Even when the air becomes heavy and temperatures exceed 30 ° C, many continue to fall asleep under a duvet. Incomprehensible? Not really. Science explains why this gesture, far from trivial, triggers a real relaxation mechanism.
The science of physiological cocooning
Sleeping with a duvet, a sheet or even a weighted blanket meets a deeply rooted need. It is to stimulate the parasympathetic nervous system, responsible for the slowdown in heart rate and muscle relaxation.
In 2011, a team from the Anesthesiology Department of the University of California demonstrated that “The soft and constant pressure of the covers, similar to the effect of a weighted blanket, can help relieve chronic pain and improve the quality of sleep “.
According to the researchers, “This feeling of active well-being The parasympathetic nervous system, responsible for the decrease in heart rate, relaxation and relaxation“. This network acts as a natural brake after an intense day. It sends a clear signal to the body: it is time to recover.
This pressure recalls acupressure or massage. It stimulates touch, muscles and joints, while promoting the release of serotonin, which promotes well-being, and melatonin, for falling asleep.
A reassuring ritual for the mind
Other works carried out by scientists from Flinders and Adelaide universities in Australia show that this habit could also be linked to personality.
Indeed, some sleepers are more sensitive to stress. They would therefore unconsciously seek this feeling of emotional security. With them, the wrap by a cover plays a key role in sleeping. But not only. This habit also would have an impact on the maintenance of a deep sleep.
In addition, psychological effects go beyond simple comfort. In some cases, the use of coverage can reduce symptoms of anxiety and depression. What means? Simply by helping the body to release its tensions before the falling phase.
Weighted covers, between promises and limits
Popular with parents of children with ADHD or autistic spectrum disorder, weighted covers have become a privileged tool to appease and facilitate sleep. Their weight exerts a uniform pressure which triggers an immediate cocoon effect.
But the researchers remain cautious: if some derive great benefit, others may feel discomfort, even increased anxiety.
What specialists confirm is that attachment to coverage exceeds the simple temperature question. Even in the heat wave, therefore.