Tag: 21s

Full vs. Partial Range of Motion Training – Which is Best?

Are partial reps cheating, or are they the key to building even…

Patrick Dale, PT, ex-Marine

Hardest Gym Exercises: The Ultimate Guide

Are your gym sessions starting to feel a bit lackluster? Truth is,…

Cristian Fry

21s Workout: Not Just for Biceps!

It’s unclear who invented 21s, also known as the Matrix training system.…