Glucose and insulin responses after commonly used sport feedings before and after a 1-hr training session.
This investigation examined the plasma glucose and insulin response in 6 trained athletes after consumption of four commercially available sport feedings 2 hr before as well as immediately after 1 hr of running under common training conditions. Four feedings were compared: Feeding 1, 160 g CHO/400 ml; Feeding 2, 69 g CHO/400 ml; Feeding 3, 69 g CHO + 6 g protein/400 ml; and Feeding 4, solid 69 g CHO + 5 g protein + 4 g fat. Before the training session, there were no differences between the four sport feedings in the area under the glucose and insulin curves and the insulin/glucose ratio. However, after exercise, Feeding 2 resulted in a significantly greater area under the glucose curve compared with Feedings 1, 3, and 4 (respectively, 352 vs. 241, 251, and 182) and a significantly lower insulin/glucose ratio compared with Feeding 1 (respectively, 6.2 vs. 15.8). Therefore, it is concluded that the kind of sport feeding may influence postexercise glucose and insulin responses.
Department of Nutritional Sciences and Information, N.V. Verenigde Bedrijven Nutricia, Zoetermeer, The Netherlands.
Z
Z
Hofman
H
H
Kuipers
H A
HA
Keizer
E J
EJ
Fransen
R C
RC
Servais
D000328:Adult; D001786:Blood Glucose / Q000032:analysis*; D004040:Dietary Carbohydrates / Q000592:standards*; D004041:Dietary Fats / Q000592:standards; D004044:Dietary Proteins / Q000592:standards*; D015444:Exercise / Q000502:physiology*; D005526:Food, Formulated / Q000592:standards; D006801:Humans; D007328:Insulin / Q000097:blood*; D008297:Male; D010806:Physical Education and Training; D012420:Running / Q000502:physiology; D012885:Skinfold Thickness; D013997:Time Factors
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D007328:Insulin