The older your baby will be sinewy, the more he will be able to move at will by leaning on and helping his various limbs, which reduces the risk of sudden death.

The muscles most used to straighten up are those of the neck, back, and arms. During play sessions with your baby, take the opportunity to develop these muscle areas by putting it on the stomach. If he finds himself in difficulty in his bed, he will thus be able to extricate himself more easily.