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Submaximal exercise in persons with stroke: test-retest reliability and concurrent validity with maximal oxygen consumption. | LitMetric
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).
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