I'll try to explain my dilemma. All through high school, I've been really healthy (or so I thought - I was 174 pounds at 5'10" when I last checked during high school, though I saw somewhere on here that 180 pounds was barely considered normal for someone who was 6' tall, but anyway...) I did sports all year round and did exercises in my school's gym during practice to keep fit, and of course the sport itself was a good motivator to stay in shape. Now... I just finished my first year of college, where I didn't do any exercise because I didn't really have the time (I'm grinding down and taking the maximum amount of classes I can - plus, I had some college credit from high school so I went into college taking classes that are harder than the average freshman), and during the weekends I did what the typical college student would do, partied at night and woke up at noon the next day, did homework and socialized during the day, and partied again that night. When I came back home just about six weeks ago, I had a doctor's visit for my physical check-up, and found that I went from 174 pounds to 208 pounds in just over a year. I'm pretty sure all the drinking didn't help, but I'm more than pretty sure that my lack of exercise played a huge role in this weight gain. Aside from officially being classed in the obese category, I'm otherwise healthy - good blood pressure, balance, and no illnesses... But I want to lose the weight. HOWEVER, I don't want to pay for a gym membership (I always relied on sports to keep my healthy so I didn't need to pay extra for a gym), so I'm looking for some good cardio exercises to do AT HOME. Remember - I'm just looking to lose weight, for now (I probably lost some muscle as well, but that's not my main issue at the moment). I presume that jogging and biking will be some popular responses, but anyway... Any suggestions/plans/routines? Any necessary warm-ups and cool-downs? Thanks for your time. Oh, also: Diet. I eat VERY healthy at home (my mom makes everything from scratch, everything's whole wheat, flax, fiber, few carbs, etc.), so I don't think it's necessary to suggest a change in diet. I now know to choose much wiser decisions for my food when I go back to college this coming fall.