Not…

Flexed and extremely striated triceps

You’ve no doubt seen all the studies showing that stretch-loading builds muscle mass significantly faster than contraction emphasis… [Read more…]

Filed Under: X Files Tagged With: contracted position, European Journal of Sports Science, research study, stretch loading, stretch position

Stretch Partials for More Mass (new study)

Illustration of leg extensions in the contracted position

Quite a coincidence. As I began writing this series on stretch overload, a new study appeared on the subject.

It was one I was hoping would eventually be done—although the trainees weren’t exactly to my specifications. The study… [Read more…]

Filed Under: X Files Tagged With: European Journal of Sports Science, muscle adaptions, partial reps, partials, research study, stretch exercise, stretch partials, stretch-overload

New Arm Mass: Stretch vs. Contraction

Mike Mentzer flexing his biceps

Researcher Chris Beardsley recently observed that the elbow flexors do not display as much potential for stretch-mediated hypertrophy as the elbow extensors. [Read more…]

Filed Under: X Files Tagged With: arm size, arm training, arm workout, Chris Beardsley, European Journal of Sports Science

Decoding the Latest Mass-Building Research

Steve doing incline curls

I recently discussed two current studies with insight into how you can speed the muscle-building process… [Read more…]

Filed Under: X Files Tagged With: European Journal of Sports Science, hypertrophy, mass building, muscle building, research, research study

Best Triceps Mass Move—Or Is It? (New Study)

Jonathan doing overhead extensions vs. pushdowns

Lots of posts on social media about the new 2022 study comparing the muscle-growth results of two triceps exercises… [Read more…]

Filed Under: X Files Tagged With: European Journal of Sports Science, research, study, triceps, triceps exercises

This Will Blow Your Mind: 2X Muscle Growth

Steve with a belly vs. smooth and muscular vs. cut

I’ve been reporting on Doug “Mr. America & Mr. Universe” Brignole’s latest training in which he does four sets per muscle on only one ideal exercise. His reps are: 30, 20, 15, 10.

He said that his muscle growth has been spectacular by training each muscle twice a week, four sets per workout. In fact, his gains have been so stellar, he’s thinking about coming out of retirement and competing again at age 63… [Read more…]

Filed Under: X Files Tagged With: drug-free, European Journal of Sports Science, jerry brainum, journal of applied physiology, muscle growth

Study: Double Your Muscle Growth

Jonathan spotting Steve for hammer curls

We harp on the Size Principle of Muscle Fiber Recruitment a lot. Why? Because it explains how to get the most muscle growth possible—in both the fast-twitch as well as slow-twitch fibers… [Read more…]

Filed Under: X Files Tagged With: Brad Schoenfeld, double your muscle growth, European Journal of Sports Science, fast-twitch, fiber recruitment, hypertrophy, journal of applied physiology, size principle of muscle fiber recruitment, slow-twitch, study

Light Weights, More Mass: New Research

Steve doing hammer curls

For the past two years, I’ve been training with lighter weights, usually starting each exercise for a muscle with a set of 20-plus reps.

That fatigues the slow-twitch fibers. After a short 20-second rest, I use the same weight and crank out another 10 to 12, which quickly shifts the muscle to fast-twitch-fiber activation… [Read more…]

Filed Under: X Files Tagged With: Brad Schoenfeld, dumbbell workout, European Journal of Sports Science, fast-twitch fibers, fiber activation, high-rep sets, hypertrophy, light weights, low-rep sets, more mass, physique, powerblock, research, slow-twitch fibers

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

:: Get the latest news and specials :: Sign Up for our Ezine!

Shopping Cart

Number of items in cart: 0

  • Your cart is empty.
  • Total: $0.00
  • Checkout

Log In

Copyright © 2026 · X-Rep.com