Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
MET-values of standardised activities in relation to body fat: studies in pregnant and non-pregnant women
Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Medical and Health Sciences, Clinical Physiology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Heart and Medicine Center, Department of Clinical Physiology in Linköping. Karolinska Inst, Sweden; Karolinska Univ Hosp, Sweden.
Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences. Karolinska Inst, Sweden.
2018 (English)In: Nutrition & Metabolism, ISSN 1743-7075, E-ISSN 1743-7075, Vol. 15, article id 45Article in journal (Refereed) Published
Abstract [en]

Background: Physical activity is associated with health in women. Published MET-values (MET: metabolic equivalent of task) may assess physical activity and energy expenditure but tend to be too low for subjects with a high total body fat (TBF) content and therefore inappropriate for many contemporary women. The MET-value for an activity is the energy expenditure of a subject performing this activity divided by his/her resting energy expenditure, often assumed to be 4.2 kJ/kg/h. Relationships between TBF and MET have been little studied although overweight and obesity is common in women. Available data indicate that MET-values decrease during pregnancy but more studies in pregnant contemporary women are needed. Subjects and methods: Using indirect calorimetry we measured energy expenditure and assessed MET-values in women, 22 non-pregnant (BMI: 18-34) and 22 in gestational week 32 (non-pregnant BMI: 18-32) when resting, sitting, cycling (30 and 60 watts), walking (3.2 and 5.6 km/h) and running (8 km/h). Relationships between TBF and MET-values were investigated and used to predict modified MET-values. The potential of such values to improve calculations of total energy expenditure of women was investigated. Results: The resting energy expenditure was below 4.2 kJ/kg/h in both groups of women. Women in gestational week 32 had a higher resting energy metabolism (p amp;lt; 0.001) and 7-15% lower MET-values (p amp;lt; 0.05) than non-pregnant women. MET-values of all activities were correlated with TBF (p amp;lt; 0.05) in non-pregnant women and modified MET-values improved estimates of total energy expenditure in such women. In pregnant women, correlations (p amp;lt;= 0.03) between TBF and MET were found for running (8 km/h) and for walking at 5.6 km/h. Conclusions: Our results are relevant when attempts are made to modify the MET-system in contemporary pregnant and non-pregnant women. MET-values were decreased in gestational week 32, mainly due to an increased resting energy metabolism and studies describing how body composition affects the one MET-value (i.e. the resting energy metabolism in kJ/kg/h) during pregnancy are warranted. Studies of how pregnancy and TBF affect MET-values of high intensity activities are also needed. Corrections based on TBF may have a potential to improve the MET-system in non-pregnant women.

Place, publisher, year, edition, pages
BIOMED CENTRAL LTD , 2018. Vol. 15, article id 45
Keywords [en]
Body fat; Energy expenditure; Physical activity; Pregnancy; Metabolic equivalent; Women
National Category
Nutrition and Dietetics
Identifiers
URN: urn:nbn:se:liu:diva-149715DOI: 10.1186/s12986-018-0281-zISI: 000435912500003PubMedID: 29951109OAI: oai:DiVA.org:liu-149715DiVA, id: diva2:1233581
Note

Funding Agencies|Formas; Ostergotland County Council; M Bergvalls foundation; Thurings foundation; Swedish Society of Medicine

Available from: 2018-07-18 Created: 2018-07-18 Last updated: 2018-08-06

Open Access in DiVA

fulltext(629 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 629 kBChecksum SHA-512
5cb702ba200649f393749430a6c4fc48b15acc577617e7e924855124bd4d8831da5db6a21802ef9272f04ee1335385972818dbab43fd331e9c92a181d2e67b70
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Forsum, ElisabetJanerot Sjöberg, BirgittaLöf, Marie
By organisation
Division of Surgery, Orthopedics and OncologyFaculty of Medicine and Health SciencesClinical PhysiologyDepartment of Clinical Physiology in LinköpingDivision of Community Medicine
In the same journal
Nutrition & Metabolism
Nutrition and Dietetics

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 63 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf