Blows to the lower end of the spinal column send shock waves the length of the column. Lower back pain in adulthood may have its origins in childhood. The greatest need is for the undivided attention of the parents. Few children receive sufficient time and attention from their parents. Punishing a child for responding in a natural way to having important needs neglected is really unfair.
Violence teaches a child nothing about how to handle similar situations in the future.
Loving support is the only way to learn true moral behavior based on strong inner values rather than fear.