Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures

The present thesis has investigated the cross-sectional and prospective associations between self-reported and objectively measured physical activity with five objectively measured indices of body composition in Norwegian adolescents participating in the Tromsø Study Fit: Futures Cohort. The three i...

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Main Author: Aars, Nils Abel
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: UiT The Arctic University of Norway 2021
Subjects:
Online Access:https://hdl.handle.net/10037/20272
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author Aars, Nils Abel
author_facet Aars, Nils Abel
author_sort Aars, Nils Abel
collection University of Tromsø: Munin Open Research Archive
description The present thesis has investigated the cross-sectional and prospective associations between self-reported and objectively measured physical activity with five objectively measured indices of body composition in Norwegian adolescents participating in the Tromsø Study Fit: Futures Cohort. The three included papers used regression analyses to assess the cross-sectional association between self-reported physical activity and body composition in first year of upper secondary high school, and whether self-reported or objectively measured physical activity predicted changes in body composition between first- and last year of upper secondary high school. A significant cross sectional association was observed between self-reported physical activity and waist circumference (girls only), fat- and lean mass index for both sexes, but self-reported physical activity generally did not predict changes to body composition between baseline- and follow-up. Changes in level of physical activity during follow-up was predictive of changes in fat mass index in boys and lean mass index in girls. Objectively measured physical activity at baseline did not predict changes in body composition in boys, whereas time spent in sedentary- and light intensity predicted changes in indices of lean mass in girls. No association was observed with BMI in either of the included papers. The findings are interpreted in light of the substantial changes that occur in both habits and body composition during adolescence, and shows that there are health benefits of remaining- or becoming physically active during this period.
format Doctoral or Postdoctoral Thesis
genre Tromsø
genre_facet Tromsø
geographic Tromsø
geographic_facet Tromsø
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institution Open Polar
language English
op_collection_id ftunivtroemsoe
op_relation Paper I: Aars, N.A., Jacobsen, B.K., Furberg, A.‐S. & Grimsgaard, S. (2019). Self‐reported physical activity during leisure time was favourably associated with body composition in Norwegian adolescents. Acta Paediatrica, 108 , 1122-1127. Also available at https://doi.org/10.1111/apa.14660 . Paper II: Aars, N.A., Jacobsen, B.K., Morseth, B., Emaus, N. & Grimsgaard, S. (2019). Longitudinal changes in body composition and waist circumference by self-reported levels of physical activity in leisure among adolescents: the Tromsø study, Fit Futures. BMC Sports Science, Medicine and Rehabilitation, 11 , 37. Also available in Munin at https://hdl.handle.net/10037/17343 . Paper III: Aars, N.A., Beldo, S., Jacobsen, B.K., Horsch, A., Morseth, B., Emaus, N., Furberg, A.S. & Grimsgaard, S. (2020). Association between objectively measured physical activity and longitudinal changes in body composition in adolescents: the Tromsø study fit futures cohort. BMJ Open, 10 , e036991. Also available in Munin at https://hdl.handle.net/10037/20037 .
https://hdl.handle.net/10037/20272
op_rights Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
openAccess
Copyright 2021 The Author(s)
https://creativecommons.org/licenses/by-nc-sa/4.0
publishDate 2021
publisher UiT The Arctic University of Norway
record_format openpolar
spelling ftunivtroemsoe:oai:munin.uit.no:10037/20272 2025-04-13T14:27:33+00:00 Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures Aars, Nils Abel 2021-02-04 https://hdl.handle.net/10037/20272 eng eng UiT The Arctic University of Norway UiT Norges arktiske universitet Paper I: Aars, N.A., Jacobsen, B.K., Furberg, A.‐S. & Grimsgaard, S. (2019). Self‐reported physical activity during leisure time was favourably associated with body composition in Norwegian adolescents. Acta Paediatrica, 108 , 1122-1127. Also available at https://doi.org/10.1111/apa.14660 . Paper II: Aars, N.A., Jacobsen, B.K., Morseth, B., Emaus, N. & Grimsgaard, S. (2019). Longitudinal changes in body composition and waist circumference by self-reported levels of physical activity in leisure among adolescents: the Tromsø study, Fit Futures. BMC Sports Science, Medicine and Rehabilitation, 11 , 37. Also available in Munin at https://hdl.handle.net/10037/17343 . Paper III: Aars, N.A., Beldo, S., Jacobsen, B.K., Horsch, A., Morseth, B., Emaus, N., Furberg, A.S. & Grimsgaard, S. (2020). Association between objectively measured physical activity and longitudinal changes in body composition in adolescents: the Tromsø study fit futures cohort. BMJ Open, 10 , e036991. Also available in Munin at https://hdl.handle.net/10037/20037 . https://hdl.handle.net/10037/20272 Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) openAccess Copyright 2021 The Author(s) https://creativecommons.org/licenses/by-nc-sa/4.0 VDP::Medical disciplines: 700::Health sciences: 800::Community medicine Social medicine: 801 VDP::Medisinske Fag: 700::Helsefag: 800::Samfunnsmedisin sosialmedisin: 801 The Tromsø Study Tromsøundersøkelsen Doctoral thesis Doktorgradsavhandling 2021 ftunivtroemsoe 2025-03-14T05:17:55Z The present thesis has investigated the cross-sectional and prospective associations between self-reported and objectively measured physical activity with five objectively measured indices of body composition in Norwegian adolescents participating in the Tromsø Study Fit: Futures Cohort. The three included papers used regression analyses to assess the cross-sectional association between self-reported physical activity and body composition in first year of upper secondary high school, and whether self-reported or objectively measured physical activity predicted changes in body composition between first- and last year of upper secondary high school. A significant cross sectional association was observed between self-reported physical activity and waist circumference (girls only), fat- and lean mass index for both sexes, but self-reported physical activity generally did not predict changes to body composition between baseline- and follow-up. Changes in level of physical activity during follow-up was predictive of changes in fat mass index in boys and lean mass index in girls. Objectively measured physical activity at baseline did not predict changes in body composition in boys, whereas time spent in sedentary- and light intensity predicted changes in indices of lean mass in girls. No association was observed with BMI in either of the included papers. The findings are interpreted in light of the substantial changes that occur in both habits and body composition during adolescence, and shows that there are health benefits of remaining- or becoming physically active during this period. Doctoral or Postdoctoral Thesis Tromsø University of Tromsø: Munin Open Research Archive Tromsø
spellingShingle VDP::Medical disciplines: 700::Health sciences: 800::Community medicine
Social medicine: 801
VDP::Medisinske Fag: 700::Helsefag: 800::Samfunnsmedisin
sosialmedisin: 801
The Tromsø Study
Tromsøundersøkelsen
Aars, Nils Abel
Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title_full Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title_fullStr Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title_full_unstemmed Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title_short Physical Activity and Body Composition in Norwegian Adolescents. Results from The Tromsø Study: Fit Futures
title_sort physical activity and body composition in norwegian adolescents. results from the tromsø study: fit futures
topic VDP::Medical disciplines: 700::Health sciences: 800::Community medicine
Social medicine: 801
VDP::Medisinske Fag: 700::Helsefag: 800::Samfunnsmedisin
sosialmedisin: 801
The Tromsø Study
Tromsøundersøkelsen
topic_facet VDP::Medical disciplines: 700::Health sciences: 800::Community medicine
Social medicine: 801
VDP::Medisinske Fag: 700::Helsefag: 800::Samfunnsmedisin
sosialmedisin: 801
The Tromsø Study
Tromsøundersøkelsen
url https://hdl.handle.net/10037/20272