Magazine

Seit smarte Uhren und Ringe, wie sie Apple, Samsung,  Oura oder auch Garmin in immer größerer Auswahl auf den Markt bringen, unsere Nächte beobachten, haben sich rund um den „Sleep Score" eine Reihe von Missverständnissen etabliert.  Was steckt wirklich dahinter?

Anyone who is too warm or too cold at night sleeps more restlessly – everyone feels that immediately. But temperature is much more than a matter of comfort: it actively controls how deep and restorative our sleep is. Studies have shown for years that the body falls asleep best when it can efficiently release excess heat and the core body temperature slightly drops.

The day was stressful, the mind is racing – and on top of that, cold feet that just won’t warm up. According to a recent study from 2025, this feeling is more than just "uncomfortable": people who are particularly prone to stress-related sleep disorders have consistently colder hands and feet than less susceptible individuals.

Sleep is much more than just rest. The latest meta-analysis from Semmelweis University in Budapest, published in GeroScience (2025), clearly shows how crucial the right amount of sleep is for our life expectancy. Based on data from 79 international studies with over 2.1 million participants, the researchers found that both too little and too much sleep increase the risk of dying earlier – sometimes significantly.