Metabolic equivalents (METS) in exercise testing, exercise prescription, and evaluation of functional capacity

@article{Jett1990MetabolicE,
  title={Metabolic equivalents (METS) in exercise testing, exercise prescription, and evaluation of functional capacity},
  author={M. Jett{\'e} and K. H. Sidney and Gerhard Bluemchen},
  journal={Clinical Cardiology},
  year={1990},
  volume={13}
}
One metabolic equivalent (MET) is defined as the amount of oxygen consumed while sitting at rest and is equal to 3.5 ml O2 per kg body weight x min. The MET concept represents a simple, practical, and easily understood procedure for expressing the energy cost of physical activities as a multiple of the resting metabolic rate. The energy cost of an activity can be determined by dividing the relative oxygen cost of the activity (ml O2/kg/min)x by 3.5. This article summarizes and presents energy… 

The Metabolic Equivalent: Reevaluating What We Know About the MET

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 equivalent: one size does not fit all.

Using measured or predicted RMR as a correction factor can appropriately adjust for individual differences when estimating the energy cost of moderate intensity walking, and the 1-MET of 1 kcal/h overestimates resting energy expenditure by 20%.

Examination of the Estimated Resting Metabolic Equivalent (MET) in Overweight and Obesity

Differences between the measured and estimated oxygen consumption rep- resenting 1 MET in overweight and obese adults may have implications with regards to energy expenditure and its assumed impact on body weight regulation.

Comparison of Conventional and Individualized 1-MET Values for Expressing Maximum Aerobic Metabolic Rate and Habitual Activity Related Energy Expenditure

The conventional 1-MET-value appears inappropriate for determining the aerobic metabolic capacity and AEE in active and endurance-trained persons.

Influence of appendicular skeletal muscle mass on resting metabolic equivalents in patients with cardiovascular disease: Implications for exercise training and prescription

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.

Metabolic equivalents of task are confounded by adiposity, which disturbs objective measurement of physical activity

This review demonstrates that false methodology may cause paradoxical observations if physical activity would be assessed by body weight scaled values such as standard METs, and suggests lean mass proportional measures of energy expenditure would enable a more truthful choice to assess physical activity.
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