Layne Norton, PhD@biolayneInstagram

There is NO ‘best’ rep range for building muscle The idea that you must do 8-12 reps for muscle growth

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what it claims

There is no single optimal repetition range for muscle growth (hypertrophy); development is similar across a broad spectrum (3 to 30 repetitions) as long as effort is close to failure.

holds up

Layne Norton's assertion is supported by a solid scientific consensus in sports science. Major meta-analyses, such as that by Schoenfeld et al.

noli's read

Layne Norton's assertion is supported by a solid scientific consensus in sports science. Major meta-analyses, such as that by Schoenfeld et al. (2017, PMID: 28834797), confirm that hypertrophy is comparable across a wide range of repetitions if total volume is equated. The importance of proximity to muscular failure is also validated as a key factor, regardless of the load used (PMID: 33312275). The idea that low repetitions prioritize maximum strength while imposing higher mechanical stress on joints is well documented. Conversely, using light loads for very long sets is recognized as being more demanding in terms of local fatigue and metabolic discomfort, which may limit performance before the muscle is fully stimulated (PMID: 32401690). The creator accurately nuances these points without falling into dogmatism. In short, the literature largely supports the flexible approach advocated here.

the sources

Claimed by Layne Norton, PhD. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

What the graded evidence says

Evidence: B+

Effect: muscle hypertrophy and 1RM strength, low-load vs high-load resistance training — hypertrophy similar between low and high loads when sets taken to/near failure; 1RM strength significantly favors heavier loads
Measured on: healthy adults, trained and untrained

Light loads match heavy loads for size only when sets are taken close to failure; for pure maximal strength, heavier loads have the edge, and body-weight training eventually needs harder variations to keep progressing.

Layne Norton, PhD in the Register89 claims graded · solidity 95/100See their record →