Effect of Sodium Bicarbonate and Glycogen Depletion on 1500n1 Time Trials

Cycling - Physiological aspects;Glycogen - Metabolism;Sodium bicarbonate - Physiological effect

Behr, LauraFoster, C. ;

University of Wisconsin

关键词: Cycling - Physiological aspects;    Glycogen - Metabolism;    Sodium bicarbonate - Physiological effect;   

Others  :  https://minds.wisconsin.edu/bitstream/handle/1793/48642/Obehrlaura2002.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: University of Wisconsin

【 摘 要 】

Previous studies have demonstrated the importance of anaerobic capacity toperformance during high intensity exercise. Competitive cyclists/skaters (N =9) performed three randomly ordered control (C), sodium bicarbonate (SB),glycogen depletion (GD) 1500m cycling time trials. Power output wasrecorded using a strain gauge interfaced with a windload simulator attached toa racing bicycle. VO2 was measured by open circuit spirometry. Power outputand V02 were linked based on steady state exercise completed before thetrials. Repeated measures ANOVA analyzed the outcomes. The GD trial tooksignificantly longer than the C or SB trials ((333.96, SB133.49, &GD137.73~p) < .05. Mean total and anaerobic power output during the last200m segment was significantly greater in SB compared to GD (C42879,SB44956 & GD40642 J), and (C20189, SB22194 & GD18741 J), but not foraerobic work (C22683, SB22762 & GD21901 J). The results support thehypothesis of augmenting anaerobic capacity during the sodium bicarbonatetrial and reducing anaerobic capacity with glycogen depletion.