Here is an office chair that doubles as an exercise bike to help you get more active at work. The FlexiSpot V6 has an ergonomic design. It has an adjustable lumbar support bracket, quiet flywheel, and stepless adjustable resistance. It also has lockable casters.
The FlexiSpot V6 has a backrest with 90 to 120 degree tilt adjustment. Its armrest is adjustable in various directions. The bike has a LCD display to show your stats. You can find out more here.