Effect of acute sodium bicarbonate ingestion on anaerobic performance and fatigue indexes during high-intensity anaerobic training

Sodium bicarbonate ingestion prior to vigorous exercise can delay the onset of muscular fatigue and maintain performance during high-intensity exercise. This study aimed to investigate sodium bicarbonate supplementation s effect on anaerobic performance and fatigue indexes during a repeated bout of high-intensity anaerobic power test in athlete men.Eleven healthy male participants (۲۲.۸ ± ۳ years; ۷۸.۹ ± ۱۰.۷ kg) were randomly assigned to either the ۰.۳ g/kg sodium bicarbonate group (SB) or the placebo group (PLa) in randomized counter balanced, single-blinded sessions. Both groups completed three bouts (۳ × ۳۰s) of Wingate anaerobic tests (WAnT), with ۲ min recovery intervals. The SB ingested a grape-flavored solution containing ۰.۳ g/kg sodium bicarbonate at ۶۰min pre-exercise, and PLa ingested a similar amount of sodium bicarbonate-free flavored beverage. Peak power (PP), mean power (MP), fatigue indexes including the rate of perceived exertion (RPE), and perceived pain index (PPI) were recorded.The result showed fatigue indexes have significantly improved in the SB group compared to PLa (P≤۰/۰۵), and also significant differences were found among the group compared to each bout test (P≥۰/۰۵). There were no significant improvements in the outcomes of the PP and AP between SB and PLa groups throw tests. The only index that significantly improved with SB was the AP in the second and third bout compared to the first bout of the repeated Wingate test (p<۰.۰۵).Conclusions: Sodium bicarbonate supplementation significantly increased time to reaching fatigue and muscle pain but had no effect on anaerobic peak or average power during repeated Wingate cycling tests in healthy young adults. These data suggest that supplementation sodium bicarbonate at the level of ۰.۳ g/kg before high-intensity anaerobic training enhances the anaerobic performance, improves the time-to-exhaustion, and increases the threshold of perceived exertion and muscle pain following repeated anaerobic exercises.

کلیدواژه ها:

Anaerobic ، cycle ergometry ، Fatigue ، repeatability