courtesy of ENO Blog http://eaglesnestoutfittersinc.com/ENO-blog/?p=315 there is a type of yoga one can practice with a hammock. I found this quite impressive not only can a hammock free you of sleep burdens in the back country but help you stay fit at home. Video is a repost of what ENO Blog posted.

http://www.youtube.com/watch?v=eNoMFN8tF4I&hd=1