Editor the Julie Strietelmeier from The Gadgeteer says that "The Core Trainer makes doing planks more fun. You pay less attention to how long you can hold the plank and more to blasting planets or gliding through the air."
Read the full review here: https://the-gadgeteer.com/2020/09/22/stealth-core-trainer-review-get-a-6-pack-while-playing-video-games/