By Jessica Cassity
The moves in this plan are ultra-effective because they target all of your ab muscles at once, working your waistline from the front, sides, and even the back. This creates a balance in your abdominals, something traditional crunches can't do. Best of all, you only need to do 20 reps of each move, so you can nail the whole routine in about five minutes.
Before you start, practice engaging your abs Pilates-style, suggests our workout creator Tracey Mallett (seen here), star of the DVD Booty Barre Beginners & Beyond. Suck in your stomach as you do when trying on a swimsuit, then hold on to that feeling during each exercise. Working out in this pulled-in position will make your transverse abdominals, which wrap like a corset around your waist, stay activated. End result? A whittled waist -- and no need for hot, sweaty shapewear!