Validity of the VmaxST portable metabolic measurement system
Validity of the VmaxST portable metabolic measurement system
复制标题
DOI：
10.1080/02640410701758685
复制
发表时间：
2008-01-01
影响因子：
3.4
通讯作者：
Goodwin, Beelee
中科院分区：
文献类型：
--
作者：
Laurent, C. Matthew;Meyers, Michael C.;Goodwin, Beelee
本研究的目的是评估和比较便携式VmaxST遥测代谢测量装置与标准测量系统（Vmax 29）的有效性。30名无症状、中度活动的男性提供了书面知情同意书，并使用Vmax ST和Vmax 29代谢测量系统完成了两项最大分级跑步机运动试验（布鲁斯）。在不同的日子里以随机顺序进行测试，以获得耗尽时间、心率、收缩压和舒张压、耗氧量（VO（2））、二氧化碳产生量（VCO（2））、通气量（V（E））和呼吸交换率（RER）的峰值。多变量方差分析显示，两个系统之间的任何变量均无显著主效应（P=0.88），表明两个系统之间的测量能力相似。线性回归分析显示VO（2）（r（2）=0.99）、VCO（2）（r（2）= 0.99）、V（E）（r（2）= 0.99）和RER（r（2）=0.89）的决定系数为中到高。此外，Bland-Altman分析表明，VmaxST产生的值与Vmax 29相似，表明两种系统之间具有良好的一致性。当方法之间的差异导致95%一致性限度确定的小范围时，确认一致性。当前研究的结果证实，VmaxST是在受控实验室环境中测量运动期间代谢和生理变量的有效器械。
The aim of this study was to assess and compare the validity of the portable VmaxST telemetry metabolic measurement device with that of a standard measurement system (Vmax29). Thirty asymptomatic, moderately active males provided written, informed consent and completed two maximal graded treadmill exercise tests (Bruce) using the VmaxST and the Vmax29 metabolic measurement systems. Tests were performed in random order on separate days to obtain peak values for time to exhaustion, heart rate, systolic and diastolic blood pressure, oxygen consumption (VO(2)), carbon dioxide production (VCO(2)), ventilation (V(E)), and respiratory exchange ratio (RER). Multivariate analysis of variance revealed no significant main effect (P=0.88) between the two systems across any variable, suggesting similar measurement capabilities between the two systems. Linear regression analyses revealed moderate to high coefficients of determination for VO(2) (r(2)=0.99), VCO(2) (r(2)=0.99), V(E) (r(2)=0.99), and RER (r(2)=0.89). Furthermore, Bland-Altman analyses demonstrated that the VmaxST yielded similar values to the Vmax29, suggesting good agreement between the two systems. Agreement was confirmed when the differences between the methods resulted in a small range as identified by the 95% limits of agreement. Findings from the current study confirm that the VmaxST is a valid device for measuring metabolic and physiological variables during exercise within a controlled laboratory setting.