I think Coach Nicole has a chair video, I don't know if it's cardio or not. You could try googling sitting/chair/wheelchair workouts and see what pops up. Or, just don't worry about cardio. Focus on ST. You could do lots of different upper body and some core work sitting.
I am 5'4". Starting Weight (4.6.11) 164.6 First Goal 130 - Reached September 2011 Currently maintaining under 120 and working on changing my mental image of myself!
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