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Sleep extension and metabolic health in male overweight/obese short sleepers: A randomised controlled trial

journal contribution
posted on 13.05.2022, 14:17 by Iuliana HartescuIuliana Hartescu, David StenselDavid Stensel, Alice ThackrayAlice Thackray, James KingJames King, James Dorling, Eva Rogers, Andrew P Hall, Emer M Brady, Melanie J Davies, Thomas Yates, Kevin Morgan

While limited evidence suggests that longer sleep durations can improve metabolic health in habitual short sleepers, there is no consensus on how sustained sleep extension can be achieved. A total of 18 men (mean [SD] age 41 [9] years), who were overweight/obese (mean [SD] body mass index 30 [3] kg/m2) and short sleepers at increased risk of type 2 diabetes were randomised to a 6-week sleep-extension programme based on cognitive behavioural principles (n = 10) or a control (n = 8) group. The primary outcome was 6-week change in actigraphic total sleep time (TST). Fasting plasma insulin, insulin resistance (Homeostatic Model Assessment for Insulin Resistance [HOMA-IR]), blood pressure, appetite-related hormones from a mixed-meal tolerance test, and continuous glucose levels were also measured. Baseline to 6-week change in TST was greater in the sleep-extension group, at 79 (95% confidence interval [CI] 68.90, 88.05) versus 6 (95% CI −4.43, 16.99) min. Change in the sleep-extension and control groups respectively also showed: lower fasting insulin (−11.03 [95% CI −22.70, 0.65] versus 7.07 [95% CI −4.60, 18.74] pmol/L); lower systolic (−11.09 [95% CI −17.49, −4.69] versus 0.76 [95% CI −5.64, 7.15] mmHg) and diastolic blood pressure (−12.16 [95% CI −17.74, −6.59] versus 1.38 [95% CI −4.19, 6.96] mmHg); lower mean amplitude of glucose excursions (0.34 [95% CI −0.57, −0.12] versus 0.05 [95% CI −0.20, 0.30] mmol/L); lower fasting peptide YY levels (−18.25 [95%CI −41.90, 5.41] versus 21.88 [95% CI −1.78, 45.53] pg/ml), and improved HOMA-IR (−0.51 [95% CI −0.98, −0.03] versus 0.28 [95% CI −0.20, 0.76]). Our protocol increased TST and improved markers of metabolic health in male overweight/obese short sleepers.


Loughborough University

NIHR Leicester Biomedical Research Centre



  • Sport, Exercise and Health Sciences

Published in

Journal of Sleep Research








AM (Accepted Manuscript)

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© European Sleep Research Society

Publisher statement

This is the peer reviewed version of the following article: Hartescu, I., Stensel, D. J., Thackray, A. E., King, J. A., Dorling, J. L., Rogers, E. N., Hall, A. P., Brady, E. M., Davies, M. J., Yates, T., & Morgan, K. (2022). Sleep extension and metabolic health in male overweight/obese short sleepers: A randomised controlled trial. Journal of Sleep Research, 31, e13469., which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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Dr Iuliana Hartescu. Deposit date: 12 May 2022

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