What Does Met Stand For

Measure used to describe relative free energy expenditure

The metabolic equivalent of task (MET) is the objective mensurate of the ratio of the charge per unit at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, set past convention at 3.5 mL of oxygen per kilogram per minute, which is roughly equivalent to the energy expended when sitting quietly.

Quantitative definitions [edit]

Based on oxygen utilization and trunk mass [edit]

The original definition of metabolic equivalent of job is the oxygen used by a person in milliliters per minute per kilogram body mass divided by 3.5.

Other definitions which roughly produce the same numbers have been devised, such as:

${\displaystyle {\text{1 MET}}\ =1\,{\frac {\text{kcal}}{{\text{kg}}\times {\text{h}}}}\ =four.184\,{\frac {\text{kJ}}{{\text{kg}}\times {\text{h}}}}=1.162\,{\frac {\text{W}}{\text{kg}}}}$

where

• kcal = kilocalorie
• kg = kilogram
• h = hour
• kJ = kilojoule
• West = watt

Based on watts produced and body surface area [edit]

Still some other definition is based on the body surface area, BSA, and energy itself, where the BSA is expressed in m²:

${\displaystyle {\text{i MET}}\ =58.two\,{\frac {\text{J}}{{\text{s}}\times {\text{BSA}}}}\ =58.ii\,{\frac {\text{Due west}}{{\text{m}}^{2}}}=18.4\,{\frac {\text{Btu}}{{\text{h}}\times {\text{ft}}^{2}}}}$

which is equal to the rate of energy produced per unit surface surface area of an average person seated at residual. The BSA of an average person is 1.8 mⁱⁱ (19 ftⁱⁱ). Metabolic rate is ordinarily expressed in terms of unit area of the full torso surface (ANSI/ASHRAE Standard 55^[1]).

Based on resting metabolic rate [edit]

Originally, one MET was considered as the resting metabolic rate (RMR) obtained during quiet sitting.^{[ii] [three]}

Although the RMR of any person may deviate from the reference value, MET can be idea of as an index of the intensity of activities: for example, an activity with a MET value of two, such as walking at a ho-hum pace (e.g., iii km/h) would require twice the energy that an average person consumes at rest (due east.g., sitting quietly).^{[4] [five]}

Use [edit]

MET: The ratio of the work metabolic rate to the resting metabolic rate. One MET is defined equally 1 kcal/kg/hour and is roughly equivalent to the energy price of sitting quietly. A MET as well is defined as oxygen uptake in ml/kg/min with ane MET equal to the oxygen cost of sitting quietly, equivalent to 3.five ml/kg/min. The MET concept was primarily designed to be used in epidemiological surveys, where survey respondents answer the amount of time they spend for specific physical activities.^[3] MET is used to provide general medical thresholds and guidelines to a population.^{[vi] [7]} A MET is the ratio of the rate of energy expended during an activity to the rate of energy expended at rest. For example, 1 MET is the rate of free energy expenditure while at rest. A 4 MET activeness expends 4 times the energy used by the body at residuum. If a person does a 4 MET activity for xxx minutes, he or she has done 4 x thirty = 120 MET-minutes (or 2.0 MET-hours) of concrete activity. A person could also achieve 120 MET-minutes by doing an viii MET activity for xv minutes.^[eight]

In a systematic review of concrete activity and major chronic diseases, a meta‐analysis of 11.25 MET h/calendar week increase in physical activity yielded: 23% lower risk of cardiovascular affliction bloodshed (0.77 relative risk (RR), 95% confidence interval (CI), 0.71-0.84), and 26% lower risk of type 2 diabetes (0.74 RR, 95% CI, 0.72-0.77).^[9]

Exercise guidelines [edit]

The American Higher of Sports Medicine and American Heart Association guidelines count periods of at least 10 minutes of moderate MET level activity towards their recommended daily amounts of exercise. For healthy adults aged 18 to 65, the guidelines recommend moderate do for thirty minutes v days a week, or vigorous aerobic exercise for 20 minutes 3 days a week.^[10]

Activities [edit]

Physical action	MET
Light intensity activities	< 3
writing, desk work, using computer	1.5[10]
walking slowly	2.0[ten]
Moderate intensity activities	3 to 6
walking, 3.0 mph (four.8 km/h)	3.0[x]
sweeping or mopping floors, vacuuming carpets	3 to 3.5[10]
yoga session with asanas and pranayama	3.3[eleven]
Tennis doubles	five.0[x]
Weight lifting (moderate intensity)	5.0[12]
sexual action, aged 22	5.8[thirteen]
Vigorous intensity activities	≥6
aerobic dancing, medium endeavour	six.0[12]
bicycling, on flat, 10–12 mph (sixteen–19 km/h), light attempt	half-dozen.0[ten]
jumping jacks	>six.0[fourteen]
sun salutation (Surya Namaskar, vigorous with transition jumps)	vii.4[11]
basketball game	eight.0[10]
swimming moderately to difficult	8 to 11[10]
jogging, 5.6 mph (9.0 km/h)	8.8[12]
rope jumping (66/min)	9.eight[12]
football	10.iii[15]
rope jumping (84/min)	x.five[12]
rope jumping (100/min)	eleven.0[12]
jogging, half dozen.eight mph (10.9 km/h)	11.2[12]

