The effect of different dosing strategies of sodium bicarbonate upon collegiate swimmers

Sodium bicarbonate - Physiological effect;Swimming - Physiological aspects

Bowman, Steven A.McBride, T. ;

University of Wisconsin

关键词: Sodium bicarbonate - Physiological effect;    Swimming - Physiological aspects;   

Others  :  https://minds.wisconsin.edu/bitstream/handle/1793/48658/Obowmansteven2002.PDF?sequence=1&isAllowed=y

瑞士|英语

来源: University of Wisconsin

【 摘 要 】

This study evaluated the efficacy of different dosages of sodium bicarbonate on time trialperformance, blood lactate concentrations and incurred side effects. Participants included10 volunteer male (n = 3) and female (n = 7) members of the University of Wisconsin-LaCrosse swimming team. The participants were divided into groups by in-seasonspecialization of 100 yards, 200 yards or 400 yards. Each participant completed a timetrial under a control condition, and under 0.1 g/kg body weight, 0.2 g/kg body weight and0.3 g/kg body weight. Blood lactate was collected before and after the time trial. Sideeffects were recorded every 10 minutes from consumption to 20 minutes post trial.Performance times were all significantly faster under the experimental conditions vs.control (p = 0.001). The 0.1 g/kg body weight produced the fastest time (97% of thecontrol time), then 0.2 g/kg body weight (98.19% of the control time) and 0.3 g/kg bodyweight (99.10% of the control time). Pre and post-trial lactate values all increasedproportionately with the dosage of sodium bicarbonate and were significantly higher. thanthe control values in both pre-trial (p = 0.02) and post-trial (p = 0.001). Side effects weresimilar in type and frequency under the 0.1 g/kg body weight (7) and 0.2 g/kg bodyweight (10) conditions, however they increased in severity under the 0.3 g/kg bodyweight (27) condition. The findings suggest that bicarbonate loading is effective even atlower dosages, however, as the dosage increases, side effects can impede any ergogeniceffect. Reduced water consumption during dosing may help to avoid gastro-intestinal sideeffects.