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The Role of Body Habitus in Predicting Cardiorespiratory Fitness: Findings from the FRIEND Registry
Author(s) -
Baynard Tracy,
Arena Ross A,
Myers Jonathon,
Kaminsky Leonard A
Publication year - 2016
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.30.1_supplement.1288.4
Subject(s) - cardiorespiratory fitness , waist , cohort , body mass index , vo2 max , medicine , habitus , stepwise regression , aerobic exercise , physical therapy , blood pressure , heart rate , archaeology , ethnography , history
Body habitus has been previously reported to be important in the development of non‐exercise prediction models for estimating cardiorespiratory fitness (CRF). Yet, these previous models have included indices of physical activity, which is not widely assessed in the clinical setting. Purpose To validate and cross‐validate a non‐exercise prediction model from a large and apparently healthy U.S. cohort of individuals who underwent an analysis of body habitus (waist circumference (WC) and body mass index (BMI)) with measured CRF. Methods The large cohort (5030 individuals) was split into validation (4030) and cross‐validation groups (1000), whereby waist circumference and maximal aerobic capacity (VO 2max ) were assessed by rigorously approved laboratories. Results VO 2max was estimated in 2 multiple regression equations using age, sex, and either WC (r = 0.77; standard error of the estimate (SEE) 6.70 mLO 2 ·kg −1 ·min −1 ) or BMI (r = 0.76; SEE 6.89 mLO 2 ·kg −1 ·min −1 ). Cross‐validation yielded similar results. However, as VO 2max increased, there was increased bias, suggesting VO 2max may be underestimated at higher values. Conclusions Both WC and BMI prediction models yielded similar findings, with WC having a slightly smaller SEE. These measures of body habitus appear to be adequate in predicting CRF using non‐exercise parameters, even without a measure of physical activity. Caution should be taken when using these equations in higher fit individuals. Support or Funding Information TKC Global Solutions, LLC.