A half-hour full-body exercise routine that combines Pilates moves with the stability ball.

Beginning to intermediate exercisers who are already familiar with Pilates. You will need a stability ball and a mat.

When you combine Pilates with a stability ball, of course it results in a great core workout, but this program also helps tone and strengthen the rest of your body too. Your legs have to work a lot harder (as does your core) when you're perched on a ball for moves like Leg Swings, while your whole ab section does double time trying to keep your body from rolling off the ball during Saw. Even your arms come into play for a couple of moves. Instructor Lizbeth Garcia gives focused, precise direction and she has beautiful form. This workout works best if you're already familiar with Pilates matwork and you're used to the type of precision this exercise style requires. That precision is even more important when you start working on the ball. These exercises look deceptively simple; the truth is that if they're easy to do, you're probably not doing them right. The first time you do this workout, if you're struggling to keep your core engaged while wondering how Garcia can glide through it, you're on the right track.