I was banded in October. Prior to the banding, I was riding my bike for about 45 mins a day on hills and flat. Now, I do 50 mins of cardio every other day on an elliptical machine (weather is not nice enough for me to bike!), then some weights on the other days. But 2 weeks after surgery I tried some strenuous cardio and found that I would be very sore the next few days. I didn't experience any weak feelings during the exercise. The bike riding (especially up hills on a bike) probably uses your stomach muscles too much at this point in your recovery...a couple more weeks and you should be stronger.

As for the 500 calories, seems way too low..I was at 1200 my first few weeks (liquid diet phase)...especially with the amount of exercise you're trying to do, I'd suggest considering more calories since you're probably burning between 500 and 1000 just from your exercising.

Good luck,

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pnwAL

Banded 10/2/08 - Portland, OR.
Dr. Halpin - Oregon Weight Lose Surgery Clinic