I bought a used version of Richard Simmons Sewatin to the Oldies a couple weeks ago. At first I thought it was silly and I felt ridicolous but the more times I do it the more I realize I'm really getting a workout and it's fun!!!!! It goes by really quickly and I don't even realize I'm sweatin and my legs have turned to jelly until all of a sudden he's doing the cool down. It beats my treadmill anyday and when it's over I def. think I've gotten a better workout.