Hollis Liebman believes no two workouts with a trainer should repeat themselves. He believes in variety, keeping tension on the working muscles at hand, all the while educating the client. Keenly aware of the varying needs (both physical and mental) for clients to enlist a trainer, as well as the myriad options available, foremost on his mind is progress. Hollis has written a number of books on personal training, as well as children's books. Check them out here.