Although indoor training bikes are a great way to get in shape, they don't do a great job of reproducing the feeling of actually being outdoors. The RealRyder ABF8 ($2,000) offers an alternative to the stiff, immobile ride from the typical stationary bike. You'll work out muscles usually untouched while biking as the RealRyder flexes, tilts, and turns as you ride, forcing you to rely on your core and upper body muscles to resist the instability. The ABF8 sports a black frame and shrouding, with a polished flywheel and two bottle holders (one for water, the other for the TV remote). You'll burn more calories and get in shape faster, all without leaving the living room.