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Association between Chronotype and Physical Behaviours in Adolescent Girls

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posted on 2023-07-19, 07:38 authored by T Plekhanova, E Crawley, MJ Davies, T Gorely, DM Harrington, E Ioannidou, K Khunti, AV Rowlands, LB Sherar, T Yates, CL Edwardson
The aim of this study was to (1) describe accelerometer-assessed physical behaviours by chronotype, and (2) examine the association between chronotype and accelerometer-assessed physical behaviours in a cohort of adolescent girls. Chronotype (single question) and physical behaviours (GENEActiv accelerometer on the non-dominant wrist) were assessed in 965 adolescent girls (13.9 ± 0.8 years). Linear mixed-effects models examined the relationships among chronotype and physical behaviours (time in bed, total sleep time, sleep efficiency, sedentary time, overall, light and moderate-to-vigorous physical activity) on weekdays and weekend days. Over the 24 h day, participants spent 46% sedentary, 20% in light activity, 3% in moderate-to-vigorous physical activity, and 31% in ‘time in bed’. Seventy percent of participants identified as ‘evening’ chronotypes. Compared to evening chronotypes, morning chronotypes engaged in less sedentary time (10 min/day) and had higher overall physical activity (1.3 mg/day, ~30 min of slow walking) on weekdays. Most girls identified as evening chronotypes with a large proportion of their day spent sedentary and a small amount in physical activities which may be exacerbated in evening chronotypes on weekdays. The results maybe be important for programmes aiming to promote physical activity in adolescent girls.

Funding

The randomised controlled trial was funded by the NIHR Public Health Research programme (13/90/30). The research was also supported by the NIHR Leicester Biomedical Research Centre, which is a partnership between University Hospitals of Leicester NHS Trust, Loughborough University, and the University of Leicester.

History

Author affiliation

Diabetes Research Centre, University of Leicester

Version

  • VoR (Version of Record)

Published in

Children

Volume

10

Issue

5

Pagination

819

Publisher

MDPI

issn

2227-9067

eissn

2227-9067

Copyright date

2023

Available date

2023-07-19

Spatial coverage

Switzerland

Language

eng

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