Doing a new type of strength exercise that stretches your biceps a lot can cause temporary muscle damage and soreness in women, and these effects can last up to four days.

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Pro

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Against

Evidence from Studies

Supporting (1)

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Community contributions welcome

39

The effects of concentric and eccentric exercise performed at long muscle length on muscle damage

Randomized Controlled Trial

Human

2025 Dec

The study looked at a specific arm exercise done at long muscle lengths in women, and found it caused muscle damage that lasted up to four days, just like the claim says.

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

The effects of concentric and eccentric exercise performed at long muscle length on muscle damage

Score: 39

DOI: 10.1080/02640414.2025.2577034

Similar Assertions

Doing certain types of hard arm exercises that lengthen the muscle while it's working can make your arms weaker and less flexible within a day.

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77%

When women do certain types of arm exercises that involve stretching the muscle while contracting it, they tend to feel more soreness and their muscles get thicker — probably because of inflammation and fluid buildup.

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77%

Doing super-slow, lengthening muscle exercises (like lowering a heavy weight) causes more muscle damage than shortening ones, and you can see it on an ultrasound of your arm muscles.

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39

75%