ABSTRACT

The 2-minute step test (2MST) requires minimal resources and is valid in adults older than 60 years. Here we investigate if the 2MST can be used to estimate peak oxygen consumption (VO₂peak) in healthy middle-aged adults (40–59 years old). Thirty-six participants completed the 2MST and a maximal graded treadmill test with breath-by-breath gas analysis. Outcome measures included the number of steps completed in the 2MST, VO₂peak (ml/kg/min), waist circumference (cm), resting blood pressure (mmHg) and body mass index (kg/m²). Data were analyzed using Pearson correlation coefficients and multivariate linear regression analyses. There was a moderate relationship between 2MST peak steps completed and VO₂peak (r = .54, p = .001). The 2MST model, including 2MST peak steps, height and waist circumference, predicted VO₂peak with r = .80 (p < .001). The 2MST may be a good predictor of VO₂peak in healthy middle-aged adults, and may be suitable for primary health-care settings and large-scale epidemiological studies.

Trial registration: Australian New Zealand Clinical Trials Registry (ANZCTR): ACTRN12617000091303, http://www.ANZCTR.org.au/ACTRN12617000091303.aspx, date registered: 17 January 2017.

摘要

2 分钟阶梯测试 (2MST) 所需资源最少，适用于 60 岁以上的成年人。在这里，我们调查 2MST 是否可用于估计健康中年人（40-59 岁）的峰值耗氧量（VO ₂峰值）。36 名参与者完成了 2MST 和带呼吸气体分析的最大分级跑步机测试。结果测量包括在 2MST 中完成的步骤数、VO ₂峰值 (ml/kg/min)、腰围 (cm)、静息血压 (mmHg) 和体重指数 (kg/m ² )。使用 Pearson 相关系数和多元线性回归分析对数据进行分析。完成的 2MST 峰值步骤与 VO ₂峰值之间存在中等关系（r= .54，p = .001）。2MST 模型，包括 2MST 峰值步长、身高和腰围，预测 VO ₂峰值，r = .80 ( p < .001)。2MST 可能是健康中年人VO ₂峰值的良好预测指标，可能适用于初级卫生保健机构和大规模流行病学研究。

试验注册：澳大利亚新西兰临床试验注册中心 (ANZCTR)：ACTRN12617000091303，http://www.ANZCTR.org.au/ACTRN12617000091303.aspx，注册日期：2017 年 1 月 17 日。