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Comparison of summer and winter objectively measured physical activity and sedentary behavior in older adults: Age, gene/environment susceptibility Reykjavik study

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dc.contributor.author Arnardóttir, Nanna Ýr
dc.contributor.author Oskarsdottir, Nina Dora
dc.contributor.author Brychta, Robert J.
dc.contributor.author Koster, Annemarie
dc.contributor.author Van Domelen, Dane R.
dc.contributor.author Caserotti, Paolo
dc.contributor.author Eiriksdottir, Gudny
dc.contributor.author Sverrisdottir, Johanna E.
dc.contributor.author Johannsson, Erlingur
dc.contributor.author Launer, Lenore J.
dc.contributor.author Guðnason, Vilmundur G
dc.contributor.author Harris, Tamara B.
dc.contributor.author Chen, Kong Y.
dc.contributor.author Sveinsson, Þórarinn
dc.date.accessioned 2022-03-26T01:01:15Z
dc.date.available 2022-03-26T01:01:15Z
dc.date.issued 2017-10-21
dc.identifier.citation Arnardóttir , N Ý , Oskarsdottir , N D , Brychta , R J , Koster , A , Van Domelen , D R , Caserotti , P , Eiriksdottir , G , Sverrisdottir , J E , Johannsson , E , Launer , L J , Guðnason , V G , Harris , T B , Chen , K Y & Sveinsson , Þ 2017 , ' Comparison of summer and winter objectively measured physical activity and sedentary behavior in older adults: Age, gene/environment susceptibility Reykjavik study ' , International Journal of Environmental Research and Public Health , vol. 14 , no. 10 , 1268 . https://doi.org/10.3390/ijerph14101268
dc.identifier.issn 1661-7827
dc.identifier.other PURE: 12055380
dc.identifier.other PURE UUID: bfe429f2-8a10-4e9d-9aa2-5743903cc467
dc.identifier.other researchoutputwizard: hdl.handle.net/20.500.11815/544
dc.identifier.other Scopus: 85031997788
dc.identifier.uri https://hdl.handle.net/20.500.11815/2974
dc.description Funding Information: Acknowledgments: This study has been funded by NIA contract N01-AG-1-2100, the NIA Intramural Research Program, Hjartavernd (the Icelandic Heart Association), and the Althingi (the Icelandic Parliament). This work was also supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903 and by the National Institutes of Health Intramural Research Program, grant number: Z01 DK071013 and Z01 DK071014 to Robert J. Brychta and Kong Y. Chen. The researchers are indebted to the participants for their willingness to participate in the study. Funding Information: To improve the sensitivity of detecting differences between seasons, we carried out a within-individual nested study We asked two hundred and nineteen (219) subjects who had worn an accelerometer during the “summer” months with more hours of daylight (from 15 May to 30 September 2009) to wear the monitor again for a week during the “winter” months with fewer daylight hours (from 18 November 2009 to 19 March 2010). 160 subjects accepted participation, and three device malfunctions led to 157 participants with usable accelerometer data, 138 of which had four or more valid days of measurements in both winter and summer sessions and were used for the final primary analysis. The summer-winter sub-group was found to reflect the total participants measured in the original accelerometry study. No measurements were done in July 2009 because of summer vacations and in late December 2009 because of Christmas. The study was approved by the Icelandic National Bioethics Committee (VSN: 00-063), the Icelandic Data Protection Authority, and the institutional review board of the U.S. National Institute on Aging, National Institutes of Health. Signed informed consent was given by all participants. Publisher Copyright: © 2017 by the authors. Licensee MDPI, Basel, Switzerland.
dc.description.abstract In Iceland, there is a large variation in daylight between summer and winter. The aim of the study was to identify how this large variation influences physical activity (PA) and sedentary behavior (SB). Free living PA was measured by a waist-worn accelerometer for one week during waking hours in 138 community-dwelling older adults (61.1% women, 80.3 ± 4.9 years) during summer and winter months. In general, SB occupied about 75% of the registered wear-time and was highly correlated with age (β = 0.36). Although the differences were small, more time was spent during the summer in all PA categories, except for the moderate-to-vigorous PA (MVPA), and SB was reduced. More lifestyle PA (LSPA) was accumulated in ≥5-min bouts during summer than winter, especially among highly active participants. This information could be important for policy makers and health professionals working with older adults. Accounting for seasonal difference is necessary in analyzing SB and PA data.
dc.format.extent
dc.language.iso en
dc.relation.ispartofseries International Journal of Environmental Research and Public Health; 14(10)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Árstíðir
dc.subject Öldrun
dc.subject Hreyfing (heilsurækt)
dc.subject Seasonal
dc.subject Aging
dc.subject Physical activity
dc.subject Accelerometer
dc.subject Seasonal
dc.subject Aging
dc.subject Physical activity
dc.subject Accelerometer
dc.subject Public Health, Environmental and Occupational Health
dc.subject Health, Toxicology and Mutagenesis
dc.title Comparison of summer and winter objectively measured physical activity and sedentary behavior in older adults: Age, gene/environment susceptibility Reykjavik study
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article
dc.description.version Peer reviewed
dc.identifier.pmid 29065475
dc.identifier.doi https://doi.org/10.3390/ijerph14101268
dc.relation.url http://www.scopus.com/inward/record.url?scp=85031997788&partnerID=8YFLogxK
dc.contributor.department Faculty of Education
dc.contributor.department Faculty of Health Promotion, Sports and Leisure Studies
dc.contributor.department Faculty of Medicine


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