A Re-examination of the Metabolic Equivalent Concept in Individuals With Coronary Heart Disease

@article{Savage2007ARO,
  title={A Re-examination of the Metabolic Equivalent Concept in Individuals With Coronary Heart Disease},
  author={Patrick D. Savage and Michael J. Toth and Philip A. Ades},
  journal={Journal of Cardiopulmonary Rehabilitation and Prevention},
  year={2007},
  volume={27},
  pages={143-148}
}
OBJECTIVE: The metabolic equivalent (MET) is a commonly used method of quantifying the energy cost and intensity of physical activity. Recent studies have questioned the accuracy of the well-accepted value of a MET of 3.5 mL O2 · kg−1 · min−1. The goal of the present study was to compare the traditionally accepted value for 1 MET to direct measures of resting metabolic rate in a group of stable individuals with coronary heart disease (CHD). METHODS: The primary cohort consisted of 109 (60 men… 
Appropriateness of the metabolic equivalent (MET) as an estimate of exercise intensity for post-myocardial infarction patients
TLDR
Since METs failed to reflect the significantly greater anaerobic contribution during exercise per MET for phase-IV post-MI patients, current METs should be used with caution when determining exercise intensity in any patient with cardiac disease.
Metabolic equivalent concept in apparently healthy men: a re-examination of the standard oxygen uptake value of 3.5 mL·kg(-1)·min(-1.).
TLDR
The standard MET value of 3.5 mL·kg(-1)·min (-1) considerably overestimates mean resting V̇O2 in a relatively large group of apparently healthy men, and a new prediction model for a more homogeneous population is proposed.
Standardized MET Value Underestimates the Energy Cost of Treadmill Running in Men.
TLDR
The reference MET value considerably overestimated observed resting VO2 in men with low VO2max, resulting in underestimations of the maximal MET, exercise intensity prescription, and the energy cost of running.
Influence of appendicular skeletal muscle mass on resting metabolic equivalents in patients with cardiovascular disease: Implications for exercise training and prescription
TLDR
It was hypothesized that patients with a lower skeletal muscle mass would also have a lower RMR, determined by resting respiratory gas analysis, and this would affect the accuracy of the aerobic exercise prescription based on METs, and the potential limitations of using the estimated MET were evaluated.
The Metabolic Equivalent: Reevaluating What We Know About the MET
TLDR
There is, however, increasing evidence that the current MET value, when expressed as a resting measure, significantly overestimates directly measured resting oxygen consumption values and caloric expenditure, potentially reducing the accuracy of the MET as a tool for estimating energy expenditure and calories expenditure during physical activity.
Metabolic equivalents fail to indicate metabolic load in post-myocardial infarction patients during the modified Bruce treadmill walking test
TLDR
Current METs based on non-cardiac individuals appear unsuitable in determining the full metabolic load of the exercise intensity for cardiac patients during the modified Bruce treadmill walking test (MBWT).
Comparison of Conventional and Individualized 1-MET Values for Expressing Maximum Aerobic Metabolic Rate and Habitual Activity Related Energy Expenditure
TLDR
The conventional 1-MET-value appears inappropriate for determining the aerobic metabolic capacity and AEE in active and endurance-trained persons.
Metabolic equivalent (MET) inflation--not the MET we used to know.
  • C. Lavie, R. Milani
  • Medicine
    Journal of cardiopulmonary rehabilitation and prevention
  • 2007
TLDR
In this issue of Journal of Cardiopulmonary Rehabilitation and Prevention, Savage et al raise several issues regarding the determination of the MET, which adds insight into problems that have been raised in the past.
Errors in MET estimates of physical activities using 3.5 ml x kg(-1) x min(-1) as the baseline oxygen consumption.
TLDR
Using 3.5 ml x kg(-1) x min −1 x min (-1) to calculate activity METs causes higher misclassification of activities and inaccurate point estimates of METs than a corrected baseline which considers individual height, weight, and age.
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