Department of Sport and Exercise Science, The University of Auckland, Level 3, Building 734.319, 261 Morrin Road, Glen Innes, Auckland Private Bag 92019, Auckland 1142, New Zealand.
Percept Mot Skills. 2011 Feb;112(1):183-92. doi: 10.2466/06.15.27.PMS.112.1.183-192.
The purpose of this study was to develop an accurate metabolic equation for estimating steady-state oxygen consumption (VO2) during submaximal NuStep exercise. Adults (N = 40; M age = 64.0 yr., SD = 6.5; M height = 170.1 cm, SD = 9.1; M weight = 85.7 kg, SD = 19.9) performed two randomized testing sessions. Each session consisted of six stages with combinations of four workloads (1, 3, 5, and 7) at 3 cadences (60, 80, and 100 steps/min.). Multiple regression analysis to predict steady-state VO2 from NuStep workload (W), NuStep steps/min., and subject body mass resulted in the following model (R2 = .73): Steady-state VO2 = 3.5 + 0.016 (W* steps/min.) + 0.092 (steps/min.) - 0.053 (weight). The standard error of the estimate and total error for the prediction of steady-state VO2 under all NuStep workload conditions were 2.3 mL/kg/min. and 2.4 mL/kg/ min., respectively. The standard error of the estimate and total error values are similar to those previously reported in the literature regarding the accuracy of metabolic equations for other exercise modalities. These findings support the use of the equation developed to predict steady-state VO2 for NuStep exercise in older adult clientele.
本研究旨在开发一种准确的代谢方程，用于估计 NuStep 亚极量运动时的稳态耗氧量（VO2）。成年人（N=40；M 年龄=64.0 岁，SD=6.5；M 身高=170.1cm，SD=9.1；M 体重=85.7kg，SD=19.9）进行了两次随机测试。每个测试包含 6 个阶段，每个阶段由 4 种负荷（1、3、5 和 7）与 3 种踏频（60、80 和 100 步/分钟）的组合组成。多元回归分析表明，NuStep 负荷（W）、NuStep 步/min. 和受试者体重可以预测稳态 VO2，得出以下模型（R2=0.73）：稳态 VO2=3.5+0.016（W*步/min.）+0.092（步/min.）-0.053（体重）。所有 NuStep 负荷条件下稳态 VO2 预测的估计标准误差和总误差分别为 2.3mL/kg/min.和 2.4mL/kg/min.。这些估计值和总误差值与文献中报道的其他运动方式代谢方程的准确性相当。这些发现支持使用所开发的方程来预测 NuStep 运动中的稳态 VO2，适用于老年人群。