Limitations [edit]

The definition of MET is problematic when used for specific persons.^{[4] [5]} By convention, one MET is considered equivalent to the consumption of iii.v ml O₂·kg⁻¹·min^−one (or 3.five ml of oxygen per kilogram of trunk mass per minute) and is roughly equivalent to the expenditure of 1 kcal per kilogram of body weight per hour. This value was outset experimentally derived from the resting oxygen consumption of a particular subject area (a healthy xl-year-onetime, 70 kg man) and must therefore be treated as a convention. Since the RMR of a person depends mainly on lean body mass (and non full weight) and other physiological factors such equally health condition, historic period, etc., bodily RMR (and thus 1-MET energy equivalents) may vary significantly from the kcal/(kg·h) rule of thumb. RMR measurements by calorimetry in medical surveys have shown that the conventional one-MET value overestimates the actual resting O₂ consumption and free energy expenditures by about 20% to 30% on the boilerplate, whereas body composition (ratio of body fat to lean body mass) deemed for most of the variance.^{[4] [5]}

Standardized definition for research [edit]

The Compendium of Physical Activities was adult for use in epidemiologic studies to standardize the assignment of MET intensities in physical activeness questionnaires. Dr. Bill Haskell from Stanford University conceptualized the compendium and developed a prototype for the document. The compendium was used first in the Survey of Activity, Fitness, and Exercise (Safety study – 1987 to 1989) to code and score physical activity records. Since and then, the compendium has been used in studies worldwide to assign intensity units to physical activity questionnaires and to develop innovative means to appraise energy expenditure in physical activity studies. The compendium was published in 1993 and updated in 2000 and 2011.^{[16] [17]}

Meet also [edit]

• Anthropogenic metabolism
• Basal metabolic rate
• Calorimetry
• VO2 max
• vVO2max

References [edit]

1. ^ ANSI/ASHRAE Standard 55, Thermal Environmental Conditions for Human Occupancy
2. ^ Ainsworth et al. 1993
3. ^ ^{a b} Ainsworth et al. 2000
4. ^ ^{a b c} Byrne et al. 2005
5. ^ ^{a b c} Cruel, Toth & Ades 2007
6. ^ Royall et al. 2008
7. ^ Earth Health Organisation 2010^{[ page needed ]}
8. ^ "Appendix 1 – 2008 Physical Activity Guidelines – health.gov".
9. ^ Wahid, Ahad; Manek, Nishma; Nichols, Melanie; Kelly, Paul; Foster, Charlie; Webster, Premila; Kaur, Asha; Friedemann Smith, Claire; Wilkins, Elizabeth; Rayner, Mike; Roberts, Nia; Scarborough, Peter (September 2016). "Quantifying the Association Between Physical Activity and Cardiovascular Disease and Diabetes: A Systematic Review and Meta‐Analysis". Periodical of the American Centre Association. v (9): e002495. doi:10.1161/JAHA.115.002495. PMC5079002. PMID 27628572.
10. ^ ^{a b c d eastward f 1000 h i} Haskell, William L.; Lee, I.-Min; Pate, Russell R.; Powell, Kenneth E.; Blair, Steven N.; Franklin, Barry A.; Macera, Caroline A.; Heath, Gregory West.; Thompson, Paul D.; Bauman, Adrian (28 August 2007). "Concrete activity and public health: updated recommendation for adults from the American College of Sports Medicine and the American Center Association". Circulation. 116 (9): 1081–1093. doi:10.1161/CIRCULATIONAHA.107.185649. PMID 17671237. The guidelines are free to download.
11. ^ ^{a b} Larson-Meyer, D. Enette (2016). "A Systematic Review of the Energy Cost and Metabolic Intensity of Yoga". Medicine & Scientific discipline in Sports & Exercise. 48 (eight): 1558–1569. doi:10.1249/MSS.0000000000000922. PMID 27433961. The review examined 17 studies, of which ten measured the energy toll of yoga sessions.
12. ^ ^{a b c d east f g} Jetté, M.; Sidney, One thousand.; Blümchen, G. (August 1990). "Metabolic equivalents (METS) in do testing, practise prescription, and evaluation of functional capacity". Clinical Cardiology. 13 (8): 555–565. doi:10.1002/clc.4960130809. PMID 2204507.
13. ^ Frappier et al. 2013
14. ^ "General Concrete Activities Defined by Level of Intensity" (PDF). cdc.gov. CDC. Retrieved February vii, 2020.
15. ^ JETTE, SIDNEY, BLUMCHEN (1990). "Metabolic Equivalents (METS) in Exercise Testing, Exercise Prescription, and Evaluation of Functional Capacity". Clin Cardiol. thirteen (8): 555–565. doi:x.1002/clc.4960130809. PMID 2204507. S2CID 23629878. {{cite journal}}: CS1 maint: multiple names: authors list (link)
16. ^ Ainsworth et al. 2011
17. ^ "Compendia – Compendium of Physical Activities". Compendium of Physical Activities on Google Sites . Retrieved 26 May 2018. Web site with links to the Compendia

