Media release

From: Flinders University

Late nights, alcohol, and smoking on weekends may be doing more than disrupting your Monday mornings, they could be triggering a newly identified sleep health concern known as ‘social apnea’, warn researchers from Flinders University.

Published in the prestigious American Journal of Respiratory and Critical Care Medicine, the international study introduces social apnea as a novel trend in sleep medicine referring to the weekend spike in Obstructive Sleep Apnea (OSA) severity, driven by lifestyle choices and irregular sleep patterns.

The research, which analysed data from over 70,000 people worldwide, found a consistent and significant increase in OSA severity on weekends. Experts from FHMRI Sleep Health FHMRI Sleep Health coined the term ‘social apnea’ to describe this phenomenon.

“Sleep apnea is already a major public health issue, but our findings suggest its true impact may be underestimated,” says lead author and Research Fellow Dr Lucia Pinilla from FHMRI Sleep Health.

“Most clinical diagnostic testing is done on a single night, typically a weeknight, missing the weekend effect we’re now calling social apnea.”

Dr Pinilla explains that this weekend surge in sleep-disordered breathing may heighten the risk of serious health conditions including heart disease, depression, dementia, and extreme fatigue and motor vehicle and other accidents.

The study found that participants were 18% more likely to have moderate to severe OSA on weekends (Saturdays) when compared to mid-week (Wednesdays).

Changes in sleep schedules, such as staying up late on weekends or sleeping in, worsened sleep apnea.

Sleeping an extra 45 minutes or more on weekends increased the risk of worse sleep apnea by 47%. Men were 21% more likely to be affected, compared to a 9% increase in women.

Younger adults (under 60) had a 24% higher risk on weekends, compared to 7% in those aged 60 and above.

Matthew Flinders Professor Danny Eckert, Director of FHMRI Sleep Health and senior author on the paper says this is the first evidence that OSA severity increases at the weekend.

“We don’t yet know exactly why, but alcohol use, lighter sleep, and less consistent use of OSA therapies likely play a role.”

Dr Bastien Lechat, lead author of a separate article just published in the prestigious Nature’s Communications Medicine journal says similar mechanisms may drive seasonal variability in OSA severity.

“OSA tends to be worse during summer and winter, with severity increasing by 8–19% compared to spring and autumn,” says Dr Lechat.

“This seasonal spike is partly explained by higher temperatures, which disrupt sleep and lead to lighter sleep stages which is associated with worse OSA. In winter, longer sleep and later wake up times, increase time spent in REM sleep, which is also linked to more frequent apnea events.”

Professor Eckert says that these findings align with the concept of ‘social apnea’ and highlight the need for multi-night sleep assessments and more personalised approaches to diagnosis and treatment.

“Relying on a single-night sleep study may miss important variations, leading to underdiagnosis or misclassification of OSA severity,” says Professor Eckert.

To combat ‘social apnea’, Professor Eckert recommends maintaining a regular sleep routine.

“Try to keep the same sleep schedule throughout the week and weekend, ensuring that you get the recommended 7-9 hours of sleep a night,” he says.

“Keeping a fixed wake-up time and using your prescribed OSA therapy, even on weekends, and going to bed when you feel sleepy will help ensure you frequently get enough restorative sleep which can help combat the weekend spike in OSA.”

OSA is a common sleep disorder affecting around one billion people globally. It is caused by repeated airway collapse during sleep and, if untreated, increases the risk of heart disease, diabetes, cognitive decline, depression, and even death. People concerned about their sleep should speak with their GP.

The American Journal of Respiratory and Critical Care Medicine article, ‘”Social apnea”: Obstructive sleep apnea is exacerbated on weekends’ by Lucía Pinilla, Bastien Lechat, Hannah Scott, Amy C Reynolds, Jack Manners, Kelly Sansom (Mudoch University), Robert Adams, Pierre Escourrou (Centre Interdisciplinaire du Sommeil, France) Peter Catcheside and Danny J Eckert to be first published on 13 August 2025 11pm AEST. DOI: 10.1164/rccm.202505-1184RL

The Nature Communications Medicine article, “Obstructive sleep apnea severity varies by season and environmental influences such as ambient temperature” by Bastien Lechat, Duc Phuc Nguyen, Kelly Sansom(Mudoch University), Lucia Pinilla, Hannah Scott, Amy C. Reynolds, Andrew Vakulin, Jack Manners, Robert J. Adams, Jean-Louis Pepin (Univ. Grenoble Alpes), Pierre Escourrou (Centre Interdisciplinaire du Sommeil, France), Peter Catcheside and Danny J. Eckert was first published on 29 July 2025. DOI: 10.1038/s43856-025-01016-0

Acknowledgements: BL is supported by a National Health and Medical Research Council (NHMRC) of Australia Emerging Leadership Fellowship (2025886). ACR is supported by an Australian Research Council Discovery Early Career Researcher Award (250101060). DJE is supported by an NHMRC Leadership Fellowship (1196261)