科研之友
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摘要
Oral carbohydrate rinsing has been demonstrated to provide beneficial effects on exercise performance of durations of up to 1 hour, albeit predominately in a laboratory setting. The aim of the present study was to investigate the effects of different concentrations of carbohydrate solution mouth rinse on 5-km running performance. Fifteen healthy men (n = 9; mean +/- SD age; 42 +/- 10 years; height, 177.6 +/- 6.1 cm; body mass, 73.9 +/- 8.9 kg) and women (n = 6; mean +/- SD age, 43 +/- 9 years; height, 166.5 +/- 4.1 cm; body mass, 65.7 +/- 6.8 kg) performed a 5-km running time trial on a track on 4 separate occasions. Immediately before starting the time trial and then after each 1 km, subjects rinsed 25 ml of 0, 3, 6, or 12% maltodextrin for 10 seconds. Mouth rinsing with 0, 3, 6, or 12% maltodextrin did not have a significant effect on the time to complete the time trial (0%, 26:34 +/- 4:07 minutes: seconds; 3%, 27:17 +/- 4:33 minutes: seconds; 6%, 27:05 +/- 3:52 minutes: seconds; 12%, 26:47 +/- 4.31 minutes: seconds; p = 0.071; eta(2)(P) = 0.15), heart rate (p = 0.095; eta(2)(P) = 0.16), rating of perceived exertion (p = 0.195; eta(2)(P) = 0.11), blood glucose (p = 0.920; eta(2)(P) = 0.01), and blood lactate concentration (p = 0.831; eta(2)(P) = 0.02), with only nonsignificant trivial to small differences between concentrations. Results of this study suggest that carbohydrate mouth rinsing provides no ergogenic advantage over an acaloric placebo (0%) and that there is no dose-response relationship between carbohydrate solution concentration and 5-km track running performance.
- 出版日期2017-3