Sources [edit]

• Ainsworth, Barbara East.; Haskell, William L.; Herrmann, Stephen D.; Meckes, Nathanael; Bassett, David R.; Tudor-Locke, Catrine; Greer, Jennifer L.; Vezina, Jesse; Whitt-Glover, Melicia C.; Leon, Arthur South. (2011). "2011 Compendium of Concrete Activities". Medicine & Science in Sports & Practice. 43 (8): 1575–81. doi:10.1249/mss.0b013e31821ece12. PMID 21681120. S2CID 12441350.
• Ainsworth, Barbara Eastward.; Haskell, William L.; Leon, Arthur S.; Jacobs, David R.; Montoye, Henry J.; Sallis, James F.; Paffenbarger, Ralph S. (1993). "Compendium of Physical Activities: Classification of free energy costs of human physical activities". Medicine & Science in Sports & Exercise. 25 (1): 71–eighty. doi:10.1249/00005768-199301000-00011. PMID 8292105.
• Ainsworth, Barbara Due east.; Haskell, William 50.; Whitt, Melicia C.; Irwin, Melinda L.; Swartz, Ann Grand.; Strath, Scott J.; O'Brien, William Fifty.; Bassett, David R.; Schmitz, Kathryn H.; Emplaincourt, Patricia O.; Jacobs, David R.; Leon, Arthur S. (2000). "Compendium of Physical Activities: An update of activity codes and MET intensities". Medicine & Science in Sports & Practice. 32 (nine Suppl): S498–504. CiteSeerXten.ane.i.524.3133. doi:10.1097/00005768-200009001-00009. PMID 10993420.
• Byrne, Nuala M.; Hills, Andrew P.; Hunter, Gary R.; Weinsier, Roland L.; Schutz, Yves (2005). "Metabolic equivalent: One size does non fit all". Journal of Applied Physiology. 99 (three): 1112–9. CiteSeerX10.i.1.494.7568. doi:10.1152/japplphysiol.00023.2004. PMID 15831804. S2CID 11895307.
• Frappier, J.; Toupin, I.; Levy, J.J.; Aubertin-Leheudre, M.; Karelis, A.D. (2013). "Energy Expenditure during Sexual Activity in Immature Healthy Couples". PLoS ONE. viii (x): e79342. Bibcode:2013PLoSO...879342F. doi:10.1371/journal.pone.0079342. PMC3812004. PMID 24205382.
• Manore, Melinda; Thompson, Janice (2000). Sport Nutrition for Health and Operation. Man Kinetics. ISBN978-0-87322-939-5.
• Royall, Penelope Slade; Troiano, Richard P.; Johnson, Melissa A.; Kohl, Harold West.; Fulton, Janet East. (2008). "Appendix one. Translating Scientific Evidence Almost Total Amount and Intensity of Physical Activeness Into Guidelines". 2008 Physical Activeness Guidelines for Americans. U.s.a. Department of Health and Homo Services. pp. 54–vii.
• Savage, Patrick D.; Toth, Michael J.; Ades, Philip A. (2007). "A Re-test of the Metabolic Equivalent Concept in Individuals With Coronary Centre Disease". Journal of Cardiopulmonary Rehabilitation and Prevention. 27 (3): 143–8. doi:x.1097/01.HCR.0000270693.16882.d9. PMID 17558194. S2CID 8276706.
• Sotile, Wayne M.; Cantor-Cooke, R. (2003). Thriving with Centre Disease: A Unique Program for Y'all and Your Family. pp. 161–two. ISBN978-0-7432-4364-3.
• World Health Organization (2010). Global Recommendations on Physical Activity for Health. World Health Organization. ISBN978-92-four-159997-9.

External links [edit]

• Ameliorate weight management through science – mayin.org/ajaysha
• The Compendium of Concrete Activities – University of South Carolina
• The Compendium of Physical Activities Tracking Guide – sites.google.com

What Does Met Stand For,

Source: https://en.wikipedia.org/wiki/Metabolic_equivalent_of_task

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