Depends on what has caused the 'boobs'. If you are overweight and have lots of fat on your body, then you ought to follow a diet and exercise regime to get rid of this fat.
Fat like this can settle on the breast area. it can also if you have enough, puff the nipples out.
However if you have low body fat and a normal Bmi and you have puffy nipples and 'boobs' then it is most probably gland. With this no amount of exercise will get rid of it.
For exercises if you have more of a fatty based case of the boobs , cardio, running swimmiing will help. also getting a sensible gym programme will also help by toning you up.
