Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration

John A. Carrithers, David L. Williamson, IV, Philip M. Gallagher, Michael P. Godard, Kimberley E. Schulze, Scott W. Trappe

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The purpose of this investigation was to determine the effects of postexercise eucaloric carbohydrate-protein feedings on muscle glycogen restoration after an exhaustive cycle ergometer exercise bout. Seven male collegiate cyclists [age = 25.6 ± 1.3 yr, height = 180.9 ± 3.2 cm, wt = 75.4 ± 4.0 kg, peak oxygen uptake (V̇o(2peak)) = 4.20 ± 0.2 l/min] performed three trials, each separated by 1 wk: 1) 100% α-D-glucose [carbohydrate (CHO)], 2) 70% carbohydrate-20% protein (PRO)-10% fat, and 3) 86% carbohydrate-14% amino acid (AA). All feedings were eucaloric, based on 1.0 g · kg body wt-1 · h-1 of CHO, and administered every 30 min during a 4-h muscle glycogen restoration period in an 18% wt/vol solution. Muscle biopsies were obtained immediately and 4 h after exercise. Blood samples were drawn immediately after the exercise bout and every 0.5 h for 4 h during the restoration period. Increases in muscle glycogen concentrations for the three feedings (CHO, CHO-PRO, CHO-AA) were 118 mmol/kg dry wt; however, no differences among the feedings were apparent. The serum glucose and insulin responses did not differ throughout the restoration period among the three feedings. These results suggest that muscle glycogen restoration does not appear to be enhanced with the addition of proteins or amino acids to an eucaloric CHO feeding after exhaustive cycle exercise.

Original languageEnglish (US)
Pages (from-to)1976-1982
Number of pages7
JournalJournal of applied physiology
Volume88
Issue number6
StatePublished - Jul 25 2000

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Glycogen
Carbohydrates
Muscles
Proteins
Amino Acids
Glucose
Fats
Insulin
Oxygen
Biopsy
Serum

All Science Journal Classification (ASJC) codes

  • Physiology
  • Physiology (medical)

Cite this

Carrithers, J. A., Williamson, IV, D. L., Gallagher, P. M., Godard, M. P., Schulze, K. E., & Trappe, S. W. (2000). Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration. Journal of applied physiology, 88(6), 1976-1982.
Carrithers, John A. ; Williamson, IV, David L. ; Gallagher, Philip M. ; Godard, Michael P. ; Schulze, Kimberley E. ; Trappe, Scott W. / Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration. In: Journal of applied physiology. 2000 ; Vol. 88, No. 6. pp. 1976-1982.
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Carrithers, JA, Williamson, IV, DL, Gallagher, PM, Godard, MP, Schulze, KE & Trappe, SW 2000, 'Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration', Journal of applied physiology, vol. 88, no. 6, pp. 1976-1982.

Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration. / Carrithers, John A.; Williamson, IV, David L.; Gallagher, Philip M.; Godard, Michael P.; Schulze, Kimberley E.; Trappe, Scott W.

In: Journal of applied physiology, Vol. 88, No. 6, 25.07.2000, p. 1976-1982.

Research output: Contribution to journalArticle

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Carrithers JA, Williamson, IV DL, Gallagher PM, Godard MP, Schulze KE, Trappe SW. Effects of postexercise carbohydrate-protein feedings on muscle glycogen restoration. Journal of applied physiology. 2000 Jul 25;88(6):1976-1982.