Stamford B A
Eur J Appl Physiol Occup Physiol. 1976 Jun 21;35(2):89-93. doi: 10.1007/BF02333798.
Ten male subjects performed five maximal treadmill running tests at 7 mph. Tests included two (test-retest) progressive, step increment (2 1/2% grade elevation), discontinuous tests (DCT); a progressive, step increment, continuous test (ct) and two constant load tests (CL and CL +2 1/2%). A DCT test was performed first for establishment of peak elevation levels as constant load tests were performed at the peak elevation level attained (CL) and at a level 2 1/2% higher (CL + 2 1/2%). The second DCT test and the remaining three tests were administered randomly. Peak preformance capability (operationally defined as duration at highest grade elevation) was markedly reduced during progressive tests as compared with constant load tests. There was a similar reduction in peak performance capability during the CT test as compared with DCT test. Maximal oxygen uptake (VO2max) was quite similar among the various tests. It was concluded that VO2max attained during progressive, step increment, tests is unaffected by cumulative submaximal work. Discontinuous and continuous progressive tests provide similar VO2max results.
十名男性受试者以每小时7英里的速度进行了五次最大强度的跑步机跑步测试。测试包括两次（重测）渐进式、逐步递增（坡度提升2.5%）、不连续测试（DCT）；一次渐进式、逐步递增、连续测试（ct）以及两次恒定负荷测试（CL和CL + 2.5%）。首先进行一次DCT测试以确定峰值提升水平，因为恒定负荷测试是在达到的峰值提升水平（CL）以及高2.5%的水平（CL + 2.5%）下进行的。第二次DCT测试以及其余三次测试是随机进行的。与恒定负荷测试相比，渐进式测试期间的峰值表现能力（在操作上定义为最高坡度提升时的持续时间）明显降低。与DCT测试相比，CT测试期间的峰值表现能力也有类似程度的降低。在各种测试中，最大摄氧量（VO2max）相当相似。得出的结论是，在渐进式、逐步递增测试中达到的VO2max不受累积次最大工作量的影响。不连续和连续渐进式测试提供相似的VO2max结果。
