If you are actively engaged in a sustained activity that works your body and increases your heart rate, then you can count it as exercise. If it's a day-to-day activity like cleaning or walking around the house, then you wouldn't.
I assume you mean you are pushing a wheelchair with your arms? If that's the case, I would say so... if I walk to the store, I certainly count it, although it's not a huge distance.
Edited by: DRAGONCHILDE at: 3/1/2012 (15:17)