Experts agree that people are sleeping less and less, including on weekends. Between housework, shopping and socialising, it’s not always easy to get a good night’s rest on Saturdays and Sundays.

Yet, according to a German study, getting enough sleep on days off can help us get back into the swing of the working week.

Researchers at the University of Mannheim have investigated how sleep quality over the weekend influences employees’ ability to mentally reconnect with their work on Monday and to be productive throughout the week.

Many working people find it difficult to get back into their work on Monday morning after being away from the office for 48 hours. Some even adopt aggressive attitudes on the day, which ease off as the week progresses, according to a paper published in 2021 in the Journal of Applied Psychology.

For some, this phenomenon is even pathological: researchers refer to it as “Monday-morning syndrome”, a phenomenon characterised by, among other things, a lack of energy, irritability, and difficulty concentrating.

While the existence of this syndrome is disputed, there is no doubt that workers need to undergo a process of psychological reattachment – that is, mentally reconnecting with their professional goals – after the weekend.

The authors of this research, published in the Journal of Organizational Behavior, suggest that working people find it less difficult to reconnect with work on Monday when they’ve slept well over the weekend.

To test this hypothesis, they monitored 310 German employees over a five-week period. They were asked to answer a questionnaire on their sleep quality and work reattachment on Monday, followed on Friday by another questionnaire about their level of fatigue and performance throughout the week.

It turns out that volunteers who had rested sufficiently over the weekend had less difficulty getting down to work on Monday morning. Conversely, those who had not slept enough on their days off found it harder to get back into the swing of things.

Surprisingly, workers who had not slept enough on Saturday and Sunday because of social obligations seemed not to experience this effect. They were able to get back into their work on Monday morning, despite their sleep deficit, suggesting that socialising has a buoyant effect.

The study’s co-authors also noted that the fatigue accumulated over the weekend did not directly affect employees’ performance. But, given that exhaustion is detrimental to long-term efficiency, it’s important to make rest a priority.

Indeed, this is why it’s important to get enough rest on Saturday and Sunday: sleep is the key to making Monday a satisfying and productive day, rather than the worst day of the week.