Rhonda Patrick· PhD
if you are training hard regardless of heavy/light, you're going to be targeting both 1 and 2-fibers.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
if you are training hard regardless of heavy/light, you're going to be targeting both 1 and 2-fibers.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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And it's been well documented that light load training does target the type-2 fibers. Which was one of the myths, it used to be taught when I was an up-and-coming sports scientist, that, if you just use light loads, you would not activate the highest threshold motor units, which are associated with these type-2 fibers, and thus you would not optimize your strength and power and hypertrophy.