A lot of workout studies don’t have enough participants to notice small but real muscle gains in people who already lift weights, so their results might be confusing or wrong.

71

Pro

0

Against

Evidence from Studies

Supporting (1)

71

Community contributions welcome

71

The effects of lengthened-partial range of motion resistance training of the limbs on arm and thigh muscle cross-sectional area

Randomized Controlled Trial

Human

This study used a lot of people and careful methods to see if two types of weight training make different muscle gains in trained people — and found almost no difference. That proves how hard it is to spot small benefits, which is exactly what the claim says: many studies are too weak to tell if one workout is better than another.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

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 lengthened-partial range of motion resistance training of the limbs on arm and thigh muscle cross-sectional area

Score: 71

DOI: 10.51224/SRXIV.485

Similar Assertions

Doing your workouts more often per week doesn’t seem to help you build more muscle, as long as the total amount of lifting stays the same.

48

0

81%

The muscle growth seen here — about 2% — is about what you’d expect from 10 weeks of regular weightlifting, based on other studies.

66

0

79%

Most of the research on how much to lift and how often was done on young men who already train—so we don’t know if the same rules apply to women, older people, or beginners.

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48

79%

When people who already work out build muscle, they don’t get much bigger very fast, and the gains slow down over time—so to tell if one workout plan is better than another, you’d need to study a lot of people.

71

0

79%

If you want to get stronger, doing your workouts more often helps—more than if you just want to get bigger muscles.

48

0

79%