| The effect of two types of diet with high and low glycemic index on the immune and hormonal response of male athletes after intense endurance activity |
| Paper ID : 1078-SSRC-13TH (R2) |
| Authors |
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Sayed Javad Ziaolhagh1, Maliheh Ardakani-zadeh *2 12. Department of exercise physiology, Shahrood branch, Islamic azadi university, Semnan, Iran 2Department of sport sciences, Faculty of human sciences, Damghan University, Semnan, Iran |
| Abstract |
| Purpose: Carbohydrate ingestion during prolonged strenuous exercise attenuates the leukocytosis and subsequent neutrophilia and lymphopenia by maintaining plasma glucose concentration and minimizing stress hormone and inflammatory cytokines responses. The purpose of this study was to determine the effect of pre-exercise high carbohydrate meals with high glycemic index (HGI) or low glycemic index (LGI) on blood leukocyte redistribution during subsequent endurance exercise. Methods: The 24 male (age 24.8 ± 0.35 yrs, body mass 76.1 ± 3.5 kg, height 1.77 ± 0.02 m, body fat percentage 11.1 ± 3.23, VO2 max 51.18 ± 0.65 ml/ kg/ min) performed two 90 min runs on a treadmill at 70 % VO2 max two hours after ingesting a high glycemic index or low glycemic index meal. Each isocaloric test meal contained 1 g/ kg body mass of carbohydrate and the glycemic index values were 94 and 40, respectively. Trials were separated by at least 7 days in counterbalanced order. Results were analyzed using a two way ANOVA with post hoc Bonferoni comparison as appropriate (p<0.05). Results: Plasma glucose concentrations were significantly higher in LGI than HGI immediately after exercise. However, there were no significant differences in circulating leukocyte and neutrophil counts, plasma cortisol, interleukin-6 concentrations between trials. Conclusion: Ingestion of a LGI meal 2 h before sub maximal exercise maintains plasma glucose concentration during subsequent exercise when compared with ingestion of a HGI meal. However, it seems to have limited effects on circulating leukocyte and neutrophil counts, circulating stress hormone and cytokine responses to exercise. |
| Keywords |
| High Glycemic Index, Low Glycemic Index, leukocyte redistribution, cortisol, interleukin-6 |
| Status: Abstract Accepted (Poster Presentation) |
