Chryssanthopoulos Costas, Ziaras Christos, Oosthuyse Tanja, Lambropoulos Ioannis, Giorgios P Paradisis, Zacharogiannis Elias, Philippou Anastassios, Maridaki Maria
a School of Physical Education and Sports Science , National and Kapodistrian University of Athens , Dafni , Greece.
b School of Physiology , University of the Witwatersrand Medical School , Johannesburg , South Africa.
J Sports Sci. 2018 Apr;36(7):824-833. doi: 10.1080/02640414.2017.1344358. Epub 2017 Jul 5.
This study examined the effect of carbohydrate mouth rinsing on endurance running performance in women. Fifteen female recreational endurance runners, who used no oral contraceptives, ran two races of 1-h duration on an indoor track (216-m length) at 18:00 h after an 8-h fast with a 7-days interval between races, corresponding to the 3-10th day of each premenopausal runner's menstrual cycle, or any day for the postmenopausal runners. In a double-blind random order, participants rinsed their mouth with 25 ml of either a 6.4% carbohydrate (RCHO) or a placebo solution (RP). No fluid was ingested during exercise. Serum 17β-Εstradiol (P = 0.59) and Progesterone (P = 0.35) did not differ between treatments. There was no difference in 1-hour running performance (RCHO: 10,621.88 ± 205.98 m vs. RP: 10,454.00 ± 206.64 m; t = 1.784, P = 0.096). Furthermore, the mean percentage effect (±99%CI) of RCHO relative to RP, 1.67% (-1.1% to 4.4%), and Cohen's effect size (d = 0.21) support a trivial outcome of RCHO for total distance covered. In conclusion, carbohydrate mouth rinsing did not improve 60-min track running performance in female recreational runners competing in a low ovarian hormone condition, after an 8-h fast and when no fluid was ingested during exercise.
本研究考察了碳水化合物漱口对女性耐力跑成绩的影响。15名未使用口服避孕药的女性休闲耐力跑者，在禁食8小时后于18:00在室内跑道（长度216米）上进行两场时长1小时的跑步比赛，两场比赛间隔7天，这对应于每位绝经前跑步者月经周期的第3 - 10天，绝经后跑步者则为任意一天。参与者以双盲随机顺序用25毫升6.4%碳水化合物溶液（RCHO）或安慰剂溶液（RP）漱口。运动期间不摄入液体。各处理组之间血清17β - 雌二醇（P = 0.59）和孕酮（P = 0.35）无差异。1小时跑步成绩无差异（RCHO组：10,621.88 ± 205.98米 vs. RP组：10,454.00 ± 206.64米；t = 1.784，P = 0.096）。此外，RCHO相对于RP的平均效应百分比（±99%CI）为1.67%（-1.1%至4.4%），科恩效应量（d = 0.21）表明RCHO对总跑程的影响微不足道。总之，在低卵巢激素状态下、禁食8小时且运动期间不摄入液体的情况下，碳水化合物漱口并未改善女性休闲跑者60分钟的跑道跑步成绩。
