There are many different types of Mini Exercise Bike which are useful for low impact exercise, making it ideal for people to maintain or regain physical fitness without putting stress on joints. They are portable and suitable to use whilst sitting in a chair so you can work, read or watch TV while you exercise.
Ultrasport Mini Bike Exercise Bike, movement trainer, arm and leg trainer, pedal trainer for young and old with training computer, adjustable resistance, exercise equipment for home and office
See link below to buy mini exercise bike to perform whilst in your chair