This 9-minute ab workout uses one piece of equipment to build a stronger, more functional core

Carve out just nine minutes a day, five to six times a week, and watch how your core transforms.

Forget sit-ups: I tried this seated thigh and ab workout for a week and burned like crazy and torched my core

Grab a chair and try this ...
Men's Journal

Fitness Expert's Best Home Ab Workout & 7 Intense Lower Ab Exercises Hit Your Entire Core

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Yahoo

Forget sit-ups — use this 10-minute standing abs workout to build a strong core

While classic core exercises like sit-ups and crunches are certainly an effective way to train your abs, they are not the only way. If you prefer to stay standing for your workouts, then this ...

'The WH Flex Challenge Helped Me Get Visible Abs'

"The results were bigger than I expected." ...