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标题：Effects of Sodium Bicarbonate Ingestion during an Intermittent Exercise on Blood Lactate, Stroke Parameters, and Performance of Swimmers
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作者：Eduardo Zapaterra Campos ; Eduardo Zapaterra Campos ; Eduardo Bernardo Sangali 等
期刊名称：Journal of exercise physiology online
印刷版ISSN：1097-9751
出版年度：2012
卷号：15
期号：6
页码：84-92
语种：English
出版社：American Society of Exercise Physiologists
摘要：Campos EZ, Sangali EB, Gerosa Neto J, Gobbi RB, Freitas Junior IF, Papoti M. Effects of Sodium Bicarbonate Ingestion during an Intermittent Exercise on Blood Lactate, Stroke Parameters, and Performance of Swimmers. JEPonline 2012;15(6):84-92. The purpose of this study was to investigate the effects of sodium bicarbonate (NaHCO3) ingestion in high intensity intermittent exercise on blood lactate ([La- ]), stroke parameters, and performance of swimmers. Ten swimmers completed six maximal front crawl efforts of 100 m interspaced by 6 min of rest in both situations: NaHCO3 (SB) and dextrose (placebo). The SB (0.3 g·kg-1 of body mass) or the placebo was ingested 60 min before the training in gelatin capsules. After each effort, the rating of perceived exertion (RPE) was assessed and blood sample was collected. Stroke length (SL), stroke rate (SR), and stroke index (SI) were measured. All parameters were compared using twoway repeated measures ANOVA, followed by Tukey post-hoc test. The significance was set at 5%. The [La- ] in the sixth effort after SB (17.93 ± 3.8 mmol·l -1 ) supplementation was significantly higher than placebo [La- ] (15.67 ± 3.29 mmol·l -1 ) (P<0.05). No difference was found between SB and placebo for the time·100 m -1 of any of the six swims. Neither stroke parameters (SL, SF, and SI) nor RPE were significantly different in all swim efforts. In conclusion, NaHCO3 did not improve performance in swimming training, but did enhance the glycolytic source without alteration of RPE.
关键词：Swimming;Sodium Bicarbonate Supplementation;Rating of Perceived Exertion;Exercise