Does muscle fibre growth predict whole-muscle growth after resistance training?
Oct 27
4 min read
Hypertrophy research measures growth in very different ways: fibre size from a biopsy, muscle thickness or cross-sectional area from ultrasound or MRI, lean mass from a body scan. It is easy to assume these all move together, so that bigger fibres simply mean a bigger muscle. The evidence says the link is weaker than that, which matters for how you read studies and how you judge your own progress.
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