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Lactic acid has been framed
The burn in hard workouts is real, but the blamed molecule is a fuel your body recycles, and next-day soreness arrives hours too late for t…
Health & Fitness
Bodies, habits, medicine, and maintenance
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Ten thousand steps was a product name, not a threshold
Fitness's most famous number came from a 1960s Japanese pedometer, and the studies that finally tested it found the curve flattens well bef…