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Influence of a carbohydrate-electrolyte solution ingested during running on muscle glycogen utilisation in fed humans.
Int J Sports Med. 2002 May; 23(4):279-84.IJ

Abstract

This study investigated whether the ingestion of a carbohydrate-electrolyte solution during running would influence muscle glycogen utilisation in subjects who had consumed a carbohydrate meal 3 hours before exercise. Eight men completed two 60-min treadmill runs at 70% VO(2)max. Before each run they consumed a carbohydrate meal (183 +/- 7 g) 3 hours before exercise and either 1) a carbohydrate-electrolyte solution during the run (46 +/- 1 g) (M+C), or 2) water during the run (M + W). Biopsy samples were obtained from the vastus lateralis muscle at rest and after 60 min of running. Serum insulin concentrations were higher (p < 0.01) in both trials at the start of exercise compared with fasting values, whereas blood glucose concentrations were higher (p < 0.01) after 60 min of running in the M+C trial. Pre-exercise muscle glycogen concentrations were similar in both trials (M+C: 321.9 +/- 27.2 vs M+W: 338.8 +/- 32.8 mmol x kg x dry weight (-1) [dw]; NS). There was no difference in the amount of glycogen used during exercise (M+C: 96.1 +/- 22.1 vs M+W: 77.9 +/- 11.7 mmol x kg x dw (-1); NS). In conclusion, a carbohydrate-electrolyte solution ingested during treadmill running at 70 % VO(2)max does not influence muscle glycogen use during the first hour of exercise when a carbohydrate meal is consumed 3 hours before exercise.

Authors+Show Affiliations

Human Muscle Metabolism Research Group, Department of Physical Education, Sports Science and Recreation Management, Loughborough University, Loughborough, UK.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

12015629

Citation

Chryssanthopoulos, C, et al. "Influence of a Carbohydrate-electrolyte Solution Ingested During Running On Muscle Glycogen Utilisation in Fed Humans." International Journal of Sports Medicine, vol. 23, no. 4, 2002, pp. 279-84.
Chryssanthopoulos C, Williams C, Nowitz A. Influence of a carbohydrate-electrolyte solution ingested during running on muscle glycogen utilisation in fed humans. Int J Sports Med. 2002;23(4):279-84.
Chryssanthopoulos, C., Williams, C., & Nowitz, A. (2002). Influence of a carbohydrate-electrolyte solution ingested during running on muscle glycogen utilisation in fed humans. International Journal of Sports Medicine, 23(4), 279-84.
Chryssanthopoulos C, Williams C, Nowitz A. Influence of a Carbohydrate-electrolyte Solution Ingested During Running On Muscle Glycogen Utilisation in Fed Humans. Int J Sports Med. 2002;23(4):279-84. PubMed PMID: 12015629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of a carbohydrate-electrolyte solution ingested during running on muscle glycogen utilisation in fed humans. AU - Chryssanthopoulos,C, AU - Williams,C, AU - Nowitz,A, PY - 2002/5/17/pubmed PY - 2002/7/12/medline PY - 2002/5/17/entrez SP - 279 EP - 84 JF - International journal of sports medicine JO - Int J Sports Med VL - 23 IS - 4 N2 - This study investigated whether the ingestion of a carbohydrate-electrolyte solution during running would influence muscle glycogen utilisation in subjects who had consumed a carbohydrate meal 3 hours before exercise. Eight men completed two 60-min treadmill runs at 70% VO(2)max. Before each run they consumed a carbohydrate meal (183 +/- 7 g) 3 hours before exercise and either 1) a carbohydrate-electrolyte solution during the run (46 +/- 1 g) (M+C), or 2) water during the run (M + W). Biopsy samples were obtained from the vastus lateralis muscle at rest and after 60 min of running. Serum insulin concentrations were higher (p < 0.01) in both trials at the start of exercise compared with fasting values, whereas blood glucose concentrations were higher (p < 0.01) after 60 min of running in the M+C trial. Pre-exercise muscle glycogen concentrations were similar in both trials (M+C: 321.9 +/- 27.2 vs M+W: 338.8 +/- 32.8 mmol x kg x dry weight (-1) [dw]; NS). There was no difference in the amount of glycogen used during exercise (M+C: 96.1 +/- 22.1 vs M+W: 77.9 +/- 11.7 mmol x kg x dw (-1); NS). In conclusion, a carbohydrate-electrolyte solution ingested during treadmill running at 70 % VO(2)max does not influence muscle glycogen use during the first hour of exercise when a carbohydrate meal is consumed 3 hours before exercise. SN - 0172-4622 UR - https://www.unboundmedicine.com/medline/citation/12015629/Influence_of_a_carbohydrate_electrolyte_solution_ingested_during_running_on_muscle_glycogen_utilisation_in_fed_humans_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2002-29078 DB - PRIME DP - Unbound Medicine ER -