中风患者的次最大运动：重测信度及与最大耗氧量的同时效度
Submaximal exercise in persons with stroke: test-retest reliability and concurrent validity with maximal oxygen consumption.
作者信息
Eng Janice J, Dawson Andrew S, Chu Kelly S
机构信息
School of Rehabilitation Sciences, University of British Columbia, Vancouver, Canada.
出版信息
Arch Phys Med Rehabil. 2004 Jan;85(1):113-8. doi: 10.1016/s0003-9993(03)00436-2.
OBJECTIVE
To establish the test-retest reliability and concurrent validity with maximum oxygen consumption (VO2max) for 3 submaximal exercise tests in persons with chronic stroke: (1) submaximal treadmill test, (2) submaximal cycle ergometer test, and (3) 6-minute walk test (6MWT).
DESIGN
Prospective study using a convenience sample.
SETTING
Free-standing tertiary rehabilitation center.
PARTICIPANTS
A volunteer sample of 12 community-dwelling individuals who had a stroke with moderate motor deficits.
INTERVENTIONS
Not applicable.
MAIN OUTCOME MEASURES
Heart rate, blood pressure, and oxygen consumption (VO2) were assessed during the exercise tests.
RESULTS
Test-retest reliability was good to excellent for the exercise tests (maximal and submaximal tests). VO2 for all submaximal measures related to VO2max (r range, .66-.80). Neither the 6MWT distance, self-selected gait speed, nor hemodynamic measures related to VO2max.
CONCLUSION
The VO2 measures of the submaximal exercise tests had excellent reliability and good concurrent validity with VO2max. Submaximal exercise tests may be a method by which to monitor the effects of interventions after a screening test (eg, symptom-limited graded exercise test, dobutamine stress echocardiograph).
目的
确定慢性卒中患者进行3种次最大运动试验时的重测信度以及与最大摄氧量（VO₂max）的同时效度，这3种试验分别为：（1）次最大平板运动试验，（2）次最大蹬车运动试验，以及（3）6分钟步行试验（6MWT）。
设计
采用便利抽样的前瞻性研究。
地点
独立的三级康复中心。
参与者
12名有中度运动功能缺损的社区居住性卒中患者的志愿者样本。
干预措施
不适用。
主要观察指标
运动试验期间评估心率、血压和摄氧量（VO₂）。
结果
运动试验（最大和次最大试验）的重测信度良好至优秀。所有次最大测量指标的VO₂与VO₂max相关（r范围为0.66 - 0.80）。6MWT距离、自我选择的步态速度以及血流动力学指标均与VO₂max无关。
结论
次最大运动试验的VO₂测量具有出色的信度以及与VO₂max良好的同时效度。次最大运动试验可能是一种在筛查试验（如症状限制性分级运动试验、多巴酚丁胺负荷超声心动图）后监测干预效果的方法。
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