Need another way to absolutely destroy your core?

Grab a 45-pound plate, but don't plan to lift it up. Several of the most challenging core moves you can do involve that 45-pound plate (like this one).

Plate Plank:
Set a 45-pound plate on its edge and hold a plank. Do 3 sets, and aim to hold each for 15 to 20 seconds.

Your arms are extended farther from your body in this exercise, making the plank more challenging. On top of that, the plate could easily tip forward or backward, so it's necessary for your core -- and your entire body -- to stay tight and controlled.

The plate plank is the starting point for plate ab moves, and is the easiest of these three moves that will challenge your core stability in new ways. These are all advanced moves, so you'll want to have a good handle on standard planks. These aren't moves you need to use all the time, either, but toss them in at the end of a workout to mix things up and add a little extreme challenge to your training.

Plate Triceps Extension:
Once you can consistently hold a plate plank, try plate triceps extension. Slowly bend at your elbows so your elbows drop toward the ground, then straighten your arms again.

Do 3 sets of 3 to 5 reps.

Plate Driver Plank:
Set up in a plate plank position. Then slowly rotate the plate to the right, then back to the center, then to the left, and then back to the center.

Do this for 15 to 20 seconds, and aim for 3 sets.

(And for more workouts that will get you a chiseled six-pack, check out Anarchy Abs from Men's Health.)

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-- The One Tool That Transformed This Victoria's Secret Model's Workout Routine

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