The Combined Effects of Protein Intake and Resistance Training on Serum Osteocalcin Concentrations in Strength and Power Athletes

• Autores: Jie Kang
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 21, Nº. 4, 2007, págs. 1197-1203
• Idioma: inglés
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• Resumen

  • Ratamess, N.A., J.R. Hoffman, A.D. Faigenbaum, G.T. Mangine, M.J. Falvo, and J. Kang. The combined effects of protein intake and resistance training on serum osteocalcin concentrations in strength and power athletes. J. Strength Cond. Res. 21(4):1197-1203. 2007.-The purpose of the present investigation was to examine the combined effects of protein intake and resistance training on a blood marker of bone osteogenesis, serum osteocalcin, in Division III football players. Thirty-three resistance-trained football players (age = 20.4 ± 1.8 years; height = 180.9 ± 7.0 cm; body mass = 97.2 ± 12.6 kg) were evaluated on their protein intake and subsequently underwent 10 weeks of periodized heavy resistance training during the off season. Subjects were then placed into 1 of the following 3 groups based on relative protein intake and were instructed to maintain their diets throughout the experimental period: (a) low protein intake (<1.2 g per kilogram of body mass), (b) moderate protein intake (1.21 to 1.90 g per kilogram of body mass), or (c) high protein intake (>1.91 g per kilogram of body mass). Blood sampling occurred prior to and following the 10-week resistance training period to determine resting serum osteocalcin concentrations. A significant main effect was observed following training such that only the group who consumed <1.2 g per kilogram of body mass of protein shown significant elevations in serum osteocalcin in response to resistance training (26.8 ± 6.4 to 33.4 ± 6.6 ng·ml?1). In addition, absolute protein intake was significantly correlated to serum osteocalcin concentrations (r = 0.39). The results of the present investigation demonstrated relationships between protein intake and serum osteocalcin concentrations. In addition, the osteocalcin response to short-term resistance training appeared to be affected by protein intake.