Journal article
Duration of Physical Activity and Serum 25-hydroxyvitamin D Status of Postmenopausal Women
Annals of epidemiology, Vol.21(6), pp.440-449
06/2011
DOI: 10.1016/j.annepidem.2010.11.011
PMCID: PMC3090482
PMID: 21414803
Abstract
To investigate whether the association between physical activity and serum 25-hydroxyvitamin D (25(OH)D) concentrations is independent of sun exposure, body size, and other potential explanatory variables.
By using data from a sample of 1343 postmenopausal women from the Women’s Health Initiative, we used linear regression to examine the associations of duration (minutes/week) of recreational activity and of yard work with 25(OH)D concentrations (nmol/L).
In age-adjusted analyses, positive associations were observed between 25(OH)D concentrations and both duration of recreational physical activity (β = 0.71, SE [0.09], p <.001) and yard work (β = 0.36, SE [0.10], p = .004). After further adjustment for vitamin D intake, self-reported sunlight exposure, waist circumference, and season of blood draw, 25(OH)D was significantly associated with recreational activity (β = 0.21, SE [0.09], p = .014) but not with yard work (β = 0.18, SE [0.09], p = .061). Interactions were observed between season and both recreational activity (Pinteraction = .082) and yard work (Pinteraction = .038) such that these activity-25(OH)D associations were greater during summer/fall compared with winter/spring. Self-reported sunlight exposure and measures of body size did not modify the associations.
The observed age-adjusted activity-25(OH)D associations were attenuated after adjusting for explanatory variables and were modified by season of blood draw. Adopting a lifestyle that incorporates outdoor physical activity during summer/fall, consuming recommended amounts of vitamin D, and maintaining a healthy weight may improve or maintain vitamin D status in postmenopausal women.
Details
- Title: Subtitle
- Duration of Physical Activity and Serum 25-hydroxyvitamin D Status of Postmenopausal Women
- Creators
- Melissa A Kluczynski - Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, Buffalo, NYMichael J Lamonte - Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, Buffalo, NYJulie A Mares - Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WIJean Wactawski-Wende - Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, Buffalo, NYAshley Wilder Smith - Outcomes Research Branch, Applied Research Program, Cancer Control and Population Sciences, National Cancer Institute, 6130 Bethesda, MDCorinne D Engelman - Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WIChristopher A Andrews - Department of Biostatistics, School of Public Health and Health Professions, University at Buffalo, Buffalo, NYLinda G Snetselaar - Departments of Community and Behavior Health and Epidemiology, College of Public Health, the University of Iowa, Iowa City, IAGloria E Sarto - Department of Obstetrics & Gynecology, University of Wisconsin School of Medicine and Public Health, Madison, WIAmy E Millen - Department of Social and Preventive Medicine, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY
- Resource Type
- Journal article
- Publication Details
- Annals of epidemiology, Vol.21(6), pp.440-449
- DOI
- 10.1016/j.annepidem.2010.11.011
- PMID
- 21414803
- PMCID
- PMC3090482
- NLM abbreviation
- Ann Epidemiol
- ISSN
- 1047-2797
- eISSN
- 1873-2585
- Publisher
- Elsevier Inc
- Grant note
- EY13018 and EY016886 / National Institutes of Health and by Research to Prevent Blindness
- Language
- English
- Date published
- 06/2011
- Academic Unit
- Epidemiology; Internal Medicine
- Record Identifier
- 9983995142802771
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