Frey G C, Byrnes W C, Mazzeo R S
Department of Kinesiology, University of Colorado, Boulder 80309.
Metabolism. 1993 Jul;42(7):822-8. doi: 10.1016/0026-0495(93)90053-q.
This study investigated the effects of blood lactate and norepinephrine levels and rectal temperature on excess postexercise oxygen consumption (EPOC) following two different exercise intensities. Six trained and seven untrained women each performed two exercise tests, short-term high-intensity exercise ([HI] approximately 80% maximum oxygen consumption [VO2max]) and long-term low-intensity exercise ([LOW] approximately 65% VO2max) until 300 kcal were expended. Rectal temperature, oxygen consumption (VO2), and lactate and norepinephrine levels were monitored at rest, during exercise, and for 60 minutes into recovery. Exercise times averaged 30.0 +/- 4.5 and 23.7 +/- 0.9 minutes in trained women and 45 +/- 3.6 and 30.0 +/- 0.4 minutes in untrained women for LOW and HI, respectively. Rectal temperature, VO2, and lactate and norepinephrine levels were significantly elevated (P < .05) during HI compared with LOW in both groups. VO2 was elevated throughout recovery following LOW and HI in untrained women only. Additionally, VO2 was elevated until minutes 50 and 40 following LOW and HI, respectively, in trained subjects. Rectal temperature returned to resting levels after 30 minutes of recovery following LOW, but remained significantly elevated throughout minute 50 of recovery following HI in trained women. However, values remained significantly elevated throughout recovery following both exercise bouts in untrained subjects. Norepinephrine levels remained elevated above resting levels throughout recovery following HI and until minute 50 following LOW in trained subjects, whereas levels remained elevated for 5 minutes following LOW and 50 minutes following HI in untrained subjects. Lactate levels remained elevated above baseline values throughout recovery following HI and LOW in both groups.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究调查了两种不同运动强度后，血乳酸、去甲肾上腺素水平和直肠温度对运动后过量氧耗（EPOC）的影响。六名受过训练的女性和七名未受过训练的女性分别进行了两项运动测试，即短期高强度运动（[HI]约为最大耗氧量[VO2max]的80%）和长期低强度运动（[LOW]约为VO2max的65%），直至消耗300千卡热量。在休息时、运动期间以及恢复的60分钟内监测直肠温度、耗氧量（VO2）、乳酸和去甲肾上腺素水平。在低强度和高强度运动中，受过训练的女性运动时间平均分别为30.0±4.5分钟和23.7±0.9分钟，未受过训练的女性运动时间平均分别为45±3.6分钟和30.0±0.4分钟。与低强度运动相比，两组在高强度运动期间直肠温度、VO2、乳酸和去甲肾上腺素水平均显著升高（P<0.05）。仅在未受过训练的女性中，低强度和高强度运动后恢复期间VO2均升高。此外，在受过训练的受试者中，低强度和高强度运动后VO2分别在第50分钟和第40分钟前一直升高。低强度运动后30分钟恢复时直肠温度恢复到静息水平，但在受过训练的女性中，高强度运动后恢复的第50分钟内直肠温度仍显著升高。然而，在未受过训练的受试者中，两次运动后恢复期间数值均显著升高。在受过训练的受试者中，高强度运动后恢复期间去甲肾上腺素水平一直高于静息水平，低强度运动后直至第50分钟；而在未受过训练的受试者中，低强度运动后5分钟和高强度运动后50分钟去甲肾上腺素水平一直升高。两组在高强度和低强度运动后恢复期间乳酸水平均高于基线值。（摘要截选至250字）
