You'll have it really tough, because when losing weight, the muscle is first to go. You can either do this two ways, lose the muscle with the wait, or lift a LOT of weights while training. Cardio exersize is the best way to lose fat, so I suggest you do something like tae bow, or Tae kwon doe, or go to a gym (for the stairmaster! That thing is better than running!). So have happy times.