Swinging the child is a good source of vestibular stimulation.
And besides, if one could maintain the practice until his baby was 18 years old, he himself would develop a physique like Arnie Schwartzeneiger.
On the other hand, I did try it with my first child, and my wife says now I look more like the Hunchback of Notre Dame. So better stop before five.
Taking time to rock the infant, and swing the toddler as they do in the pre school classes, is good practice for vestibular stimulation.
Some families even have small swings installed in the house, in a door frame, from which a child can frequently be swung (right picture in the graphic version). Later the same swing can be hung outside from the nearest tree (left picture in the graphic version).