It is true that the Revbox Erg is nothing like other ergo trainers. It looks like a small wheel that is far behind the rear fork. And it doesn’t work like other coaches in its segment either. The Revbox Erg doesn’t use electricity, but it works with an ingenious air-resistance system. This allows you to teach your body the anatomically perfect pedal stroke, according to Revbox. Physical and neurological training. A revolution for many is just a round of stairs. But Revbox engineers examined which muscle groups do the most work in each exercise. Based on that, you can use Revbox to target very different muscle groups that you use little to not train on purpose. This way, you exercise different muscles in the legs and part