v1

causal

Analysis v1

Supported

Lifting heavy weights with fewer reps and longer breaks builds more muscle and strength than lifting lighter weights with more reps and shorter breaks in men who already work out.

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Pro

46

Against

Evidence from Studies

Supporting (1)

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Community contributions welcome

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The effect of training volume and intensity on improvements in muscular strength and size in resistance-trained men

Randomized Controlled Trial

Human

2015 Aug

The study found that lifting heavier weights with longer rest periods led to bigger muscle and strength gains than lifting lighter weights with shorter rest periods, exactly as the claim stated.

Contradicting (1)

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Community contributions welcome

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Effects of High-Volume Versus High-Load Resistance Training on Skeletal Muscle Growth and Molecular Adaptations

Randomized Controlled Trial

Human

2022

The study found that high-volume training made muscles bigger, while high-intensity training made them stronger, but the claim says high-intensity training does both better—so the study contradicts the claim.

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.

Similar Assertions

Lifting very heavy weights a few times with long breaks builds more muscle and strength faster than lifting lighter weights many times with short breaks, when the total amount of lifting isn't the same.

47

1

96%

Lifting heavy weights with fewer reps and longer breaks makes your arms stronger and bigger faster than doing more reps with lighter weights and shorter breaks, especially for guys who already work out.

47

0

86%

Lifting more weights each week makes you stronger, but the extra strength you gain from each additional set gets smaller faster than the muscle gains do.

48

0

84%

Lifting heavy weights for just a few reps makes untrained young men much stronger than doing more reps with lighter weights, especially after 8 weeks of training.

32

0

82%

If you're a young guy lifting weights more often each week, you'll build more muscle and get stronger—but after a while, your strength stops improving fast, while your muscles keep growing a bit longer.

48

0

82%