You don’t always need fancy tools to work your core. But if you are looking for a new way to push your body, you may want to give the Four Minute Core Trainer a look. It is designed to give your body a total core workout in 4 minutes. It activates 46 core muscles and 8 arm muscles. The unit has upper and lower modules to provide variable resistance of 60 lbs and 70lbs respectively.
The trainer can adjust to most users and folds down for portability and storage. A smart dock is also available to let you keep up with exercises on your mobile devices.