Hoffmann J J, Loy S F, Shapiro B I, Holland G J, Vincent W J, Shaw S, Thompson D L
Exercise Physiology Laboratory, California State University, Northridge 91330.
Eur J Appl Physiol Occup Physiol. 1993;67(1):43-7. doi: 10.1007/BF00377703.
This study compared the effects of 9 weeks of run (RT) versus cycle (CT) training on ventilatory threshold (Thv) determined during treadmill (TM) and cycle ergometer (CE) graded exercise testing. Sixteen college age men were assigned to a RT or CT group and performed a TM and a CE test before and after training. Both training groups performed similar training protocols which initially consisted of continuous exercise 4 days.week-1 at 75-80% maximum heart rate (fc, max) for 45 min. Training intensity was later increased to 80-85% fc, max and interval training (90-95% fc, max) was incorporated 2 days.week-1 into the continuous training. Both groups showed significantly improved maximal oxygen consumption (VO2 max) on both TM and CE tests (P < 0.01) with no significant differences between the groups. Significant Thv increases (P < 0.05) were found on TM tests for RT (n = 8) and CT (n = 8) groups [mean (SD); 443 (438) and 373 (568) ml O2 x min-1, respectively] with no difference between the groups. Results from the CE tests revealed a significant Thv increase (P < 0.01) for the CT group [566 (663) ml O2 x min-1] with no change for the RT group. The Thv improvement noted for the RT group was significantly different (P < 0.05) comparing CE with TM tests but not for the CT group. The results indicate that CT and RT improvement in Thv for runners is dependent upon mode of training and testing, and there is an apparent dissociation of VO2 max and Thv specific to training.
本研究比较了9周跑步训练（RT）和骑行训练（CT）对在跑步机（TM）和功率自行车（CE）分级运动测试中测定的通气阈值（Thv）的影响。16名大学年龄男性被分配到RT组或CT组，并在训练前后进行了TM和CE测试。两个训练组执行相似的训练方案，最初包括每周4天、持续45分钟、强度为最大心率（fc, max）75 - 80%的持续运动。训练强度后来增加到fc, max的80 - 85%，并且每周1天将间歇训练（fc, max的90 - 95%）纳入持续训练中。两组在TM和CE测试中均显示最大摄氧量（VO2 max）显著改善（P < 0.01），组间无显著差异。在TM测试中，RT组（n = 8）和CT组（n = 8）的Thv显著增加（P < 0.05）[均值（标准差）；分别为443（438）和373（568）ml O2 x min-1]，组间无差异。CE测试结果显示CT组的Thv显著增加（P < 0.01）[566（663）ml O2 x min-1]，而RT组无变化。RT组Thv的改善在CE与TM测试比较时有显著差异（P < 0.05），但CT组没有。结果表明，跑步者Thv的CT和RT改善取决于训练和测试模式，并且存在特定于训练的VO2 max和Thv的明显分离。
