A cheap pantry-style compound just improved 10K times in recreational women runners, and the stomach-upset problem that usually ruins it barely showed up. In a double-blind crossover trial, 21 women ran about 32 seconds faster after sodium bicarbonate. The trick was pairing it with a carb-rich meal 90 minutes before the run. Here's the dose, the timing, who it fits, and who should think twice.
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