Lambert C P, Costill D L, McConell G K, Benedict M A, Lambert G P, Robergs R A, Fink W J
Human Performance Laboratory, Ball State University, Muncie, Indiana 47306.
Int J Sports Med. 1992 May;13(4):285-92. doi: 10.1055/s-2007-1021268.
This investigation evaluated the effects of beverage carbonation and carbohydrate (CHO) content on fluid replacement following exercise/thermal dehydration. On four occasions separated by at least 7 days, eight healthy men cycled at 50% of VO2max in a hot environmental chamber (40 degrees C, 40% relative humidity) until a weight loss of 4.12 +/- 0.22% was attained. In the subsequent four hours, subjects ingested one of four solutions at 15-min intervals. The total volume ingested equalled that lost during dehydration. The solutions were administered in randomized order and varied in their carbonation and carbohydrate (CHO) content: 1. CK: carbonated 10% glucose-fructose solution, 2. NCK: non-carbonated 10% glucose-fructose solution, 3. CNK: carbonated non-caloric solution, and 4. NCNK: non-carbonated non-caloric solution. Plasma volume changes, total plasma protein concentration, plasma osmolality, and the plasma glucose concentration were determined at rest before and after dehydration, and at 30, 90, 150, and 240 min of recovery. Plasma volume changes and the plasma protein concentration were not different (p greater than 0.05) between treatments. Values for the plasma glucose concentration and the change in plasma osmolality were significantly elevated when CHO beverages were ingested when compared with non-CHO beverage ingestion. Five-min cycling bouts were performed at 70% of VO2max before and after dehydration and at 60, 120, 180, and 240 min of rehydration. The respiratory exchange ratio was elevated in both of the CHO treatments when compared with both of the non-CHO treatments at 60, 120, 180 and 240 min of rehydration.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究评估了饮料的碳酸化程度和碳水化合物（CHO）含量对运动/热脱水后补液的影响。八名健康男性在炎热环境舱（40摄氏度，相对湿度40%）中以最大摄氧量（VO2max）的50%进行骑行，每次骑行至少间隔7天，直至体重减轻4.12±0.22%。在随后的四个小时内，受试者每隔15分钟摄入四种溶液中的一种。摄入的溶液总体积与脱水过程中损失的体积相等。这些溶液按照随机顺序给予，其碳酸化程度和碳水化合物（CHO）含量各不相同：1. CK：碳酸化的10%葡萄糖-果糖溶液；2. NCK：非碳酸化的10%葡萄糖-果糖溶液；3. CNK：碳酸化的无热量溶液；4. NCNK：非碳酸化的无热量溶液。在脱水前后的静息状态以及恢复后的30、90、150和240分钟时，测定血浆容量变化、血浆总蛋白浓度、血浆渗透压和血浆葡萄糖浓度。各处理之间的血浆容量变化和血浆蛋白浓度无差异（p>0.05）。与摄入非CHO饮料相比，摄入含CHO饮料时血浆葡萄糖浓度值和血浆渗透压变化显著升高。在脱水前后以及补液的60、120、180和240分钟时，以VO2max的70%进行5分钟的骑行测试。在补液的60、120、180和240分钟时，与两种非CHO处理相比，两种含CHO处理的呼吸交换率均升高。（摘要截断于250字）
