THE STATIONARY BIKE GETS A BAD ATTITUDE. The name known for some of the most demanding workouts in the gym now has a new workout your members will love to hate. Tested to withstand 1400 lbs of force, the StairMaster HIIT Bike offers a robust design and features dual action wind resistance that provides a total body cardio workout. The HIIT Bike is designed to push you past your breaking point and keep working long after you can’t.