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Is Time-Under-Tension Important for Muscle Growth?

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Is Time-Under-Tension Important for Muscle Growth?

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The term “Time-under-tension” (TUT) is really hot in the bodybuilding, athletic consulting, and fitness industries. It refers to the amount of time per rep (or set, or exercise, or workout) that the muscle is under tension. For example, if an athlete takes 4 seconds to perform a biceps curl, it is said that the TUT was 4 seconds. If someone performs 100 repetitions, then the workout TUT was 6 minutes and 40 seconds. Many people want to know, “What is the best TUT for growth?” A really good question, but unfortunately, you will not find any peer-reviewed research on the optimal time under tension. All TUT claims are merely anecdotal and have simply been promoted by popular strength coaches, leading to this belief. At present, no one, not even the most experienced exercise physiologist truly can prove what is the optimal TUT for growth, let alone prove the exact mechanism that controls muscle hypertrophy. Is it training to failure, an optimal TUT, an optimal resistance, or a specific num

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