Construct validation of a non-exercise measure of cardiorespiratory fitness in older adults

Emily L. Mailey, Siobhan M. White, Thomas R. Wójcicki, Amanda N. Szabo, Arthur F. Kramer, Edward McAuley*

*Corresponding author for this work

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

Background: Cardiorespiratory fitness (CRF) is associated with a decreased risk of all-cause mortality but is rarely assessed in medical settings due to burdens of time, cost, risk, and resources. The purpose of this study was to test the construct validity of a regression equation developed by Jurca and colleagues (2005) to estimate CRF without exercise testing in community dwelling older adults. Methods: Participants (n = 172) aged 60 to 80 years with no contraindications to submaximal or maximal exercise testing completed a maximal graded exercise test (GXT) and the submaximal Rockport 1-mile walk test on separate occasions. Data included in the regression equation (age, sex, body mass index, resting heart rate, and physical activity) were obtained via measurement or self-report. Participants also reported presence of cardiovascular conditions. Results: The multiple R for the regression equation was .72, p < .001 and CRF estimated from this equation was significantly correlated with the MET value from the GXT (r = 0.66) and with CRF estimated from submaximal field testing (r = 0.67). All three CRF indices were significantly and inversely associated with reporting more cardiovascular conditions. Conclusions: This research provides preliminary evidence that a non-exercise estimate of CRF is at least as valid as field test estimates of CRF and represents a low-risk, low-cost, and expedient method for estimating fitness in older adults.

Original languageEnglish (US)
Article number59
JournalBMC Public Health
Volume10
DOIs
Publication statusPublished - Mar 12 2010

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ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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