Sleep, Stress and the Hidden Cost of Fatigue in Asia’s Workforce

With World Sleep Day falling on 16 March and April marking Stress Awareness Month, it is an opportune time to take a closer look at an often-overlooked issue in Asia’s workplaces: fatigue driven by chronic sleep deprivation and sustained stress. Increasingly, fatigue is not just a wellbeing concern, but a people risk with real implications for performance, safety and resilience.

A region running on too little sleep

Across many parts of Asia, long working hours are commonly a workplace norm, and are deeply ingrained in workplace culture. In many organisations, staying late tends to be viewed as a badge of dedication, while the importance of rest may receive far less attention. However, a growing body of evidence now challenges this status quo, urging us to reconsider these commonly held beliefs.

According to joint estimates by the World Health organisation (WHO) and the International Labour organisation (ILO), the Western Pacific and South-East Asia regions record the highest prevalence of long working hours globally1. When working hours increase, sleep is almost always the first casualty, and the consequences extend far beyond temporary tiredness.

Why this matters across Asia: a snapshot by market

Here is how the data looks across key markets in the region:

This demographic and behavioural shift is clearly no longer theoretical, and it is already reshaping the modern workplace in measurable ways. At the individual level, there are far-reaching implications for both mental wellbeing and physical health, including a higher risk of cardio-metabolic issues such as an increased risk of hypertension, cardiovascular disease and Type 2 diabetes⁸.

This also has implications in the workplace. A growing number of employees are arriving at work carrying accumulated fatigue, both mental and physical, which affects their focus, decision-making, and overall performance. Teams are increasingly operating below their optimal cognitive capacity, resulting in slower problem-solving, reduced creativity, and weaker collaboration.

As these patterns become more visible, organisations are under mounting pressure to respond. What was once seen as an individual concern is now recognised as a broader, systemic challenge. Addressing it will require deliberate, organisation-wide efforts to support employee wellbeing while maintaining performance and productivity.
 

Stress and sleep: a cycle that compounds

Stress Awareness Month draws attention to a dynamic that many HR professionals will recognise: stress and poor sleep do not simply coexist; they actively reinforce one another.

High workloads and extended working hours elevate cortisol levels, making it more difficult for people to disengage and fall asleep. In turn, insufficient or disrupted sleep impairs emotional regulation and reduces resilience to stress, making the demands of the following day more difficult to manage. For employees caught in this cycle, each week becomes progressively harder to sustain as the ill effects continue to compound.

Research from Japan illustrates these stakes with particular clarity. Employees who experience a gap of more than two hours between their desired and actual sleep duration are significantly more likely to develop symptoms of depression and anxiety³, conditions that carry serious consequences for both individual wellbeing and organisational performance.

Importantly, this is not a question of individual resilience or coping capacity. It reflects a broader structural issue, arising when work design and cultural expectations consistently prioritise output over recovery.

Fatigue as a potential workforce risk beyond personal wellbeing

Fatigue is frequently underestimated because it develops gradually and is often mistaken for ordinary tiredness. Physiologically, however, it represents a distinct state that impairs attention, decision-making, reaction time, and emotional regulation.

Research across the region consistently links long working hours and insufficient sleep to cumulative fatigue, particularly in high-demand sectors such as healthcare, manufacturing, and transport⁹. It also highlights the prevalence of sleep disturbances and daytime dysfunction even among non-shift workers¹⁰, as well as elevated rates of workplace accidents and errors, especially in safety-critical environments¹¹.

This vicious cycle is not a failure of individual coping, it is often the result of fatigue from systemic work design and cultural expectations.

It is about designing or redesigning work so that adequate rest is genuinely possible, and recovery is consistently valued.
 

References

¹  WHO/ILO (2021). Long working hours increasing deaths from heart disease and stroke.  https://www.who.int/news/item/17-05-2021-long-working-hours-increasing-deaths-from-heart-disease-and-stroke-who-ilo 
² Frontiers in Public Health (2024). Prevalence and associated factors of burnout among working adults in Southeast Asia. https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2024.1326227/full  
³ HRM Asia. Japan struggles to address work-life balance issues.  https://hrmasia.com/japan-struggles-to-address-work-life-balance-issues/  
⁴ Unseen Japan. Japan and sleep deprivation. https://unseen-japan.com/japan-sleep-deprivation/
⁵  The Standard (2022). 35pc HK employees are on the job an average of 50 hours per week, study shows.  https://www.thestandard.com.hk/news/article/189611/
⁶  The Lancet Western Pacific. Working hours and health in the Asia-Pacific.   https://www.thelancet.com/journals/lanwpc/article/PIIS2666-6065%2821%2900108-5/fulltext
⁷  SciSpace (PDF). Relationship between long work hours and self-reported sleep and fatigue symptoms (employees working >52 hours/week show higher odds of insomnia and waking fatigued).  https://scispace.com/pdf/relationship-between-long-work-hours-and-self-reported-sleep-3p4294nlpr.pdf
⁸  Channel NewsAsia (2025). Many in Singapore struggle to get a good night's sleep – and this is detrimental not just to the individual. https://www.channelnewsasia.com/today/big-read/sleep-deprivation-health-productivity-risks-4862566  
⁹  Frontiers in Public Health (2023). Cumulative fatigue in high-demand occupations.  https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2023.1193942/full
¹⁰  Fatigue Managers Network / Qiu et al. (2022). Long working hours, work-related stressors and sleep disturbances.  https://fatiguemanagersnetwork.org/wp-content/uploads/Qiu-et-al.2022_Long-Working-Hours-Work-Related-Stressors-and-Sleep-Disturbances.pdf 
¹¹  Ministry of Manpower (2019). Restrictions on working hours protect employees from fatigue.  https://www.mom.gov.sg/newsroom/press-replies/2019/0508-restrictions-on-working-hours-protect-employees-from-fatigue
¹²  HRD Asia (2024). Singapore employees losing over 60 working days from anxiety, sleep disorders (TELUS Health Mental Health Index). https://www.hcamag.com/asia/specialisation/mental-health/singapore-employees-losing-over-60-working-days-from-anxiety-sleep-disorders/475047