Forbes contributors publish independent expert analyses and insights. I write about video games, technology and pop culture. And so Howard set out to solve this problem of engagement, to turn planking ...

While each product featured is independently selected by our editors, we may include paid promotion. If you buy something through our links, we may earn commission. Read more about our Product Review ...

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 ...

The Stealth Core Trainer is an exercise device that works with your phone to distract you with mobile games you control with your body as you hold a plank, but you need to pay extra to play most of ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio products, ...

There are many reasons to work on core strength, but there's only one way to get it: hard work. The Stealth core trainer (currently on Kickstarter) wants to help you smile through your training by ...

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology. The Stealth Core Trainer is an exercise device that works ...

The Stealth Core Trainer is an exercise device that works with your phone to distract you with mobile games you control with your body as you hold a plank, but you need to pay extra to play most of ...