Popsugar Health & Fitness Fitness Shopping Stealth Core Trainer Review This Board Turns Holding Planks into a Fun at-Home Video Game — and I Tested It Out 31 August 2020 by Samantha Brodsky View On One Page Photo 1 of 3 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 How to Do Modified Plank on the Stealth Core Trainer Previous Next Start Slideshow Fitness ShoppingHome WorkoutsCore ExercisesPlankWorkoutsFitness Gear