When it comes to doing exercises to strengthen your core, planking is a popular choice. The problem is, it's kind of...dull. To entertain yourself while you're holding plank position, you can crank up ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. The Stealth Core Trainer is ...

Which ab workout product is best: the Stealth Core Trainer or the Ab roller? The midsection of the body often gets the most attention for weight loss goals. This fixation on the midsection has ...