Standing Core Stabilization...

Standing with your feet hip-width apart, use both hands to hold a dumbbell straight out in front of your chest, core engaged (a). Moving your torso slightly, slowly rotate your arms to the left as far as you can (b). Pause, then rotate to the right. That's one rep. Continue for a total of 10 reps.

When you want to sculpt lean, sexy abs, doing crunches is highly overrated. Why? On-your-back moves target just one part of your midsection and leave out the deep-lying muscles that cinch in your waist. An upright abdominal workout engages all the muscles you need for a bikini-worthy middle—minus the neck strain. You'll be strengthening your entire core, the dozens of muscles that make up your hips, pelvis, lower back, and abs. And this will improve your posture and ensure you perform everyday tasks, such as lugging heavy grocery bags or running to catch a bus, more efficiently! 

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