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.
So the soleus, this wider flat muscle below the gastrocnemius of the calf, is a really unique muscle in the human body. It's 1% of the total human musculature, but it has an ability-- what will soon be for obvious reasons-- to dramatically shift fuel utilization in the body.
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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.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
And it doesn't seem like other limb movements can do this. There's something special about the soleus. It was designed, in air quotes, to be a muscle that's used repeatedly over extended hours of time and that has this unique pathway of fuel utilization.