If you wake up at dawn between 3 a.m. and 5 a.m., this is a clear signal from your body

as the sleep hormone, plays a central role in falling asleep. However, exposure to screens in the evening slows down its production. Phone, tablet or television send the brain a signal of alertness while it should prepare for rest. Reduce screen time before bedtime, or activate a warm light mode, helps the body sync with the night rhythm.

Stress, on the other hand, stimulates cortisol, a hormone that keeps the body on alert. When its level remains high at night, sleep becomes lighter and unstable. Hence the importance of managing stress upstream, throughout the day, and not only at bedtime.