Carbohydrates offer some help in muscle protein synthesis, but not enough for the desired effect

he drink. The improved net balance in the CHO group was due primarily to a progressive decrease in muscle protein breakdown.


This study is the first to compare net muscle protein balance (protein synthesis minus breakdown) after carbohydrate ingestion with control after exercise. The principal finding was that intake of 100 grams of carbohydrates after resistance exercise improved muscle net protein balance.

The findings from this research demonstrate that carbohydrates intake alone can improve net protein balance between synthesis and breakdown. In this work, the gradual improvement in net muscle protein balance after carbohydrate intake was due principally to a progressive reduction in breakdown. However, the improvement was small compared with previous findings after intake of amino acids or amino acids and carbohydrates.

The researchers conclude that intake of carbohydrates alone after resistance exercise will modestly improve the anabolic effect of exercise. However, amino acid intake is necessary for a maximal response, one desired by most participating in resistance exercise programs.


Contact: Donna Krupa
American Physiological Society

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