The Claim
Approximately 70% of repetitions in resistance training are performed with the intended cadence despite natural tempo deviations under fatigue, which supports the feasibility of using time under tension as a programmable variable in training programs.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In resistance training, about 70% of repetitions maintain the planned speed even when fatigue causes natural changes in movement tempo, suggesting that time under tension can be reliably controlled and used as a training variable.
See the scientific wording
Approximately 70% of repetitions in resistance training are performed with the intended cadence despite natural tempo deviations under fatigue, supporting the feasibility of using TUT as a programmable variable in training.
When muscles get tired during lifting, sensory nerves in the muscles detect changes in tension and chemical buildup, and send signals to the brain that increase the effort to keep the movement speed steady. This keeps the lift at the planned pace even when the person is exhausted, allowing the total time the muscle is under strain to stay consistent.
What the research says
1 studyStudy: When duration matters: rethinking resistance training load through time under tension
Even when people get tired during weightlifting, they still mostly lift at the speed they planned to — about 7 out of 10 reps. This means coaches can reliably use lifting speed as a tool to design better workouts.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.