McCarthy D A, Macdonald I A, Shaker H A, Hart P, Georgiannos S, Deeks J, Wade A J
School of Biological Sciences, Queen Mary and Westfield College, London, UK.
Eur J Appl Physiol Occup Physiol. 1992;64(6):518-22. doi: 10.1007/BF00843761.
Twelve healthy male volunteers exercised at 200 W on a cycle ergometer for 8 min or until exhausted, if sooner. Retrospectively, subjects fell into two groups. During the last minute of exercise at 200 W, those in group 1 (n = 5) had a mean respiratory exchange ratio (R) of 1.06 (SD 0.01) and were working at a mean of 79% (SD 4%) of their maximum oxygen consumption (VO2max) as measured in a separate incremental load test. For subjects in group 2 (n = 7), R was 1.31 (SD 0.08) and their VO2 was maximal (mean 101%. SD 3%). Plasma lactate, and adrenaline concentrations rose to higher levels during exercise in subjects in group 2 than in those in group 1. At the finish of exercise, the leucocyte count and the plasma lactate concentration immediately began to fall in subjects in group 1 whereas in group 2 subjects both rose for several minutes before falling. Plasma catecholamine concentrations fell rapidly in both groups during recovery.
12名健康男性志愿者在功率自行车上以200瓦的功率运动8分钟，若提前力竭则运动至力竭。回顾性分析时，受试者分为两组。在200瓦运动的最后一分钟，第1组（n = 5）的平均呼吸交换率（R）为1.06（标准差0.01），其工作强度平均为在单独递增负荷测试中测得的最大耗氧量（VO2max）的79%（标准差4%）。对于第2组（n = 7）的受试者，R为1.31（标准差0.08），且其VO2达到最大值（平均101%，标准差3%）。与第1组受试者相比，第2组受试者运动期间血浆乳酸和肾上腺素浓度升至更高水平。运动结束时，第1组受试者的白细胞计数和血浆乳酸浓度立即开始下降，而第2组受试者这两项指标在下降前均上升了几分钟。恢复期间两组的血浆儿茶酚胺浓度均迅速下降。
