The University of Sussex and Thrive Learning Technology Company have released the first UK medical trial of a 4-day workweek.
The study was conducted over a three-month period between July 2024 and October 2024. It examined the impact a shorter working week has on employee productivity and wellbeing.
MRI scans and blood tests were collected, along with weekly questionnaires about workplace experience and wellbeing, from Thrive’s employees. Customer feedback was used to assess any changes in the service quality. Sales and product metrics were also measured to measure business productivity.
The benefits of a shorter week on your health
The trial showed that participants’ physical and mental health had improved significantly. The psychological detachment of work, which is a key indicator for work-life balance rose by 22,5 percent. Overall wellbeing improved by 21 percent while sleep issues were reduced by 20%.
Sleep quality increased by 6.2 per cent, while perceived stress dropped by 8.6 per cent. Burnout due to emotional exhaustion dropped by 14.7%, while depersonalisation burnout decreased slightly by 2.3 percent. The feeling of accomplishment increased by 11.4%. Anxiety symptoms decreased by 5 percent. Stress and depression levels also declined.
Charlotte Rae said, “The results are clear”. She is the Research Lead at University of Sussex. These significant improvements in areas of physical and mental well-being demonstrate the transformative powers of a four day work week. Sleep quality, stress reduction and fatigue reduction are all factors that can have a positive impact on your health and improve both the work and home life. This study is further evidence of the benefits that flexible working models can bring.”
Productivity and Customer Service
The task execution was consistent despite the reduction in hours. Staff reported a 19.4 % increase in goal achievement and a 9.3 % rise in self efficacy. They also expressed greater confidence and improved goal attainment than before the trial period.
The overall productivity metrics were positive. However, maintaining consistency in customer service was a challenge, since the British public expects the same level of service during the traditional five-day work week. This prompted Thrive, moving forward, to consider a seasonally implemented four-day week.
Cassie Gasson is the Co-CEO of Thrive. She said, “Our four-day trial showed incredibly encouraging results. We saw a fantastic effect on our people.” While we would have liked to implement the four-day week on a permanent basis, the results of the trial showed that the success will depend on a widespread cultural shift across the UK’s business landscape. It was clear that as a company serving hundreds of companies, five-day coverage is crucial for customers who are still working in a traditional way.
“New flexible work guidelines are a good start, but UK government should also consider policies that could make a four day work week a real possibility. It will allow more businesses to make the transition. It is evident that the benefits of a four-day week are obvious, as it can boost productivity and wellbeing and make the UK happier and healthier.
“Until then, we find it difficult to commit to full-time and will consider a more flexible approach to seasonal work to support the proven benefits.”
