I have always been kinda interested in trying out a recumbent. I saw some pictures of a 3 wheeler (2 up front) called the "Cheetah" I beleive in a DK book on bicycles.
Anyway, I was talking to my father about the recumbent concept and he made an interesting observation.
Truckers with the constant clutching etc. (decades ago probably) would suffer because the body was meant to push and support weight in a more upright position, the joints are suited to standard locomotion, like walking/running etc.
Are there some issues with riding a recumbent and the required body position when pedaling/pushing?