A line of aquatic stationary bikes, "aqua spinning" takes all the benefits of land-based bike and spinning classes triples them. Multiple resistance levels allow users of all types to exercise at comfortable settings while the added resistance of the water will make some movements more challenging than on dry land. The benefits of water exercise? Reduced stress, increased endurance, great for rehab and it helps speed recovery. As with all underwater activity, the joints are subjected to far less stress during aqua spinning than other forms of exercise. Aqua spinning means less post-training fatigue compared with exercise that takes place out of the water. Users also benefit from improved flexibility, posture and muscle relaxation. Up to eight hundred calories an hour can be burned biking in water, with the support and pressure of the water speeding up blood circulation and eliminating fat and cellulite.