International journal of sports physiology and performance · 2025
Individual and Combined Effects of Sodium Bicarbonate and Sodium Citrate Supplementation on High-Intensity Exercise Performance in Highly Trained Female CrossFit Athletes.
СтатьяРандомизированное исследованиеНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Martin Robyn A X J, Yang Xiaolin, McNaughton Lars R
Аннотация
PURPOSE: This study compared the ingestion of a matched dose (0.3 g·kg-1 BM) of enteric-coated sodium bicarbonate (SB), sodium citrate (SC), and both combined (SBC) on high-intensity exercise performance using a time-to-peak ingestion strategy.
METHODS: Ten trained female CrossFit athletes completed four 6-km cycling time trials after consuming either SB, SC, SBC, or a placebo (PLA) in enteric-coated capsules. Blood acid-base balance was measured preingestion, preexercise, and postexercise.
RESULTS: Preexercise blood [HCO3-] was significantly higher in the SB trial compared with the SC (+2.3 [1.8] mmol·L-1, P = .003, g = 1.2) and PLA (+6.5 [1.1 mmol·L-1, P < .0005, g = 2.5) trial. Performance time was faster with SB trials when compared with SC (-11.6 [8.0] s, P = .01), SBC (-17.2 [9.1] s, P = .001), and PLA (-21.5 [14.5] s, P = .007), with no significant difference between SC (mean difference [MD] = 9.9 s, P = .94) and SBC (MD = 4.3, P = 1.0) when compared with PLA. Blood lactate concentration was significantly greater in the SB trial compared with the placebo (MD = 2.4 [2.8] mmol·L-1, P < .001). Preexercise gastrointestinal symptom scores were higher with SB when compared to PLA (MD = 2.4 [3.2] arbitrary units, P = .04) and SC (MD = 2.2 [2.7], P = .032).
CONCLUSION: Ingestion of 0.3 g·kg-1 BM of SB improved extracellular buffering capacity when compared with SC and PLA, allowing exercise performance improvements.
METHODS: Ten trained female CrossFit athletes completed four 6-km cycling time trials after consuming either SB, SC, SBC, or a placebo (PLA) in enteric-coated capsules. Blood acid-base balance was measured preingestion, preexercise, and postexercise.
RESULTS: Preexercise blood [HCO3-] was significantly higher in the SB trial compared with the SC (+2.3 [1.8] mmol·L-1, P = .003, g = 1.2) and PLA (+6.5 [1.1 mmol·L-1, P < .0005, g = 2.5) trial. Performance time was faster with SB trials when compared with SC (-11.6 [8.0] s, P = .01), SBC (-17.2 [9.1] s, P = .001), and PLA (-21.5 [14.5] s, P = .007), with no significant difference between SC (mean difference [MD] = 9.9 s, P = .94) and SBC (MD = 4.3, P = 1.0) when compared with PLA. Blood lactate concentration was significantly greater in the SB trial compared with the placebo (MD = 2.4 [2.8] mmol·L-1, P < .001). Preexercise gastrointestinal symptom scores were higher with SB when compared to PLA (MD = 2.4 [3.2] arbitrary units, P = .04) and SC (MD = 2.2 [2.7], P = .032).
CONCLUSION: Ingestion of 0.3 g·kg-1 BM of SB improved extracellular buffering capacity when compared with SC and PLA, allowing exercise performance improvements.