Submaximal Exercise in Persons with Stroke: Test-retest Reliability and Concurrent Validity with Maximal Oxygen Consumption

Overview

Journal Arch Phys Med Rehabil

Specialty Rehabilitation Medicine

Date 2004 Feb 19

PMID 14970978

Citations 90

Authors

Janice J Eng

Andrew S Dawson

Kelly S Chu

Affiliations

Soon will be listed here.

Abstract

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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