There's a 7-mile race I'd like to enter in exactly 100 days. I plan to walk, not run, the entire distance. I'm overweight and out of shape, but I just don't have the discipline to stick with an exercise program unless I have a concrete goal like this. So I've been doing aerobics (Firm tapes and Gazelle) and eating right for about two weeks now, but I still run out of steam after about 25 minutes. Does anyone have any advice on increasing my stamina?
By the way, I'm about 70 pounds overweight. Naturally, I hope that working toward my goal will cause me to drop some weight, but watching the scale makes me nuts, so I'm trying to concentrate on fitness instead of weight.