ArticleScientific reports2018
Day length is associated with physical activity and sedentary behavior among older women.
Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
10 citing papers in PubMed.
- Bidirectional associations between sleep and physical activity investigated using large-scale objective monitoring data.Communications medicine · 2025Article
- Seasonality in mood disorders: Probing association of accelerometer-derived physical activity with daylength and solar insolation.PLOS mental health · 2024Article
- The relationship of weather with daily physical activity and the time spent out of home in older adults from Germany - the ActiFE study.European review of aging and physical activity : official journal of the European Group for Research into Elderly and Physical Activity · 2022Article
- Article
- Seasons, weather, and device-measured movement behaviors: a scoping review from 2006 to 2020.The international journal of behavioral nutrition and physical activity · 2021Article
- Impacts of ambient temperature and seasonal changes on sports injuries in Madrid, Spain: a time-series regression analysis.BMJ open sport & exercise medicine · 2021Article
- Use of Connected Technologies to Assess Barriers and Stressors for Age and Disability-Friendly Communities.Frontiers in public health · 2021Review
- Seasonal Changes in Continuous Sedentary Behavior in Community-Dwelling Japanese Adults: A Pilot Study.Medicines (Basel, Switzerland) · 2020Article
- Changes in rural older adults' sedentary and physically-active behaviors between a non-snowfall and a snowfall season: compositional analysis from the NEIGE study.BMC public health · 2020Article
- Article
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Physical activity may be influenced by one's physical environment, including day length and weather. Studies of physical activity, day length, and weather have primarily used self-reported activity, broad meteorological categorization, and limited geographic regions. We aim to examine the association of day length and physical activity in a large cohort of older women, covering a wide geographic range. Participants (N = 16,741; mean (SD) age = 72.0 (SD = 5.7) years) were drawn from the Women's Health Study and lived throughout the United States. Physical activity was assessed by accelerometer (ActiGraph GT3X+) between 2011 and 2015. Day length and weather information were obtained by matching weather stations to the participants' location using National Oceanic and Atmospheric Administration databases. Women who experienced day lengths greater than 14 hours had 5.5% more steps, 9.4% more moderate-to-vigorous physical activity, and 1.6% less sedentary behavior, compared to women who experienced day lengths less than 10 hours, after adjusting for age, accelerometer wear, temperature, and precipitation. Day length is associated with physical activity and sedentary behavior in older women, and needs to be considered in programs promoting physical activity as well as in the analyses of accelerometer data covering wide geographic regions.
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Registered trials
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