Millard-Stafford M L, Cureton K J, Ray C A
Department of Physical Education, University of Georgia, Athens 30602.
Eur J Appl Physiol Occup Physiol. 1988;58(3):327-33. doi: 10.1007/BF00417271.
Fifteen male endurance athletes were studied to determine the effect of a glucose polymer (GP) diet supplement on physiological and perceptual responses to successive swimming, cycling and running exercise. Thirty min of swimming, cycling and running at 70% VO2max, followed by a run to exhaustion at 90% VO2max was performed after one week of training under two dietary conditions: 1) GP (230 g of GP consumed daily) and 2) placebo (P, saccharin-sweetened supplement consumed daily). During GP, daily carbohydrate (CHO) intake was higher (p less than 0.05) by 173 g or 14% of energy intake than during P, but total energy intake was not significantly different. During 90 min of exercise, CHO utilization and blood glucose were significantly higher under GP than P by an average of 20.2% and 14.5%, respectively, but heart rate, ventilation, oxygen uptake, ratings of perceived exertion, and plasma lactate were not different. Run time to exhaustion at 90% VO2max was significantly longer by 1.2 min (23%) under GP. The results suggest that a GP diet supplement may be of value during endurance exercise by increasing the availability of CHO.
对15名男性耐力运动员进行了研究，以确定葡萄糖聚合物（GP）饮食补充剂对连续游泳、骑自行车和跑步运动的生理和感知反应的影响。在两种饮食条件下进行一周训练后，进行30分钟70%最大摄氧量的游泳、骑自行车和跑步，然后进行90%最大摄氧量的力竭跑：1）GP组（每天摄入230克GP）和2）安慰剂组（P组，每天摄入糖精调味补充剂）。在GP组期间，每日碳水化合物（CHO）摄入量比P组高173克或能量摄入量的14%（p<0.05），但总能量摄入量无显著差异。在90分钟的运动中，GP组的CHO利用率和血糖分别比P组显著高20.2%和14.5%，但心率、通气量、摄氧量、主观用力感觉评分和血浆乳酸水平无差异。在GP组下，90%最大摄氧量时的力竭跑时间显著延长1.2分钟（23%）。结果表明，GP饮食补充剂在耐力运动期间可能通过增加CHO的可用性而具有价值。
