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A new mouse study reframes the molecule behind your burning legs as a messenger, not a metabolic leftover — and hints at why intense training keeps outperforming easy cardio on the metrics that matter.
A new narrative review suggests the intensity of your training — not just whether you sweat — may sculpt the gut bugs that govern metabolism. The evidence is early, but intriguing.
A small Duke pilot is reuniting people from a 15-year-old exercise trial to ask a question longevity culture keeps dodging: does the same workout still work as we age?
Two new trials reframe exercise as a habit-engineering problem — one nudging dementia caregivers to walk every hour, the other asking which workouts actually extend healthspan.