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Training/ Term

Time Under Tension (TUT)

"The total seconds a muscle is loaded during a set."

Definition

The full breakdown. What it is, why it matters, how to use it.

Time under tension is the duration a muscle stays under load in a working set. A set of 8 reps at a 2-second eccentric, 1-second concentric tempo takes about 24 seconds. Hypertrophy responds well to 30–70 seconds of TUT per set; under 20 seconds favors strength, over 70 favors endurance.

Q & A

Real Questions

01 answered
Question 01

Does slowing reps build more muscle?

Slowing the eccentric (lowering phase) to 2–4 seconds increases TUT and mechanical tension without sacrificing load — a reliable hypertrophy lever.

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