Probably the best non evasive type of exercise. Cycling is easy on the knees yet gets the heart pumping as it should. It is easily adjustable to apply the type of workout you are looking for. Amazingly aerobic. My grandfather was still riding a bike in Europe at the age of 90, so I know this type of activity is good for many people.
RAD Cycle Products Indoor Portable Magnetic Work Out Bicycle Trainer
State of the art technology: As soon as you begin to pedal, the ultra QUIET internal magnet creates resistance
Extremely Portable: The MAG Trainer is extremely light and it can be folded down like an ironing board for travel and storage
Maximum Stability, one of the most robust and sturdy stands on the market; extra wide legs and a sturdy frame makes this the trainer the pros choose
Magnet Steel Bike Bicycle Indoor Exercise Trainer Stand by FDW
Five internal resistance settings.
Quiet design, very low noise.
Easy fold for travel and storage. Heavy duty steel frame.
Stamina 1300 Magnetic Resistance Upright Bike
Upright stationary bike for effective low-impact aerobic exercises in your home
Smooth magnetic resistance with tension dial for adjusting intensity
Large, easy-to-read monitor displays speed, distance, time, and calories burned with one-button control
Sunny Health & Fitness Belt Drive Indoor Cycling Bike, Grey
Fully adjustable seat and handlebar
Heavy duty steel frame with a 49lbs flywheel
Belt drive mechanism for smooth and quiet workouts
Schwinn 130 Upright Bike
Dual track two LCD window system allows you to monitor up to 13 different display feedbacks
Schwinn Connect goal tracking and data export keep you up to date on reaching your fitness goals
22 programs, 2 user settings and goal tracking are all there to keep you motivated and challenged
Folding Recumbent Exercise Bike by Sunny Health & Fitness – SF-RB1117
Stowaway recumbent bike with folding frame for easy storage
Adjustable magnetic resistance system and nonskid foot pedals with straps
Display features Time, Speed, Distance, and Calories
Body Rider Exercise Upright Fan Bike (with UPDATED Softer Seat)
Dual-action handlebars engage an upper and lower body workout
Tension adjusts easily with the turn of a knob
Fan wheel provides a gentle breeze as you exercise