CGN,
You've gotten some great advice here,I would if I were you, go get a physical,I started going to a local gym back in June of this year, I had been using some equiptment that my wife had, and was collecting dust, up until I joined the gym, A little backround here, I was in a auto accident in Dec 00, (I lost control of my pickup on black ice, and hit a semi,head-on,)I sustained some serious injuries,(I was recovering for 6 months) in March, my DR, suggested that I start excerising, I did, and later started going to a gym, It was the best thing I've ever done, I've lost about 40 lbs,(I used to weigh 240, now down to 197) feel much better, and despite my lack of a few body parts (ribs, spleen) I feel great,This also helped me upon my return to work, (I'm a pipefitter) picking objects up that had given me trouble before were not nearly as hard,and I didn't feel wore out at the end of the day as I had before, I'd recommend a gym 3 times a week to any one,it'll really help, it really helped me,Go for it!!!