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 ...

If you’ve been wanting to tighten up your core, you may have thought about investing in a Stealth Core Trainer or an ab roller. Both are easy at-home tools you can use every day to work your abdominal ...

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 ...