Time under tension

Time under tension is the total time a muscle stays loaded during a set.

Also known as: TUT

Controlling the eccentric (lowering) phase is one way to increase time under tension without necessarily adding load.

It is a useful variable, but a secondary one: volume, intensity and progression remain the main drivers of hypertrophy.

Sources

Scientific references behind this entry.

SelfShapeAI applies these concepts for you: it builds the plan, explains each decision and adjusts based on your context.