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Metabolic responses to high protein intake in Korean elite bodybuilder with intensive resistant exercise
Author(s) -
Kim Hyerang,
Lee San In Gun,
Choue Ryowon
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.740.29
Subject(s) - metabolic acidosis , medicine , creatinine , calcium , excretion , endocrinology , potassium , chemistry , urea , phosphorus , sodium , zoology , biochemistry , biology , organic chemistry
High protein consumption can cause metabolic acidosis, which affects nitrogen and calcium balance. However, the effects of high protein consumption on metabolic homeostasis in athletes participating in intensive exercise training have not been fully determined. This study investigated the metabolic response to high protein consumption in Korean elite bodybuilders. They consumed excessively high amounts of protein (4.3 ± 1.2 g/kg BW/day) and high amounts of calorie (5,621.7 ± 1,354.7 kcal/day), as well as more than the recommended amounts of calcium, phosphorus, sodium, and potassium. Serum levels of creatinine (1.3 ± 0.1 mg/dl) and potassium (5.9 ± 0.8 mmol/L), and urinary levels of urea nitrogen (24.7 ± 9.5 mg/dl), creatinine (2.3 ± 0.7 mg/dl), calcium (0.3 ± 0.1 mg/dl), and phosphorus (1.3 ± 0.4 mg/dl) were observed to be higher than the normal reference ranges. It is considered that high urinary excretion of nitrogen and minerals were due to high consumption of those nutrients and high rate of muscle turnover rather than the results of metabolic acidosis. The results of this study suggest that resistance exercise along with an increased consumption of calcium and potassium might reduce or offset the negative effects of the protein‐generated acid load. Therefore, the metabolic response to counter high protein consumption might be dependent on the intensity of exercise and the level of mineral intake. Further studies will be needed to determine the effects of a high‐protein diet on systemic acid‐base balance and also to ascertain the safety and efficiency of protein intake in athletes. Grant Funding Source: Nutrition (ASN)