Svefn, hreyfing og heilsa íslenskra ungmenna (original) (raw)

2020

Abstract

Background Sleep and physical activity are essential functions of human health. According to International recommendations, adolescents should sleep 8-10 hours each night and engage in moderate to vigorous physical activity for at least 60 minutes per day for overall wellbeing. Previous studies have shown that during adolescence, sleep patterns change and most sleep studies up to date are based on subjective data for sleep duration and quality. Technological advancement in measurement of sleep and physical activity with objective measures adds value to the literature. Aim The main aim of the dissertation was to measure free-living sleep and physical activity in Icelandic youth at baseline (15 years) and two years later (17 years), and explore associations between sleep (duration, quality and timing), physical activity, and body composition. In addition, to compare sensitivity and agreement between subjective and objective measurements of sleep among and between ages of 15 and 17 yea...

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