Wear a proper fitting sports bra during exercise. Breast tissue can be damaged and sag over time when not supported properly during exercise. Have a bra fitting expert help you find your correct bra size, and buy the most supportive exercise bra that you can afford, no matter whether your cup size is an AA or DD.
Bench press your breasts higher. No other exercises can lift the breasts better than the free weight incline, decline and flat bench press. Using dumbbells or the bar, lie on your back. If you are on the decline, make sure to use the leg rests so you don't slide. Unrack the weight bar, or have your spotter hand you the dumbbells, and lower the weight to within an inch of your chest. The bar or dumbbells should be in line with your nipple line. Press it back up until your arms are almost locked. This is one repetition.
Pectoral flyes are a great way to lift the breasts as well. Lie on your back on a flat bench. Have your spotter hand you dumbbells. Hold the dumbbells together above your chest, perpendicular to your nipple line, palms facing inwards. Your elbows should be slightly bent, like you are hugging a large barrel. Next, lower and widen both arms out to your sides, keeping your elbows bent. Return your arms to the starting position, squeezing your chest muscles together.
If you have never lifted weights before, start slow with one to two sets and eight to 12 repetitions to give your muscles and joints time to adapt to the new stresses before you increase your intensity. Most women can start out with eight- or 10-lb. dumbbells on bench press, and many have no problem using the bar. Most women should start out with at least 5-lb. dumbbells on pectoral flyes, and many can start out with 8-lb. dumbbells. Once you have been lifting for four to six weeks, you will want to increase the weight or the number of repetitions, or you will hit a plateau.
To improve your results, supplement your breast lift workout with strength training in your arms and lower body and cardiovascular interval training.