The very act of carrying the infant helps the infant to pull out of the flexion it is held comfortably in. In fact the muscle tone in the neck and back is greatly enhanced in babies who are worn. Swaddling an infant and putting it in a cradle works, but it lacks a third and most critical ingredient, letting the infant know he is in the hands of the person who nourishes him both physically and emotionally. An infant who cannot feel or see or hear his caregiver has more stress hormones circulating through his central nervous system. This causes the baby to cry.
Stress irritates the immature digestive system, causing baby to spit up and increases diaper rashes.
Being touched and carried has a positive effect on the digestive system. The sling allows mom to nurse more on demand because the baby is right next to mom. This also reduces breast infections. This puts a strain on the neck, shoulders, and lower back. With our slings, a child can easily be carried until three years old on hip.