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Browsing by Author "Johannsson, Erlingur"

Browsing by Author "Johannsson, Erlingur"

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  • Brychta, Robert J.; Arnardottir, Nanna Yr; Johannsson, Erlingur; Wright, Elizabeth C.; Eiriksdottir, Gudny; Gudnason, Vilmundur; Marinac, Catherine R.; Davis, Megan; Koster, Annemarie; Caserotti, Paolo; Sveinsson, Thorarinn; Harris, Tamara; Chen, Kong Y. (2016-02-15)
    Study Objectives: To identify cross-sectional and seasonal patterns of sleep and physical activity (PA) in community-dwelling, older Icelandic adults using accelerometers. Methods: A seven-day free-living protocol of 244 (110 female) adults aged 79.7 ...
  • Rögnvaldsdóttir, Vaka; Brychta, Robert; Hrafnkelsdóttir, Soffía M.; Chen, Kong Y.; Arngrímsson, Sigurbjörn Árni; Johannsson, Erlingur; Gudmundsdottir, Sigridur Lara (Public Library of Science (PLoS), 2020-05-15)
    Background: Sleep and physical activity are modifiable behaviors that play an important role in preventing overweight, obesity, and metabolic health problems. Studies of the association between concurrent objective measures of sleep, physical activity, ...
  • Gudmundsdottir, Sigridur Lara; Hrafnkelsson, Hrafn; Sigurdsson, Engilbert; Johannsson, Erlingur (Cambridge University Press (CUP), 2020-03-19)
    Objective: The aim of the study was to assess the potential association between serum 25-hydroxyvitamin D (25(OH)D) and whole-body bone mineral density (BMD) among 16-year-old adolescents and to study the prevalence of 25(OH)D insufficiency, defined ...