From the company:

Johnny G is once again shattering convention, breaking the rules and challenging us to rethink everything we thought we knew about cardio training. The fitness visionary who created the Spinning® phenomenon, has now invented a new program with his latest innovation, the Johnny G Krankcycle by Matrix. The Kranking Training System is the first exercise program to focus on the upper body as a way to build cardio fitness. Kranking provides a new way to build aerobic capacity and upper body strength while burning calories and building core stability. Since it utilizes the upper body instead of the legs, it represents a unique cross-training opportunity for athletes of all types. Johnny partnered with Matrix Fitness to develop the Krankcycle, and it’s unlike anything you’ve seen before. Kranking is fun, intuitive, and easy to learn. It can be used alone on the cardio floor, with a Personal Trainer, and can be performed in a group setting. It represents an unprecedented opportunity for physically challenged individuals and welcomes a wide range of “special populations” with open arms. Kranking opens the door to a world of possibility for those who train and for the individuals and organizations who train them.