Yes fellow, getting-older-persons; our metabolism slows down and losing weight is harder and takes longer. When you refer to "your body changing" from exercise, I notice that too. My stomach has flattened some, but I haven't lost a lot of weight - maybe 7-8 lbs. Keep up the good work SB. Knee aches are a problem for me too. After 6 miles my breathing was fine, but the legs were crying. Mig and TIS, get out there and strut your stuff. Every little bit helps.