An abundant supply of amino acids enhances the metabolic effect of exercise on muscle protein
We conclude that the stimulatory effect of exogenous amino acids on muscle protein synthesis is enhanced by prior exercise, perhaps in part because of enhanced blood flow. Our results imply that protein intake immediately after exercise may be more anabolic than when ingested at some later time.
Read the full text here: https://doi.org/10.1152/ajpendo.1997.273.1.E122
G. Biolo, K. D. Tipton, S. Klein, and R. R. Wolfe. An abundant supply of amino acids enhances the metabolic effect of exercise on muscle protein. American Journal of Physiology-Endocrinology and Metabolism 1997 273:1, E122-E129