hi pearly
Know what your going through, have patience and build up your endurance, don't over do it. I started back to the gym after my surgery in November,I've lost 65 LBS since my surgery. I am up to 4 days a week at the gym, I do 20-25 mins on the treadmill or stationary bike and another 20 minutes with weights. I still can't do more than 5 minutes on the elliptical machine.My advice is to try an add 1-2 minutes a week. Another is to break up the walk I started doing 15 mins and added another 5 after resting a bit.
I guess it took a long time in getting it on so be patient and don't shoot for the moon.
Guy