Metabolic equivalent
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In physiology, a metabolic equivalent, or MET, is defined as the ratio of a person's metabolic rate during an activity relative to their basal resting metabolic rate. One MET then is the amount of energy needed to sit quietly.[1][2] More specifically, 1 MET is resting or basal oxygen consumption (VO2) of a 70-kg, 40-year-old man. One MET is 3.5 mL per kg per min.
As an example, walking quickly (3 to 4 miles-per-hour) requires 4 METs. The METs of numerous activities have been compiled.[3]
In a stress test using the Bruce Protocol, stage 1 is 4.8 METs and stage 2 is 7.0 METs.[1]
Alternatives include:
- New York Heart Association criteria
- Canadian Cardiovascular Society criteria
- The Duke Activity Status Index[4][5]
- The Specific Acitivity Scale[6]
References
- ↑ 1.0 1.1 Hill J, Timmis A (May 2002). "Exercise tolerance testing". BMJ 324 (7345): 1084–7. PMID 11991917. PMC 1123032. [e]
- ↑ Measuring Physical Activity - Staying Active - The Nutrition Source - Harvard School of Public Health. Retrieved on 2008-09-03.
- ↑ Ainsworth BE, Haskell WL, Whitt MC, Irwin ML, Swartz AM, Strath SJ et al. (2000). "Compendium of physical activities: an update of activity codes and MET intensities.". Med Sci Sports Exerc 32 (9 Suppl): S498-504. PMID 10993420.
- ↑ Hlatky MA, Boineau RE, Higginbotham MB, Lee KL, Mark DB, Califf RM et al. (1989). "A brief self-administered questionnaire to determine functional capacity (the Duke Activity Status Index).". Am J Cardiol 64 (10): 651-4. PMID 2782256.
- ↑ Nelson CL, Herndon JE, Mark DB, Pryor DB, Califf RM, Hlatky MA (October 1991). "Relation of clinical and angiographic factors to functional capacity as measured by the Duke Activity Status Index". Am. J. Cardiol. 68 (9): 973–5. PMID 1927964. Retrieved on 2008-09-03. [e]
- ↑ Goldman L, Hashimoto B, Cook EF, Loscalzo A (December 1981). "Comparative reproducibility and validity of systems for assessing cardiovascular functional class: advantages of a new specific activity scale". Circulation 64 (6): 1227–34. PMID 7296795. [e]