Once the gymnasts can make their front hip circles to the support by themselves, two important goals are to minimize bending of the arms when coming back to the support and to begin connecting their font hips circles to a nice cast.
This used to be an old common way to begin the front hip circle. Starting with an arched position before falling down to a pike in order to speed up the skill. Although some gymnasts still use this initial approach, the pike to speed up the circle can be initiated as well from a body falling down in a hollow position which is the more accepted present approach.