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Anthony Colpo’s Substack
Anthony Colpo’s Substack
"Time Under Tension": The World's Dumbest & Most Useless Training Principle?
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"Time Under Tension": The World's Dumbest & Most Useless Training Principle?

The art of the bamboozle: How to turn a load of nonsense into a revered training principle.

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Anthony Colpo
Jun 16, 2025
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Anthony Colpo’s Substack
Anthony Colpo’s Substack
"Time Under Tension": The World's Dumbest & Most Useless Training Principle?
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Ever since the mid-1990s, bodybuilding and strength authors have been banging on about the importance of “time under tension” (TUT). Increase TUT, they claim, and you will increase muscle and strength gains.

But what on Earth are they talking about? Do they themselves even know?

Ladies and gentlemen, today we’re going to take a closer look at the TUT phenomenon, and discover why it may just be the most useless training principle of all time.

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