A number of hand-powered bicycles have been developed.  Some are not really bicycles, but adult tricycles primarily for physically impaired riders who have limited use of their legs and feet. (http://www.ushf.org/)

Two-wheeled hand-powered bicycles have also been developed.  These bikes tend to be low, recumbent bicycles with additional small side wheels that prevent physically impaired riders from falling over if they lose control.

In both of these cases foot pedaling is not an option.

A few hand and foot powered bicycles have also been built. A good one I discovered only recently is made by Ultra Bike and can be found at: http://www.ultrabike.com/

Another model is called a "rowbike", and is also a low-center of gravity bicycle that involves a rowing, as opposed to pedaling, motion. The length of such bicycles is often quite a bit greater than that of standard two-wheeled bicycles. (http://www.rowingbike.com/)

How the AIM Full-Body Bike Was Developed

With the above history in mind, AIM set about the task of creating a hand and foot-pedaled bicycle of standard size and shape. As far as we are aware no such bicycle existed prior to our efforts.

The initial task was presented to a team of Stanford University senior undergraduate mechanical engineering students taking the course, ME 113 Mechanical Engineering Design taught by Professor Fritz Prinz in the Spring quarter, 2003. The students were told that they could not change anything to the rear of the handlebar neck of a normal bicycle, i.e., all changes had to take place from the neck forward. The students were given a budget of about $1,500 and ten weeks to develop a fully functional working bicycle.