Wert David M, VanSwearingen Jessie M, Perera Subashan, Brach Jennifer S
Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA.
J Aging Phys Act. 2015 Jul;23(3):346-51. doi: 10.1123/japa.2013-0268. Epub 2014 Jul 8.
The purpose of this study was to assess the relative and absolute reliability of metabolic measures of energy expenditure and gait speed during overground walking in older adults with mobility limitations. Thirty-three (mean age [SD] = 76.4 [6.6] years; 66% female) older adults with slow gait participated. Measures of energy expenditure and gait speed were recorded during two 6-min bouts of overground walking (1 week apart) at a self-selected "usual" walking pace. The relative reliability for all variables was excellent: ICC = .81-.91. Mean differences for five of the six outcome variables was less than or equal to the respected SEM, while all six mean differences fell below the calculated MDC95. Clinicians and researchers can be confident that metabolic measures of energy expenditure and gait speed in older adults with slow walking speeds can be reliably assessed during overground walking, providing an alternative to traditional treadmill assessments.
本研究的目的是评估行动不便的老年人在地面行走过程中能量消耗的代谢指标和步速的相对可靠性与绝对可靠性。33名步态缓慢的老年人（平均年龄[标准差]=76.4[6.6]岁；66%为女性）参与了研究。在两次6分钟的地面行走（间隔1周）过程中，以自我选择的“平常”步行速度记录能量消耗和步速指标。所有变量的相对可靠性都极佳：组内相关系数（ICC）=0.81 - 0.91。六个结果变量中有五个的平均差异小于或等于相应的标准误，而所有六个平均差异均低于计算出的95%最小可检测变化值（MDC95）。临床医生和研究人员可以确信，在地面行走过程中，可以可靠地评估行走速度缓慢的老年人的能量消耗代谢指标和步速，这为传统的跑步机评估提供了一种替代方法。
