Int J Sports Med 2003; 24(6): 452-458
DOI: 10.1055/s-2003-41181
Nutrition
© Georg Thieme Verlag Stuttgart · New York

Effect of Carbohydrate Feeding During Recovery from Prolonged Running on Muscle Glycogen Metabolism During Subsequent Exercise

K.  Tsintzas1 , C.  Williams1 , L.  Boobis2 , S.  Symington1 , J.  Moorehouse1 , P.  Garcia-Roves1 , C.  Nicholas1
  • 1Human Muscle Metabolism Research Group, Loughborough University, Loughborough, UK
  • 2Sunderland Royal General Hospital, Sunderland SR4 7TP, UK
Further Information

Publication History

Accepted after revision: October 25, 2002

Publication Date:
07 August 2003 (online)

Abstract

This study examined the effect of carbohydrate (CHO) intake during a 4 h recovery from prolonged running on muscle glycogen metabolism during subsequent exercise. On 2 occasions, 7 male subjects ran for 90 min at 70 % maximum oxygen uptake (V˙O2max) on a motorized treadmill (R1) followed by a 4 h rest period (REC) and a 15 min run (R2) consisting of 5 min at 60 % and 10 min at 70 % V˙O2max. During REC, each subject ingested a total of 2.7 l of an isotonic solution containing either 50 g of CHO (LOW) or 175 g of CHO (HIGH). Biopsy samples were obtained from the vastus lateralis immediately after R1, REC and R2. During REC, a higher muscle glycogen resynthesis was observed in HIGH when compared with LOW trial (75 ± 20 vs. 31 ± 11 mmol × kg dry matter (dm)-1, respectively; p < 0.01). Muscle glycogen utilization during R2 was similar between the HIGH and LOW trials (39 ± 10 vs. 46 ± 11 mmol × kg dm-1, respectively). These results suggest that ingestion of a large amount of CHO at frequent intervals during recovery from exercise does not affect the rate of muscle glycogen utilization during subsequent exercise.

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Prof. C. Williams

School of Sport & Exercise Sciences · Loughborough University

Loughborough, Leics · LE11 3TU · UK ·

Phone: 01509-226309

Fax: 01509-226300

Email: C.Williams@lboro.ac.uk

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