Do light and heavy loads grow different muscle fibre types when sets are taken to failure?
Oct 27
5 min read
A popular programming idea says that light, high-repetition sets preferentially grow your slow-twitch (type I) muscle fibres while heavy sets grow your fast-twitch (type II) fibres, so you should train both ways to develop the whole muscle. It is a neat theory. The question is whether muscle biopsies from training studies actually show it.
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