Exercise with mobility problems?

[Sophis]

Hi

I was wondering if anybody could help me with my problem baisicly I need some advice and help on the subject of exercise (especially cardio) for people with mobility problems.
I'm a 23 year old woman with no other health problems but had an accident last year which left me with problems with my left knee and now walk with a cane. Movement as simple as walking is a problem for me as the flexing of the leg and moving the knee causes extreme pain.
Well simply put I need to lose weight and want to get fitter. Are there any exercises especially cardio workouts that i could do that would not include movement of the knee?
Running, walking, and bikes are all out as they require movement of the leg and i'm at a loss at what I could do. The lack of exercise (and the resultant weight gain) is really getting me down and I really hope you guys can help me out here

Thanks in advance for any help and advice

 

[blindside]

would swimming be bad? I'm not really sure but it's good cardio and leg movement varies per stroke but can be quite little

 

[~lhw~]

Almost any form of upper body cardio may help, provided your accident hasn't affected your back as well.

 

[malkore]

i too would think swimming would work. the legs don't flex when kicking during crawlstroke and back stroke. butterfly would not work.