We prepare for riding from the ground, by first helping the horse understand the human is only a little weird, but still fun to play with. Be aware that you are violating that good leading behavior you worked so hard to get in basic training. The key is making the hand on the back the signal that a different behavior will be rewarded.
For more information about how to train this behavior, check the blog on the Magic Mustang Tamer. As always, we appreciate your effort to help us help horses by liking and sharing our content.