|I like this idea. This arm powered quadcycle called the Champiot($1,000) that is designed to the exercise. Instead of pedaling, you just pull the handlebars back and forth like a rowing machine.
"The exerciser, which has been built under precise engineering specifications to achieve optimal strength, stability and safety with minimal weight, and which has a motorcycle chain and four inflatable tires, has been designed to promote and maintain physical and emotional health of persons from 4'2" to 6'6" tall, (maximum weight 300 lbs), with an aerobic, wholesome, exhilarating, OUTDOOR exercise, on sidewalks, bike pathways, parks and beaches of THE WORLD! It can be transported by automobile using the same racks that are utilized to transport bicycles."