Purpose
First evidence suggests that chronobiological aspects of sleep restriction affect metabolic conditions. Our aim was to investigate whether spontaneous free-living physical activity likewise is affected by chronobiological timing of short sleep.

Methods
In an experimental randomized, balanced cross-over design, eleven healthy, normal-weight (BMI: 23.9 ± 0.4 kg/m2) men were evaluated. Physical activity was assessed by tri-axial wrist actigraphy after (i) four-hour sleep during the first night-half of the night (‘late night sleep loss’), (ii) four-hour sleep during the second night-half (‘early night sleep loss’), and (iii) eight-hour regular sleep (‘regular sleep’), from 7:00 to 24:00 (17 h). Feelings of tiredness and activity were measured by semi-quantitative questionnaires.

Results
Physical activity differed between sleep conditions (P < 0.05) with the lowest physical activity after ‘late night sleep loss’. Accordingly, less time was spent in high-intensity physical activity after ‘late night sleep loss’ as compared to the ‘early night sleep loss’ and ‘regular sleep’ conditions (both P < 0.05). Perceived feelings of tiredness were higher after both short sleep conditions as compared to ‘regular sleep’ (both P < 0.05).

Conclusions
Sleep restriction during the second half of the night elicits stronger effects on spontaneous physical activity than sleep restriction during the first half of the night despite identical sleep duration, but the impact of longer period awake needs to be evaluated in further research. In sum, these data indicate that not only short sleep per se but also chronobiological aspects modulate physical activity pattern.

Direct Link: https://doi.org/10.1016/j.physbeh.2019.112795

Journal: Physiology & Behavior. 2020 Mar 1;215:112795

Keywords: Chronobiology, Physical Activity, sleep restriction,

Applications: Physical Activity,

CamNtech Reference: M20032

Back to Search Results

UK & International customers

CamNtech Ltd.
Manor Farm
Fenstanton
Cambridgeshire
PE28 9JD, UK

US customers

CamNtech Inc.
630 Boerne Stage Airfield,
Boerne,
Texas 78006,
USA

Copyright

© 2020 CamNtech Ltd and CamNtech Inc

Company information

Registered in England No. 2221302
VAT No: GB486 3019 34


Privacy Policy