Francis K, Culpepper M
University of Alabama, Division of Physical Therapy, Birmingham 35294.
South Med J. 1989 May;82(5):602-6. doi: 10.1097/00007611-198905000-00014.
A suitable ergometer that is generally favored for estimating maximal oxygen consumption (VO2 max) under field conditions or in environments where testing equipment is limited is the step test. Recently a mathematical model was reported to standardize the height of stepping for individuals of various heights. We designed a study to validate this model using a three-minute single-stage step test for predicting VO2 max in women. Seventeen women aged 19 to 33 performed each of three rate-specific step tests and a Bruce treadmill test. Direct measurements of VO2 max obtained from the treadmill test were correlated with the 15 second recovery heart rates after three different step tests done at stepping frequencies of 22, 26, and 30 step-ups per minute. The correlation coefficients of prediction of VO2 max from 15 second recovery pulse counts and directly measured oxygen consumption were 0.74 at 22 step-ups/min, 0.77 at 30 step-ups/min, and 0.8 at 26 step-ups/min. Each relationship was significant at the P less than .01 level. It can be concluded that the single-stage step test described in this study provides an effective predictor of VO2 max in young women and can be used when more complex methods of laboratory testing are unavailable or not feasible.
在野外条件下或测试设备有限的环境中，用于估计最大摄氧量（VO2 max）的一种普遍受青睐的合适测力计是台阶测试。最近有报道称有一个数学模型可将不同身高个体的台阶高度标准化。我们设计了一项研究，使用三分钟单阶段台阶测试来验证该模型对预测女性VO2 max的有效性。17名年龄在19至33岁的女性进行了三种特定速率的台阶测试以及一次布鲁斯跑步机测试。从跑步机测试中获得的VO2 max的直接测量值与在每分钟22次、26次和30次踏频下进行的三种不同台阶测试后15秒的恢复心率相关。从15秒恢复脉搏计数预测VO2 max与直接测量的耗氧量之间的相关系数在每分钟22次踏频时为0.74，在每分钟30次踏频时为0.77，在每分钟26次踏频时为0.8。每种关系在P小于0.01水平时均具有显著性。可以得出结论，本研究中描述的单阶段台阶测试可为年轻女性的VO2 max提供有效的预测指标，并且在无法获得或不可行更复杂的实验室测试方法时可以使用。
