Validation of FRIEND and ACSM Equations for Cardiorespiratory Fitness: Comparison to Direct Measurement in CAD Patients

The regression equation of the American College of Sports Medicine (ACSM) was a preferred method for estimating maximal oxygen consumption (VO2max). Recently, a more precise equation from the fitness registry and the importance of exercise national database (FRIEND) for healthy people was developed....

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Bibliographic Details
Published in:Journal of clinical medicine 2020-06, Vol.9 (6), p.1889
Main Authors: Jang, Won Young, Kang, Dong Oh, Park, Yoonjee, Lee, Jieun, Kim, Woohyeun, Choi, Jah Yeon, Roh, Seung-Young, Jang, Yuna, Park, Se-Hyun, Kim, Woo-Sub, Choi, Cheol Ung, Rha, Seung-Woon, Park, Chang Gyu, Seo, Hong Seog, Kim, Eung Ju
Format: Article
Language:English
Subjects:
Blood pressure
Cardiovascular disease
Clinical medicine
Electrocardiography
Estimates
Exercise
Fitness equipment
Metabolism
Patients
Physical fitness
Rehabilitation
Sexes
Statistical methods
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Summary:The regression equation of the American College of Sports Medicine (ACSM) was a preferred method for estimating maximal oxygen consumption (VO2max). Recently, a more precise equation from the fitness registry and the importance of exercise national database (FRIEND) for healthy people was developed. This study compared VO2max estimated by the ACSM and FRIEND equations to VO2max directly measured in coronary artery disease (CAD) patients. Overall, 293 CAD patients who participated in cardiac rehabilitation between June 2015 and December 2018 were analyzed. Directly measured VO2max values were compared to the ACSM and FRIEND equations. The directly measured VO2max was significantly different from the estimated VO2max by ACSM equation (24.16 vs. 28.7 mL/kg/min, p < 0.001), which was overestimated by 20% in men and 16% in women. However, there was no statistically significant difference between the directly measured VO2max and the estimated VO2max by the FRIEND equation. (24.16 vs. 24.15 mL/kg/min, p = 0.986). In CAD patients, the estimated VO2max from the ACSM equation was significantly higher than the directly measured VO2max. In addition, estimated cardiorespiratory fitness (CRF) by the FRIEND equation showed similar results with directly measured CRF. As a result, the FRIEND equation can predict CRF more accurately than the ACSM.
ISSN:2077-0383
2077-0383
DOI:10.3390/jcm9061889