I get on a Gazelle cardio machine everyday for 30 minutes.  I had Gastric By-pass surgery in July.  I have lost 165lbs so far.  I got pretty weak as I lost weight. The Gazelle has brought the strenght back.  I couldn't lift a bale of hay to save my life a few months ago.  I sure like the weight loss and recomend the procedure to anyone that is struggling to lose weight.