Sunday! That's (except, you have children) the day of the week, where you can sleep a little bit. Where you roll around in bed, close your eyes again and you can take away an hour or two … But now? Do the doctors want to make even this small Vergiggen madig. "Can your Sunday sleep kill you?" recently headlined the British Daily Mail provocatively, citing an investigation published in the Journal of Clinical Endocrinology and Metabolism (JCEM). This establishes a connection between an increase in sleep on the weekend and an increased risk of diabetes or heart disease. So is it dangerous to sleep longer on weekends or public holidays – and break the usual rhythm in this way? The JCEM study says yes. Because a change in our sleep habits acts like a jet lag on us – more or less as if we had crossed a time zone. The circidian rhythms get off track, we feel sleepier during the day. So unhealthy are changes in sleep patterns And what's more: for the study, the sleep and blood counts of 447 people were monitored during what we find to be a comparatively short period of one week. Those participants whose sleep patterns shifted during the week did not emit "good" cholesterol. However, the production of triglycerides increased. Incidentally, it did not matter whether the subjects slept less or longer – even the change in the sleep habit had a negative effect. Does that mean that we now have to set our alarm clock to 7 o'clock or earlier on weekends? We shiver cold. To reassure: of course we do not have to. Because the investigation proved the connection between changes of the sleep pattern and our blood values. However, she was unable to prove that diabetes or heart disease are the result of this alone. On the contrary. After all, numerous other studies prove that one more hour of sleep has enormous positive effects on our mood and well-being. So we should not worry too much (namely lead to sleep and thus actual health problems!), But compensate for the shortfall during the week by the extra portion of sleep at the weekend. A study by the University of Oxford proves: you sleep on average only five hours during the week, then already 1 1/2 additional hours of sleep on Sunday to make up for the deficit.