weight loss is primarily diet-based. you can do all the cardio in the world and you'll get results but in order to keep it up, you'll have to continue increasing cardio. do you track calories? if not, you should start. easier to make changes to your diet to accomodate your goals if you know how much is going in. to give you a rough estimate, your daily calorie intake should be around 3,315 (your bodyweight [255] x 13 calories per pound for cutting). cardio should be secondary. do you currently life weights?
Some people get lost in thought because it's such unfamiliar territory. -G. Behn