Young J C
Exercise Physiology Laboratory, University of Nevada, Las Vegas 89154, USA.
Eur J Appl Physiol Occup Physiol. 1995;70(5):437-41. doi: 10.1007/BF00618495.
Prior exercise potentiates the thermic effect of a carbohydrate meal. The purpose of this study was to determine if meal size or feeding pattern influences this response. Two groups of healthy, normal-weight young women exercised for 45 min on a cycle ergometer at 70% of maximal aerobic capacity. Once aerobic capacity returned to pre-exercise baseline, the thermic effect of food (TEF) was determined by indirect calorimetry over a 2-h period. One group of subjects ingested a 2510-kJ meal and the other a 5020-kJ meal. As a control, subjects ingested the test meal without prior exercise. In addition, subjects ingesting the 5020-kJ meal were studied for an additional 2 h. In a separate trial, these subjects ingested a 5020-kJ meal in two equal portions after a bout of exercise, the second portion 120 min after the first. TEF was less for the 2510-kJ meal compared with the 5020-kJ meal for both the control [mean (SE), 76 (17) vs 158 (19) kJ.2h-1, P < 0.01), and prior exercise [124 (23) vs 197 (24) kJ.2h-1, P < 0.01) trials. However, the same increment in TEF resulted from the prior bout of exercise [48 (9) vs 40 (8) kJ.2h-1 for 2510-and 5020-kJ meals, respectively). TEF was 31% lower when the 5020-kJ meal was given in two portions compared with one [281 (30) vs 369 (41) kJ.4h-1, P < 0.05]. No difference in TEF was found between the first and second 2510-kJ portion.(ABSTRACT TRUNCATED AT 250 WORDS)
先前的运动可增强碳水化合物餐的热效应。本研究的目的是确定餐量或进食模式是否会影响这种反应。两组健康、体重正常的年轻女性在功率自行车上以最大有氧能力的70%进行了45分钟的运动。一旦有氧能力恢复到运动前的基线水平，通过间接测热法在2小时内测定食物的热效应（TEF）。一组受试者摄入了2510千焦的餐食，另一组摄入了5020千焦的餐食。作为对照，受试者在没有先前运动的情况下摄入测试餐。此外，摄入5020千焦餐食的受试者又被研究了2小时。在另一项试验中，这些受试者在一次运动后分两份等量摄入5020千焦的餐食，第二份在第一份后120分钟摄入。对于对照试验[平均值（标准误），76（17）对158（19）千焦·2小时-1，P<0.01]和先前运动试验[124（23）对197（24）千焦·2小时-1，P<0.01]，2510千焦餐食的TEF均低于5020千焦餐食。然而，先前的运动 bout导致TEF有相同的增加[2510千焦和5020千焦餐食分别为48（9）对40（8）千焦·2小时-1]。与一次性摄入相比，分两份摄入5020千焦餐食时TEF低31%[281（30）对369（41）千焦·4小时-1，P<0.05]。2510千焦餐食的第一份和第二份之间未发现TEF有差异。（摘要截断于250字）
