Improved recovery from prolonged exercise following the consumption of low glycemic index carbohydrate meals.
This study examined the effects of the glycemic index (GI) of post-exercise carbohydrate (CHO) intake on endurance capacity the following day. Nine active males participated in 2 trials. On day 1, subjects ran for 90 min at 70% VO(2max)(R1). Thereafter, they were supplied with either a high GI (HGI) or low GI (LGI) CHO diet which provided 8 g CHO/kg body mass (BM). On day 2, after an overnight fast, subjects ran to exhaustion at 70% VO(2max)(R2). Time to exhaustion during R2 was longer in the LGI trial (108.9 +/- 7.4 min) than in the HGI trial (96.9 +/- 4.8 min) (P < 0.05). Fat oxidation rates and free fatty acid concentrations were higher in the LGI trial than the HGI trial (P < 0.05). The results suggest that the increased endurance capacity was largely a consequence of the increased fat oxidation following the LGI recovery diet.
Stevenson
Emma
E
Sport and Exercise Nutrition Research Group, School of Sport and Exercise Sciences, Loughborough University, Leicestershire, UK.
Williams
Clyde
C
McComb
Gareth
G
Oram
Christopher
C
D000273:Adipose Tissue / Q000378:metabolism*; D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D018592:Cross-Over Studies; D004040:Dietary Carbohydrates / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D015444:Exercise / Q000502:physiology*; D005232:Fatty Acids, Volatile / Q000097:blood; D038321:Glycemic Index / Q000502:physiology*; D006801:Humans; D008297:Male; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D005232:Fatty Acids, Volatile