Show simple item record

dc.contributor.authorRognvaldsdottir, Veka
dc.contributor.authorBrychta, Robert J.
dc.contributor.authorHrafnkelsdottir, Soffia M
dc.contributor.authorChen, Kong Y.
dc.contributor.authorArngrimsson, Sigurbjorn Arni
dc.contributor.authorJohannsson, Erlingur
dc.contributor.authorGudmundsdottir, Sigridur Lara
dc.identifier.citationRognvaldsdottir, V., Brychta, R. J., Hrafnkelsdottir, S. M., Chen, K. Y., Arngrimsson, S. A., Johannsson, E., & Guðmundsdottir, S. L. (2020). Less physical activity and more varied and disrupted sleep is associated with a less favorable metabolic profile in adolescents. Plos One, 15(5).en_US
dc.description.abstractBackground 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, and metabolic risk factors among adolescents are limited. Objective The aim of the study was to examine the association between metabolic risk factors and objectively measured school day physical activity and sleep duration, quality, onset, and variability in adolescents. Materials and methods We measured one school week of free-living sleep and physical activity with wrist actigraphy in 252 adolescents (146 girls), aged 15.8±0.3 years. Metabolic risk factors included body mass index, waist circumference, total body and trunk fat percentage, resting blood pressure, and fasting glucose and insulin levels. Multiple linear regression adjusted for sex, parental education, and day length was used to assess associations between metabolic risk factors and sleep and activity parameters. Results On average, participants went to bed at 00:22±0.88 hours and slept 6.2±0.7 hours/night, with 0.83±0.36 hours of awakenings/night. However, night-to-night variability in sleep duration was considerable (mean ± interquartile range) 0.75±0.55 hours) and bedtime (0.64±0.53 hours) respectively. Neither average sleep duration nor mean bedtime was associated with any metabolic risk factors. However, greater night-to-night variability in sleep duration and bedtime was associated with higher total body and trunk fat percentage, and less physical activity was associated with higher trunk fat percentage and insulin levels. Conclusion Greater nightly variation in sleep duration and in bedtime and less physical activity were associated with a less favorable metabolic profile in adolescents. These findings support the idea that, along with an adequate amount of physical activity, a regular sleep schedule is important for the metabolic health of adolescents.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleLess physical activity and more varied and disrupted sleep is associated with a less favorable metabolic profile in adolescentsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2020 Rognvaldsdottir et al.en_US
dc.source.journalPLOS ONEen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal