Effect of glucose supplement timing on protein metabolism after resistance training

B. D. Roy 1 , M. A. Tarnopolsky 1 , 2 , J. D. Macdougall 1 , J. Fowles 1 , and K. E. Yarasheski 3 1  Department of Kinesiology and 2  Department of Neurology and Physical Medicine and Rehabilitation, McMaster University, Hamilton, Ontario, Canada L8S 4K1; and 3  Metabolism Division, Washington Unive...

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Published in:Journal of applied physiology (1985) 1997-06, Vol.82 (6), p.1882-1888
Main Authors: Roy, B. D, Tarnopolsky, M. A, Macdougall, J. D, Fowles, J, Yarasheski, K. E
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Blood Glucose - analysis
Creatinine - urine
Fundamental and applied biological sciences. Psychology
Glucose - administration & dosage
Glucose - pharmacology
Humans
Intermediate and energetic metabolism
Keto Acids - blood
Male
Metabolisms and neurohumoral controls
Muscle Proteins - metabolism
Physical Fitness
Space life sciences
Time Factors
Vertebrates: anatomy and physiology, studies on body, several organs or systems
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Summary:B. D. Roy 1 , M. A. Tarnopolsky 1 , 2 , J. D. Macdougall 1 , J. Fowles 1 , and K. E. Yarasheski 3 1  Department of Kinesiology and 2  Department of Neurology and Physical Medicine and Rehabilitation, McMaster University, Hamilton, Ontario, Canada L8S 4K1; and 3  Metabolism Division, Washington University School of Medicine, St. Louis, Missouri 63110 Received 16 September 1996; accepted in final form 10 February 1997. Roy, B. D., M. A. Tarnopolsky, J. D. MacDougall, J. Fowles, and K. E. Yarasheski. Effect of glucose supplement timing on protein metabolism after resistance training. J. Appl. Physiol. 82(6): 1882-1888, 1997. We determined the effect of the timing of glucose supplementation on fractional muscle protein synthetic rate (FSR), urinary urea excretion, and whole body and myofibrillar protein degradation after resistance exercise. Eight healthy men performed unilateral knee extensor exercise (8 sets/~10 repetitions/~85% of 1 single maximal repetition). They received a carbohydrate (CHO) supplement (1 g/kg) or placebo (Pl) immediately ( t  = 0 h) and 1 h ( t  = +1 h) postexercise. FSR was determined for exercised (Ex) and control (Con) limbs by incremental L -[1- 13 C]leucine enrichment into the vastus lateralis over ~10 h postexercise. Insulin was greater ( P  
ISSN:8750-7587
1522-1601
DOI:10.1152/jappl.1997.82.6.1882