When people of any age do strength exercises multiple times in a row, their muscles fire more intensely for a short while—and that’s when they get a quick boost in strength.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Aging, resistance training, and motor unit discharge behavior.

Narrative Review

2005 Jun

When people do the same strength exercise over and over in a short time, their muscles get stronger quickly — and this study shows that happens because their nerves fire faster, even in older adults.

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No contradicting evidence found

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Source Study

Aging, resistance training, and motor unit discharge behavior.

Score: 1

DOI: 10.1139/h05-126

Similar Assertions

As people get older, their muscles don't send signals as quickly when they try to move, which might be why they lose strength over time.

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Your muscles don’t fire faster when you start or stop pushing—only when you’re holding a steady push—after four weeks of strength training.

38

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Even though your nerves fire faster after training, they still respond to how hard you’re trying at the same rate—your brain’s control system didn’t get more sensitive.

38

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