Fluid provision and metabolic responses to soccer-specific exercise.
The present study aimed to investigate the impact on metabolism of altering the timing and volume of ingested carbohydrate during soccer-specific exercise. Twelve soccer players performed a soccer-specific protocol on three occasions. On two, 7 ml kg(-1) carbohydrate-electrolyte or placebo were ingested at 0 and 45 min. On a third, the same total volume of carbohydrate-electrolyte was consumed but at 0, 15, 30, 45, 60 and 75 min. Carbohydrate-electrolyte ingestion increased blood glucose, insulin and carbohydrate oxidation, whilst suppressing NEFA, glycerol and fat oxidation (P < 0.05) although manipulating the schedule of carbohydrate ingestion elicited similar metabolic responses (P > 0.05). However, consuming fluid in small volumes reduced the sensation of gut fullness (P < 0.05). The results demonstrated that when the total volume of carbohydrate consumed is equal, manipulating the timing and volume of ingestion elicits similar metabolic responses. Furthermore, consuming a small volume of fluid at regular intervals reduces the sensation of gut fullness.
Clarke
N D
ND
Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Henry Cotton Campus, 15-21 Webster Street, Liverpool L3 2ET, UK. n.d.clarke@ljmu.ac.uk
Drust
B
B
Maclaren
D P M
DP
Reilly
T
T
D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D003681:Dehydration / Q000378:metabolism / Q000503:physiopathology; D004040:Dietary Carbohydrates / Q000378:metabolism*; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005221:Fatigue / Q000378:metabolism / Q000503:physiopathology; D005223:Fats / Q000378:metabolism; D005230:Fatty Acids, Nonesterified / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism; D006801:Humans; D007328:Insulin / Q000097:blood; D008297:Male; D010084:Oxidation-Reduction; D012527:Satiation / Q000502:physiology; D012916:Soccer / Q000502:physiology*; D014882:Water-Electrolyte Balance / Q000502:physiology*
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D005223:Fats; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D005990:Glycerol
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