Popsugar Fitness Fitness Tips Muscle-Up TRX Modification This Move Is Way Harder Than a Pull-Up — but 1 Trainer Has the Perfect Modification July 18, 2019 by Samantha Brodsky View On One Page Photo 2 of 2 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Here's That First Part 1 More Time Previous Next Start Slideshow Fitness TipsWorkoutsTRXArm Exercises