• 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

Try This for New Growth Fiber Activation and Muscle Expansion

Q: I’ve been using MMX Compound Aftershock [from a recent newsletter]. The high-rep stretch exercise first, before the big compound move, really makes a difference. What a great burn and pump. If I use a high-rep contracted-position move first, is that postactivation?

A: Yes, you could consider it postactivation, as it too increases growth-fiber recruitment on the second big exercise. So for quads, Compound Aftershock would be high-rep sissy squats followed by a superset of lower-rep sissies and squats…

MMX Compound Aftershock
Sissy squats, 1 x 20
Rest 40 seconds, add weight
Superset: Sissy squats, 1 x 10 with Squats, 1 x 10

MMX Isolation Aftershock
Leg extensions, 1 x 20
Rest 40 seconds, add weight
Superset: Leg extensions, 1 x 10 with Squats, 1 x 10

Jonathan Lawson leg extensions - Try This for New Growth Fiber Activation and Muscle Expansion

Remember, a recent study showed that beginning a body part workout with a high-rep set does excellent things for faster muscle growth. A high-rep set pre-fatigues slow-twitch fibers, gradually activating more fast-twitch fibers. Then you add weight and more fast-twitch growth fibers fire due to that first high-rep anabolic-primer set. 

You can do two rounds of the superset, after the high-rep primer set. And/or you can always complete the Positions-of-Flexion chain—that is, add leg extensions to the end of the Compound Aftershock series, or add sissy squats after the Isolation Aftershock routine.

POF mass training is very flexible—and efficient at building mass—you just have to find new ways to mix or combine the three exercises (positions) for new mass stimulation.

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

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


Boost Testosterone…
With Cardio?!

If you want to build muscle (of course you do!) and ramp up your testosterone levels while burning a ton of fat at the same time, you need to try this workout if you haven’t already…

–> Use this cutting-edge cardio trick to boost testosterone and muscle growth
Note: This is NOT traditional HIIT or boring steady-state cardio

Filed Under: X Files Tagged With: anabolic primer, compound aftershock, fast-twitch, fiber activation, fiber recruitment, isolation aftershock, MMX, mmx compound aftershock, mmx isolation aftershock, muscle expansion, muscle growth, pof mass training, positions of flexion, postactivation, pre-fatigue, slow-twitch, try this

:: 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