I like playing volleyball. I use the side of my house and one of my kids' dodge-balls (real volleyballs are better, but I improvise) If you hit the ball volleyball style against a wall you hit a lot of different areas of the body; butt, thighs, calves and arms. If you keep your tummy tight (keep your ribs pulled in and your belly-button pulled toward your spine) then you also get a good ab workout, plus it's great cardio. It's fun and it's a great workout.