So I want to start working on getting in shape. I do spend a lot of time in front of a computer, though I try to take breaks every half hour or so. I also walk 3-4 miles almost every day in addition to the walking I normally do just to get around normally. I do want to do more though. My doctor reccomends that while I'm doing a good job with walking and eating healthy, and my weight is about average (despite being a little chunky around the waist), I should be doing more exercise. What's a good way to start off? What's a good schedule to follow? I realize it all depends on the person, but what are your reccomendations for a healthy 22 year old? I don't want to push myself too much because I obviously don't want to hurt myself, but I also don't want to do so little that I don't get any benefits.