The Claim

Muscle hypertrophy can be induced through both active muscular contractions and passive stretching, as long as sufficient mechanical tension is applied to the muscle fibers, irrespective of the type of contraction.

Source: Cut out the BS. Do THIS to build muscle [3 New Studies]

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
52score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
2 studies reviewed
In plain English

You can grow muscle not just by lifting weights, but also by stretching—just as long as the muscle feels enough tension, no matter how it's created.

See the scientific wording

Muscle hypertrophy can be stimulated by both active contractions and passive stretching, provided sufficient mechanical tension is applied to the muscle fibers regardless of contraction type.

What the research says

2 studies

  1. Study: Influence of 8-weeks of supervised static stretching or resistance training of pectoral major muscles on maximal strength, muscle thickness and range of motion

    The study found that simply stretching muscles regularly can make them grow just as much as lifting weights, as long as the stretch is intense enough — which supports the idea that tension, not just effort, drives muscle growth.

  2. Study: Efficacy of passive repetitive stretching of skeletal muscle on myofiber hypertrophy and genetic suppression on MAFbx, MuRF1, and myostatin

    The study shows that just stretching muscles, without making them contract, can make them grow bigger in mice. This supports the idea that tension alone, not just exercise, can build muscle.

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Read analysis

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.