Reps vs. Time Under Tension: A Trainer Explains The Best Way to Build Muscle originally appeared on Men's Fitness. I’ve been a certified personal trainer (C.P.T.) for 15 years. In this ...

Time under tension (TUT) is a weightlifting technique designed to build muscle mass by increasing the time muscles spend activated during an exercise. We cover if it works and what its benefits are.

I’ve been a certified personal trainer (C.P.T.) for 15 years. In this decade-and-a-half period of time, I’ve been lucky to work with a wide range of people. This includes pro athletes of all levels, ...