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 ...

So when I had the opportunity to review the Women's Health Flex Challenge ... single day on the Abs Enthusiast track, and I quickly realized it delivers a serious bang for your buck: short and ...