Cycling is a great workout but with your arms involved in the cycling, it's even better. The Varibike features a unique handle that allows you to cycle with your hands in many different ways, either by cycling in a synchronised fashion, alternating (like your legs cycle), or one-handed. Whichever you prefer, you can change it up anytime during the ride; there's no need to stop. The Varibike is also reportedly faster than normal bikes and a number of tweaks have been made to the original to raise its road racing credentials. They even have an indoor version. Like hiking with hiking poles, cycling with both arms and legs are very likely better than normal cycling at burning calories.