Chiron François, Thomas Claire, Bardin Joffrey, Mullie Florence, Bennett Samuel, Chéradame Jérémy, Caliz Laurine, Hanon Christine, Tiollier Eve
LBEPS, Univ Evry, IRBA, Université de Paris-Saclay, Evry, France.
French Federation of Athletics (FFA), Paris, France.
J Hum Kinet. 2024 May 17;93:105-117. doi: 10.5114/jhk/182986. eCollection 2024 Jul.
During high-intensity (HI) exercise, metabolic acidosis significantly impairs exercise performance. Increasing the body's buffering capacity through training and exogenous intake of alkalizing supplements may improve high-intensity performance. Manipulating water and diet intake may influence the acid-base balance. The aim of this study was to determine the effects of mineral water rich in bicarbonate ions (STY) or placebo water (PLA) on circulating biomarkers and anaerobic performance and to verify whether alkalizing (ALK) or acidizing (ACI) diet would modulate these effects. Twenty-four athletes, assigned either to ALK (n = 12) or ACI (n = 12) diet for four weeks, completed a 1-min rowing Wingate Test in a double-blind and randomized trial after one week of daily hydration (1.5 to 2L/d) with either STY or PLA. Blood samples were taken before and after each test, and urine samples were collected each week. Chronic consumption of bicarbonate-rich water significantly impacted resting urinary pH irrespective of alkalizing or acidizing dietary intake. STY induced a significant increase in blood pH, lactate, and HCO ion concentration post-exercise compared to PLA. Similar changes were observed when STY was associated with the ALK diet. In contrast, STY combined with the ACI diet only significantly affected urine pH and peak blood lactate compared to PLA (p < 0.05). No effect of bicarbonate-rich water was reported on anaerobic performance (p > 0.05). Our results suggest that consumption of bicarbonate-rich water alters acid-base balance during a warm-up and after HI exercise, could potentiate beneficial effects of an alkalizing diet on the acid-base balance after HI exercise, and reduces the acid load induced by an acidifying diet.
在高强度（HI）运动期间，代谢性酸中毒会显著损害运动表现。通过训练和外源性摄入碱性补充剂来提高身体的缓冲能力，可能会改善高强度运动表现。控制水和饮食摄入可能会影响酸碱平衡。本研究的目的是确定富含碳酸氢根离子的矿泉水（STY）或安慰剂水（PLA）对循环生物标志物和无氧运动表现的影响，并验证碱性（ALK）或酸性（ACI）饮食是否会调节这些影响。24名运动员被分配到ALK组（n = 12）或ACI组（n = 12），进行为期四周的饮食干预，在每天饮用STY或PLA（1.5至2升/天）一周后，以双盲随机试验的方式完成1分钟的划船温盖特测试。在每次测试前后采集血样，每周收集尿样。无论碱性或酸性饮食摄入情况如何，长期饮用富含碳酸氢根的水都会显著影响静息尿pH值。与PLA相比，STY在运动后可显著提高血液pH值、乳酸和HCO₃⁻离子浓度。当STY与ALK饮食联合时，也观察到了类似的变化。相比之下，与PLA相比，STY与ACI饮食联合仅显著影响尿pH值和血乳酸峰值（p < 0.05）。未发现富含碳酸氢根的水对无氧运动表现有影响（p > 0.05）。我们的结果表明，饮用富含碳酸氢根的水会在热身期间和HI运动后改变酸碱平衡，可能会增强碱性饮食对HI运动后酸碱平衡的有益影响，并减少酸性饮食引起的酸负荷。
