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.
Whereas your type-2 fibers fatigue relatively easily but they have the capacity to produce greater force. As you age, the type-1 fibers are more well preserved, whereas the type-2 fibers, there's even what's called apoptosis, which has been shown as a loss of fibers. But certainly there's a diminishment where the fibers get smaller and smaller.
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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.
Yes, aging is mostly specific...so, when I say "aging," what's called sarcopenia, which is the age-related loss of muscle is most specific to the type-2 fibers, which are your strength-related fibers.