It's time to push your abs to exhaustion—not to mention, fight the flab—with new abs exercises that are anything but routine. And it's not just a six-pack you'll get: Maintain strong abs and you’ll help prevent back pain, boost your agility, and increase your flexibility, says Tom Holland, exercise physiologist and author of Beat The Gym: Personal Trainer Secrets Without the Personal Trainer Price Tag.

But no matter how tough these exercises get, always remember the golden rule of abs workouts: quality over quantity. If you're still cranking out 2,000 fast-paced crunches a day, you're wasting your time (and maybe even hurting your back). Instead of ripping through the motions, slow down and focus on getting the most out of each rep, Holland says.

With a slow, concentrated effort you'll be building up to 30-second sets of quality moves—and admiring those washboard abs you've always wanted—in no time.