Okay, so I am thinking about getting my big ass in shape, at least better than I am. I've read mixed things on jogging vs. walking. Some say walking is better. I realize that 15 minutes of jogging will be much better than 15 minutes of walking. If you would do it in terms of distance, instead of time, would they work out to be about the same? I threw on my walkman, and a pocket full of CD's, and went on a 2 hour walk tonight. My legs ache, so I know it did something, just wondering how much.