Hi do aerobic exercise,reduce intake of calories,avoid junk foods,spend time in exercises which will reduce to burn your fats...add ginger,green tea to your diet,avoid carbohydrate rich foods,add proteins to diet Focus on low-impact cardio workouts since most women who have very large breasts simply cannot do high-impact exercises like jogging or running. Do low-impact cardio exercises on equipment like a stationary bike, treadmill or elliptical trainer for 45 minutes, at least 5 days a week.Also, perform specific strength-training exercises to help tighten up the chest muscles and reduce breast size. Examples of these exercises include classic pushup and dumbbell bench press. Do these exercises with high repetitions between 8 to 12 reps in 2 or 3 sets, a few times a week....if no improvements you can consult plastic surgeon for breast reduction surgery