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Related Experiment Videos

The 6-minute walk test: how important is the learning effect?

Grace Wu1, Bonnie Sanderson, Vera Bittner

  • 1University of Alabama School of Medicine, University of Alabama at Birmingham, AL 35294-0007, USA.

American Heart Journal
|July 10, 2003
PubMed
Summary

The learning effect from the 6-minute walk test (6MWT) persists for at least two months. A subsequent, smaller learning effect also occurs during follow-up testing, impacting outcomes measures.

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Area of Science:

  • Cardiopulmonary rehabilitation
  • Clinical trial methodology
  • Exercise physiology

Background:

  • The 6-minute walk test (6MWT) is a standard submaximal exercise test for clinical trials and rehabilitation.
  • While initial learning effects are known, their persistence over time is unclear.

Purpose of the Study:

  • To investigate if the learning effect of the 6MWT persists after a 2-month interval.
  • To assess if additional learning occurs during follow-up testing.

Main Methods:

  • Fifty healthy adults unfamiliar with the 6MWT completed six walks: three at baseline and three after a 2-month follow-up.
  • Distances were analyzed using a general linear model for repeated measures.
  • Covariates included height, weight, and physical activity levels.

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Main Results:

  • Significant increases in walk distance were observed between walks 1-3 and walks 4-6.
  • No significant difference in distance was found between walk 3 (baseline) and walk 4 (follow-up), 2 months later.
  • The initial learning effect correlated inversely with baseline performance but not with demographic or activity factors.

Conclusions:

  • The learning effect from the 6MWT is maintained over a 2-month period.
  • A secondary learning effect is evident during follow-up testing.
  • Both initial and follow-up learning effects must be considered when interpreting 6MWT results as outcome measures.