A comparison of the effects of milk and a carbohydrate-electrolyte drink on the restoration of fluid balance and exercise capacity in a hot, humid environment
A comparison of the effects of milk and a carbohydrate-electrolyte drink on the restoration of fluid balance and exercise capacity in a hot, humid environment
复制标题
DOI：
10.1007/s00421-008-0809-4
复制
发表时间：
2008-11-01
影响因子：
3
通讯作者：
Shirreffs, Susan M.
中科院分区：
文献类型：
--
作者：
Watson, Phillip;Love, Thomas D.;Shirreffs, Susan M.
在炎热的间歇性运动导致体重下降2.0%/-0.1%之后，7名男性志愿者摄入了相当于体重下降150%的碳水化合物-电解质溶液(CE)或脱脂牛奶(M)。在3h恢复期结束时，受试者在试验M(191+/-162毫升)上基本上处于正液体平衡，在试验CE(-135+/-392毫升)上，尽管在两个试验中都处于负钠平衡，在试验CE上处于负钾平衡。326m L+/-354m L或0.4%体质量的差异有统计学意义(P=0.051)。在CE和M试验中，受试者分别摄入137+/-15克和113+/-12克CHO，在M试验中摄入75+/-8克蛋白质。在3h恢复期结束时，在热(35.3+/-0.5℃)、湿(63+/-2%)条件下，在61%VO2峰值下完成运动能力测试。试验M的心率(P=0.020)和直肠温度(P=0.045)较高，但运动至力竭的时间差异无统计学意义(CE试验和M试验分别为39.6±7.3min和39.7±8.1min)。目前的研究结果表明，牛奶可以作为运动后补充水分的有效饮料，受试者在整个恢复期保持净正液体平衡。尽管脱脂牛奶对体液保留有影响，但运动后4小时，脱脂牛奶和市售碳水化合物-电解质饮料的运动能力并无差别。
Following a 2.0 +/- 0.1% body mass loss induced by intermittent exercise in the heat, seven male volunteers ingested either a carbohydrate-electrolyte solution (CE) or skimmed milk (M) in a volume equal to 150% of body mass loss. At the end of the 3 h recovery period, subjects were essentially in positive fluid balance on trial M (191 +/- 162 mL), and euhydrated on trial CE (-135 +/- 392 mL) despite being in negative sodium balance on both trials and negative potassium balance on trial CE. This difference of 326 +/- 354 mL or 0.4% body mass approached significance (P = 0.051). Subjects ingested 137 +/- 15 and 113 +/- 12 g of CHO during the CE and M trials, respectively, as well as 75 +/- 8 g of protein during the M trial. At the end of the 3 h recovery period, an exercise capacity test was completed at 61% VO2peak in warm (35.3 +/- 0.5 degrees C), humid (63 +/- 2%) conditions. HR (P = 0.020) and rectal temperature (P = 0.045) were higher on trial M, but no difference in exercise time to exhaustion was observed between trials (39.6 +/- 7.3 min vs. 39.7 +/- 8.1 min on trials CE and M, respectively). The results of the present study suggest that milk can be an effective post-exercise rehydration drink, with subjects remaining in net positive fluid balance throughout the recovery period. Despite the effect on fluid retention, exercise capacity was not different between skimmed milk and a commercially available carbohydrate-electrolyte drink 4 h following exercise/heat-induced body mass loss.