Meet the CoreXT46: a handheld kinetic core trainer that activates 46 core muscles and 8 arm muscles to give you a fun workout anywhere. You can use this core trainer from a seated, standing, or supine position. The CoreXT46 has an upper cartridge with 60lbs of max resistance and a lower one with up to 70lbs resistance.
The unit folds down for easy storage. It has a dock to let you keep up with exercises on your smartphone. Like what you see? This portable core trainer is available for under $300 at this time.