The Air Bike (also known as the Fan Bike) is an excellent way to build whole-body fitness. An air bike, the resistance is relative to how much work you do. Inevitably, I think the more you pedal and work the handlebars, the greater wind resistance you'll experience. Which is why it is so popular with CrossFit fans and the UAE's professional gyms. Okay, so it is the best for training metabolic fitness and explosive power because it demands arms and legs to be trained simultaneously.