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  • Metabolic effects of a protein-supplemented carbohydrate drink in marathon runners.

Metabolic effects of a protein-supplemented carbohydrate drink in marathon runners.

International journal of sport nutrition (1999-06-11)
P C Colombani, E Kovacs, P Frey-Rindova, W Frey, W Langhans, M Arnold, C Wenk
摘要

A field study was performed to investigate the acute influence of a milk protein hydrolysate supplemented drink (CHO+PRO) on metabolism during and after a marathon run compared to the same drink without protein (CHO). Carbohydrate metabolites and hormones were not influenced by CHO+PRO. Levels of plasma free fatty acids were significantly lower and levels of urea and most amino acids were significantly higher with CHO+PRO. Sweat urea and ammonia nitrogen excretion during the run as well as urinary 3-methylhistidine excretion during the entire exercise day was similar in both treatments. Urinary total nitrogen was significantly increased and urinary pH decreased with CHO+PRO. It was concluded that the supplemented protein was absorbed and probably at least partially oxidized during the run and that no obvious negative metabolic effects occurred. CHO+PRO did not acutely affect myofibrillar protein breakdown as assessed by the 3-methylhistidine method; however, total body protein breakdown was not measured.

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1-甲基-L-组氨酸, ≥98.0% (TLC)