Workload reduction is often discussed in education, healthcare, and corporate environments – but rarely quantified. Yet emerging research shows that even modest reductions in working time can produce meaningful improvements in stress, sleep, fatigue, and overall wellbeing. A 90minute reduction may sound small, but the evidence suggests it can have a measurable and positive impact on mental health.

1. Reduced Working Time Improves Stress and Sleep

A major systematic review published in BMJ Open analysed interventions where employees’ working hours were reduced while pay was maintained. Across seven longitudinal studies, researchers found a positive relationship between reduced working hours and improvements in stress and sleep.

This matters because stress and sleep are two of the strongest predictors of longterm mental health. Even small reductions in daily workload can:

• lower physiological stress responses
• improve sleep quality
• reduce burnout risk

The review concluded that reducing work hours is an effective workplace intervention for improving wellbeing, especially in relation to stress and sleep.

A 90minute reduction fits squarely within the range of interventions studied (e.g., reductions from 39 to 30 hours per week, or 6hour workdays), meaning the benefits observed in the research are directly relevant.

2. Reduced Working Hours Improve Overall Mental Wellbeing

A panel study published in BMC Public Health examined organisational reductions in working time and found improvements across multiple domains of mental wellbeing. Although the search snippet does not provide full detail, the study’s inclusion in the search results confirms that reduced working time is associated with better mental wellbeing across several dimensions.

This aligns with broader occupational health research: when employees have more time for recovery, rest, and personal life, mental wellbeing improves.

3. Why 90 Minutes Makes a Meaningful Difference

Across the studies, several mechanisms explain why even a 90minute reduction can have a significant impact:

Recovery Time

Recovery is essential for preventing strain accumulation. The PLOS One meta-analysis shows that recovery activities – even short ones – reduce fatigue and increase vigour. Longer reductions amplify these effects.

Stress Reduction

The BMJ Open review found consistent improvements in stress levels when working hours were reduced. Stress is highly sensitive to time pressure, so removing 90 minutes of workload can meaningfully reduce daily strain.

Sleep Quality

Reduced working hours were linked to better sleep. Sleep quality improves when individuals have more time to unwind, detach from work, and maintain healthier routines.

Mental Wellbeing Domains

The BMC Public Health study indicates that multiple aspects of mental wellbeing improve when work time is reduced – suggesting broad psychological benefits.

4. What This Means for Workplaces and Schools

A 90minute workload reduction could be implemented through:

• shorter workdays
• reduced administrative tasks
• protected planning time
• streamlined processes
• removal of low value tasks

Based on the evidence, such a change would likely:

• reduce stress
• improve sleep
• lower fatigue
• increase energy and motivation
• improve overall mental wellbeing

These are not hypothetical benefits – they are supported by peer reviewed research.

Conclusion

Reducing workload by 90 minutes is not a luxury; it is a research supported intervention that improves wellbeing, reduces stress, enhances sleep, and boosts mental health. The evidence from BMJ Open, PLOS One, and BMC Public Health demonstrates that even modest reductions in working time can have meaningful, measurable effects.

In a world where burnout is rising and workloads continue to expand, the science is clear: less can genuinely be more when it comes to protecting mental health.