“...Time is the fire in which we burn.” -Delmore Schwartz

🪡 🧵 thread about #lactate oxidation and metabolic heat 🔥. /1

frontiersin.org/articles/10.33… The story begins at least ~300k years ago when early modern humans first appear on the scene. As detailed in @HermanPontzer’s Burn (2021), humans are the best endurance athletes among the living apes:

VO2max >4x that of chimps
⬆️proportion of “slow twitch” skm fibers

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