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Validity and reliability of the 6-min step test in individuals with coronary artery disease

Cristiane de Fátima Travensolo1, Juliano Ferreira Arcuri2, Marcos Doederlein Polito1

  • 1Physical Education Department, Londrina State University, Londrina, Brazil.

Physiotherapy Research International : the Journal for Researchers and Clinicians in Physical Therapy
|October 11, 2019
PubMed

Insights

The 6-minute step test (6MST) reliably measures functional capacity in coronary artery disease (CAD) patients. It is a valid alternative to the 6-minute walk test (6MWT) for assessing exercise tolerance in this population.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Rehabilitation

Background:

  • Coronary artery disease (CAD) significantly impacts functional capacity.
  • Accurate assessment of functional capacity is crucial for managing CAD patients.
  • The 6-minute walk test (6MWT) is a common measure, but alternatives are being explored.

Purpose of the Study:

  • To evaluate the reliability and validity of the 6-minute step test (6MST) in individuals with CAD.
  • To compare the 6MST with the established 6-minute walk test (6MWT).

Main Methods:

  • A randomized crossover design was employed with 35 CAD patients.
  • Participants performed two 6MSTs and two 6MWTs.
  • Test-retest reliability and correlation between tests were analyzed.

Main Results:

  • The 6MST demonstrated excellent test-retest reliability (ICC = 0.967).
  • A slight increase in steps was observed between the first and second 6MST.
  • Strong correlations were found between 6MST steps and 6MWT distance (r=0.6-0.7).

Conclusions:

  • The 6MST is a reliable tool for assessing functional capacity in CAD patients.
  • The 6MST is a valid measure when compared to the 6MWT.
  • High concordance (88%) exists in classifying patients by functional capacity tertiles between the two tests.
Abstract

Keywords:
cardiovascular systemcoronary artery diseaseexercise

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