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...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
UiT The Arctic University of Norway
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/20272 |
_version_ | 1829300211114049536 |
---|---|
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 |
id | ftunivtroemsoe:oai:munin.uit.no:10037/20272 |
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 |