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[Physical activity and sleep in Icelandic adolescents].
Rognvaldsdottir V, Valdimarsdottir BM, Brychta RJ, Hrafnkelsdottir SM, Arngrimsson SA, Johannsson E, Chen KY, Gudmundsdottir SL. Rognvaldsdottir V, et al. Among authors: hrafnkelsdottir sm. Laeknabladid. 2018 Feb;104(2):79-85. doi: 10.17992/lbl.2018.02.173. Laeknabladid. 2018. PMID: 29388918 Free PMC article. Icelandic.
Longitudinal Change in Adolescent Bedtimes Measured by Self-Report and Actigraphy.
Brychta RJ, Rögnvaldsdóttir V, Guðmundsdóttir SL, Stefánsdóttir R, Hrafnkelsdóttir SM, Gestsdóttir S, Arngrímsson SA, Chen KY, Jóhannsson E. Brychta RJ, et al. Among authors: hrafnkelsdottir sm. J Meas Phys Behav. 2019 Dec;2(4):282-287. doi: 10.1123/jmpb.2019-0021. J Meas Phys Behav. 2019. PMID: 31799503 Free PMC article.
Sleep deficiency on school days in Icelandic youth, as assessed by wrist accelerometry.
Rognvaldsdottir V, Gudmundsdottir SL, Brychta RJ, Hrafnkelsdottir SM, Gestsdottir S, Arngrimsson SA, Chen KY, Johannsson E. Rognvaldsdottir V, et al. Among authors: hrafnkelsdottir sm. Sleep Med. 2017 May;33:103-108. doi: 10.1016/j.sleep.2016.12.028. Epub 2017 Feb 10. Sleep Med. 2017. PMID: 28449887 Free PMC article.
Barley as a green factory for the production of functional Flt3 ligand.
Erlendsson LS, Muench MO, Hellman U, Hrafnkelsdóttir SM, Jonsson A, Balmer Y, Mäntylä E, Orvar BL. Erlendsson LS, et al. Among authors: hrafnkelsdottir sm. Biotechnol J. 2010 Feb;5(2):163-71. doi: 10.1002/biot.200900111. Biotechnol J. 2010. PMID: 19844912 Free PMC article.
Less screen time and more frequent vigorous physical activity is associated with lower risk of reporting negative mental health symptoms among Icelandic adolescents.
Hrafnkelsdottir SM, Brychta RJ, Rognvaldsdottir V, Gestsdottir S, Chen KY, Johannsson E, Guðmundsdottir SL, Arngrimsson SA. Hrafnkelsdottir SM, et al. PLoS One. 2018 Apr 26;13(4):e0196286. doi: 10.1371/journal.pone.0196286. eCollection 2018. PLoS One. 2018. PMID: 29698499 Free PMC article.