Metabolic Equivalent in Adolescents, Active Adults and Pregnant Women

Autoren

Katarina Melzer
Juliane Heydenreich
Yves Schutz
Anne Renaud
Bengt Kayser
Urs Mäder

DOI

10.3390/nu8070438

eISSN

2072-6643

Ausgabe der Veröffentlichung

7

Zeitschrift

Nutrients

Sprache

en

Online publication date

2016

Paginierung

438 - 438

Status

Published online

Herausgeber

MDPI AG

Herausgeber URL

http://dx.doi.org/10.3390/nu8070438

Datum der Datenerfassung

2018

Titel

Metabolic Equivalent in Adolescents, Active Adults and Pregnant Women

Ausgabe der Zeitschrift

8

Datenquelle: Crossref

Abstract

"Metabolic Equivalent" (MET) represents a standard amount of oxygen consumed by the body under resting conditions, and is defined as 3.5 mL O₂/kg × min or ~1 kcal/kg × h. It is used to express the energy cost of physical activity in multiples of MET. However, universal application of the 1-MET standard was questioned in previous studies, because it does not apply well to all individuals. Height, weight and resting metabolic rate (RMR, measured by indirect calorimetry) were measured in adolescent males (n = 50) and females (n = 50), women during pregnancy (gestation week 35-41, n = 46), women 24-53 weeks postpartum (n = 27), and active men (n = 30), and were compared to values predicted by the 1-MET standard. The RMR of adolescent males (1.28 kcal/kg × h) was significantly higher than that of adolescent females (1.11 kcal/kg × h), with or without the effects of puberty stage and physical activity levels. The RMR of the pregnant and post-pregnant subjects were not significantly different. The RMR of the active normal weight (0.92 kcal/kg × h) and overweight (0.89 kcal/kg × h) adult males were significantly lower than the 1-MET value. It follows that the 1-MET standard is inadequate for use not only in adult men and women, but also in adolescents and physically active men. It is therefore recommended that practitioners estimate RMR with equations taking into account individual characteristics, such as sex, age and Body Mass Index, and not rely on the 1-MET standard.

Addresses

Swiss Federal Institute of Sport, Magglingen 2532, Switzerland. katarina.melzer@baspo.admin.ch.

Autoren

Katarina Melzer
Juliane Heydenreich
Yves Schutz
Anne Renaud
Bengt Kayser
Urs Mäder

DOI

10.3390/nu8070438

eISSN

2072-6643

Externe Identifier

PubMed Identifier: 27447667
PubMed Central ID: PMC4963914

Open access

true

ISSN

2072-6643

Ausgabe der Veröffentlichung

7

Zeitschrift

Nutrients

Schlüsselwörter

Humans
Thinness
Basal Metabolism
Body Mass Index
Exercise
Reproducibility of Results
Energy Metabolism
Oxygen Consumption
Aging
Postpartum Period
Lactation
Pregnancy
Pregnancy Trimester, Third
Sex Characteristics
Adolescent
Adult
Child
Switzerland
Female
Male
Overweight
Young Adult

Sprache

eng

Medium

Electronic

Online publication date

2016

Open access status

Open Access

Paginierung

E438

Datum der Veröffentlichung

2016

Status

Published

Publisher licence

CC BY

Datum der Datenerfassung

2016

Titel

Metabolic Equivalent in Adolescents, Active Adults and Pregnant Women.

Sub types

Comparative Study
research-article
Journal Article

Ausgabe der Zeitschrift

8

Files

https://www.mdpi.com/2072-6643/8/7/438/pdf?version=1468998207 https://europepmc.org/articles/PMC4963914?pdf=render

Datenquelle: Europe PubMed Central

Abstract

"Metabolic Equivalent" (MET) represents a standard amount of oxygen consumed by the body under resting conditions, and is defined as 3.5 mL O₂/kg × min or ~1 kcal/kg × h. It is used to express the energy cost of physical activity in multiples of MET. However, universal application of the 1-MET standard was questioned in previous studies, because it does not apply well to all individuals. Height, weight and resting metabolic rate (RMR, measured by indirect calorimetry) were measured in adolescent males (n = 50) and females (n = 50), women during pregnancy (gestation week 35-41, n = 46), women 24-53 weeks postpartum (n = 27), and active men (n = 30), and were compared to values predicted by the 1-MET standard. The RMR of adolescent males (1.28 kcal/kg × h) was significantly higher than that of adolescent females (1.11 kcal/kg × h), with or without the effects of puberty stage and physical activity levels. The RMR of the pregnant and post-pregnant subjects were not significantly different. The RMR of the active normal weight (0.92 kcal/kg × h) and overweight (0.89 kcal/kg × h) adult males were significantly lower than the 1-MET value. It follows that the 1-MET standard is inadequate for use not only in adult men and women, but also in adolescents and physically active men. It is therefore recommended that practitioners estimate RMR with equations taking into account individual characteristics, such as sex, age and Body Mass Index, and not rely on the 1-MET standard.

Date of acceptance

2016

Autoren

Katarina Melzer
Juliane Heydenreich
Yves Schutz
Anne Renaud
Bengt Kayser
Urs Mäder

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/27447667

DOI

10.3390/nu8070438

eISSN

2072-6643

Externe Identifier

PubMed Central ID: PMC4963914

Ausgabe der Veröffentlichung

7

Zeitschrift

Nutrients

Schlüsselwörter

active men
adolescents
metabolic equivalent
physical activity
pregnant women
resting metabolic rate
Adolescent
Adult
Aging
Basal Metabolism
Body Mass Index
Child
Energy Metabolism
Exercise
Female
Humans
Lactation
Male
Overweight
Oxygen Consumption
Postpartum Period
Pregnancy
Pregnancy Trimester, Third
Reproducibility of Results
Sex Characteristics
Switzerland
Thinness
Young Adult

Sprache

eng

Country

Switzerland

PII

nu8070438

Datum der Veröffentlichung

2016

Status

Published online

Datum, an dem der Datensatz öffentlich gemacht wurde

2017

Titel

Metabolic Equivalent in Adolescents, Active Adults and Pregnant Women.

Sub types

Comparative Study
Journal Article

Ausgabe der Zeitschrift

8

Datenquelle: PubMed

Metabolic Equivalent in Adolescents, Active Adults and Pregnant Women

Files

Werkzeuge