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Open AccessArticle

Comparison of Summer and Winter Objectively Measured Physical Activity and Sedentary Behavior in Older Adults: Age, Gene/Environment Susceptibility Reykjavik Study

1
Faculty of Education, University of Akureyri, Nordurslod 2, 600 Akureyri, Iceland
2
Icelandic Heart Association, Holtasmári 1, 201 Kópavogur, Iceland
3
Research Center of Movement Science, University of Iceland, Stapi v/Hringbraut, 101 Reykjavík, Iceland
4
National Institute of Diabetes and Digestive and Kidney Diseases, Diabetes, Endocrinology, and Obesity Branch, Bethesda, MD 20892, USA
5
CAPHRI Care and Public Health Research Institute, Department of Social Medicine, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
6
Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
7
Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230 Odense M, Denmark
8
Center for Sport and Health Sciences, University of Iceland, Saemundargata 2, 101 Reykjavik, Iceland
9
Department of Sport and Physical Activity, Western Norway University of Applied Science, Bergen 5063, Norway
10
Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Bethesda, MD 20892, USA
11
Faculty of Medicine, School of Health Sciences, University of Iceland, Saemundargata 2, 101 Reykjavik, Iceland
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2017, 14(10), 1268; https://doi.org/10.3390/ijerph14101268
Received: 11 September 2017 / Revised: 12 October 2017 / Accepted: 18 October 2017 / Published: 21 October 2017
(This article belongs to the Collection Aging and Public Health)
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. View Full-Text
Keywords: seasonal; aging; physical activity; accelerometer seasonal; aging; physical activity; accelerometer
MDPI and ACS Style

Arnardottir, N.Y.; Oskarsdottir, N.D.; Brychta, R.J.; Koster, A.; Van Domelen, D.R.; Caserotti, P.; Eiriksdottir, G.; Sverrisdottir, J.E.; Johannsson, E.; Launer, L.J.; Gudnason, V.; Harris, T.B.; Chen, K.Y.; Sveinsson, T. Comparison of Summer and Winter Objectively Measured Physical Activity and Sedentary Behavior in Older Adults: Age, Gene/Environment Susceptibility Reykjavik Study. Int. J. Environ. Res. Public Health 2017, 14, 1268. https://doi.org/10.3390/ijerph14101268

AMA Style

Arnardottir NY, Oskarsdottir ND, Brychta RJ, Koster A, Van Domelen DR, Caserotti P, Eiriksdottir G, Sverrisdottir JE, Johannsson E, Launer LJ, Gudnason V, Harris TB, Chen KY, Sveinsson T. 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. 2017; 14(10):1268. https://doi.org/10.3390/ijerph14101268

Chicago/Turabian Style

Arnardottir, Nanna Yr; Oskarsdottir, Nina Dora; Brychta, Robert J.; Koster, Annemarie; Van Domelen, Dane R.; Caserotti, Paolo; Eiriksdottir, Gudny; Sverrisdottir, Johanna E.; Johannsson, Erlingur; Launer, Lenore J.; Gudnason, Vilmundur; Harris, Tamara B.; Chen, Kong Y.; Sveinsson, Thorarinn. 2017. "Comparison of Summer and Winter Objectively Measured Physical Activity and Sedentary Behavior in Older Adults: Age, Gene/Environment Susceptibility Reykjavik Study" Int. J. Environ. Res. Public Health 14, no. 10: 1268. https://doi.org/10.3390/ijerph14101268

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