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There is only a small window of opportunity to correct the infantâs skull. As the rate of skull growth is faster in the early ages, helmet therapy is most effective between the ages of 3 to 7 months. However, helmets are still effective until the infant is 12 months old.
Usually by age 12 months parents can start checking with the child's physician to see if they have the neck development to safely go for a bike ride. Most toddlers' neck and shoulder muscles can tolerate the weight of a helmet and absorb shock from bumps in the road at 1 years old.nd, some jurisdictions have laws requiring children to wear helmet, include when they are riding in a trailer. Conceptually, a infant seat setup, used on smooth roads, combined with a good shock-absorption system and good head-neck-back support would be safe for an infant sooner.