Organized Sport Participation, Physical Activity, Sleep and Screen Time in 16-Year-Old Adolescents

by Elvar S. Saevarsson, Vaka Rognvaldsdottir, Runa Stefansdottir, Erlingur Johannsson
Published 2021-03-01

Different cardiorespiratory fitness expressions based on the maximal cycle ergometer test show no effect on the relation of cardiorespiratory fitness to the academic achievement of...

by Elvar Saevarsson, Erla Svansdottir, Sigurbjorn Arngrimsson, Thorarinn Sveinsson, Erlingur Johannsson
Published 2018-01-01

Different factors associate with body image in adolescence than in emerging adulthood: A gender comparison in a follow-up study

by Sunna Gestsdottir, Erla Svansdottir, Hedinn Sigurdsson, Arsaell Arnarsson, Yngvar Ommundsen, Sigurbjorn Arngrimsson, Thorarinn Sveinsson, Erlingur Johannsson
Published 2017-11-01

Less physical activity and more varied and disrupted sleep is associated with a less favorable metabolic profile in adolescents.

by Vaka Rognvaldsdottir, Robert J Brychta, Soffia M Hrafnkelsdottir, Kong Y Chen, Sigurbjorn A Arngrimsson, Erlingur Johannsson, Sigridur L Guðmundsdottir
Published 2020-01-01

Less screen time and more frequent vigorous physical activity is associated with lower risk of reporting negative mental health symptoms among Icelandic adolescents.

by Soffia M Hrafnkelsdottir, Robert J Brychta, Vaka Rognvaldsdottir, Sunna Gestsdottir, Kong Y Chen, Erlingur Johannsson, Sigridur L Guðmundsdottir, Sigurbjorn A Arngrimsson
Published 2018-01-01

Association between free-living sleep and memory and attention in healthy adolescents

by Runa Stefansdottir, Hilde Gundersen, Vaka Rognvaldsdottir, Alexander S. Lundervold, Sunna Gestsdottir, Sigridur L. Gudmundsdottir, Kong Y. Chen, Robert J. Brychta, Erlingur Johannsson
Published 2020-10-01

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

by Nanna Yr Arnardottir, Nina Dora Oskarsdottir, Robert J. Brychta, Annemarie Koster, Dane R. van Domelen, Paolo Caserotti, Gudny Eiriksdottir, Johanna E. Sverrisdottir, Erlingur Johannsson, Lenore J. Launer, Vilmundur Gudnason, Tamara B. Harris, Kong Y. Chen, Thorarinn Sveinsson
Published 2017-10-01