Re: lost weight without exercise
First of all, CONGRATS! For being 16, you had alot of motivation in you to lose 45 pounds. Now, because you didn't exercise, and the amount of weight you lost, you have sagging skin. I would suggest weight training, or some sort of cardio to tighten your skin. since you are so young, your skin still has that elasticity and will most likely go back to normal as you exercise. On the other hand, if you were quite overweight, your skin may not totally go back, even if you exercise. In that case, you would have to have surgery. Now, your only 16, so I definitely do not reccommend anything like that, because your body is still growing and it may fix itself. But, if in 5 years your still not happy, than maybe surgery is the way to go.
Either way, you should still exercise to keep that weight off. Great Job.