Lift in the evening, then fast for eight hours: does that hurt recovery? A 2012 study gave 16 young men 40 g of casein 30 minutes before bed and tracked what happened overnight. The protein was digested and absorbed during sleep, whole-body protein synthesis jumped (311 vs 246 µmol/kg), and net protein balance flipped from negative to positive. Muscle protein synthesis was about 22% higher, though only borderline significant. Here is what the findings mean, what they don't, and how to use them.
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