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You'll brace and flex your abs to build them up—while working against resistance to make them stronger, too. Give this routine a try to get shredded before summer. Why: You'll get shapelier (and ...

Or try this. It's called a plank. To stay steady, you're forced to flex your abs. For maximum benefit, each routine should only be done for a few minutes at a time. Dori Ricci It's really not ...

You'll brace and flex your abs to build them up—while working against resistance to make them stronger, too. Give this ...