McBride Chris, Boy Tara, Green Matt, O'Neal Eric, Renfroe Lee
Department of Athletics, Southeastern Louisiana University, Hammond, LA, USA.
Department of Kinesiology, University of North Alabama, Florence, AL, USA.
Int J Exerc Sci. 2020 Dec 1;13(2):1476-1486. doi: 10.70252/KJFQ3498. eCollection 2020.
This study compared hydration efficiency of a carbohydrate-protein (CHO-PRO) beverage consumed in a bolus (BOL) vs. a metered (MET) drinking pattern during recovery from exercise induced hypohydration. Participants ( = 10) lost 2 - 2.5% of body mass from sweating during a morning exercise session. Participants were then assigned to either consume a carbohydrate/electrolyte/protein beverage in a bolus (BOL) or metered incremental consumption (MET) (counterbalanced) pattern post exercise. Total rehydration beverage administered during recovery equaled 125% of fluid lost during exercise. BOL was administered within the first hour of recovery, MET was administered 25% during the first 30 min, then 12.5% every 30 min for the next 4 hours. Mean (±SD) intake was 2475 ± 324 mL (MET) and 2525 ± 293 mL (BOL) ( = 0.22). Mean urine production was significantly greater for BOL (1167 ml ± 293 ml) than MET (730 ml ± 324 ml) ( = 0.003). Hydration efficiency (fluid ingested vs. fluid retained as percent) was significantly greater for MET (69.1 ± 15.4) than BOL (53.7 ± 9.7) ( = 0.004). Results indicate that, across a ~ 6-hour recovery, a metered drinking pattern improves fluid retention and therefore, hydration efficiency when a carbohydrate-protein beverage is consumed. More research is needed in paradigms characterized by unlimited fluid availability.
本研究比较了在运动引起的低水合状态恢复期间，以一次性大量饮用（BOL）与定量饮用（MET）模式摄入碳水化合物-蛋白质（CHO-PRO）饮料的水合效率。参与者（n = 10）在早晨的运动过程中因出汗而体重减轻了2%-2.5%。然后，参与者被分配以一次性大量饮用（BOL）或定量递增摄入（MET）（平衡）模式在运动后饮用碳水化合物/电解质/蛋白质饮料。恢复期间给予的总补液饮料量等于运动期间流失液体量的125%。BOL在恢复的第一小时内给予，MET在前30分钟内给予25%，然后在接下来的4小时内每30分钟给予12.5%。平均（±标准差）摄入量为2475±324毫升（MET）和2525±293毫升（BOL）（p = 0.22）。BOL组的平均尿量（1167毫升±293毫升）显著高于MET组（730毫升±324毫升）（p = 0.003）。MET组的水合效率（摄入液体与保留液体的百分比）（69.1±15.4）显著高于BOL组（53.7±9.7）（p = 0.004）。结果表明，在约6小时的恢复过程中，当饮用碳水化合物-蛋白质饮料时，定量饮用模式可提高液体保留率，从而提高水合效率。在液体供应不受限制的范式中，还需要更多的研究。
