I just thought I'd throw this out there for everyone that's been dealing with exercise intolerance for so long (like me)... I just got a Nintendo Wii and the Wii Fit Plus... I'm sure you all know what these are but they are interactive video games, but not 'shoot 'em up' games... there's like tennis and baseball and bicycling, etc. and the Wii Fit teaches you strength exercises, yoga, balance, etc. It also measures your body stats and follows your progress.