Hi!

I live in a small appartment and want to do some excercises to keep my fitness. Does anyone know some excercises for breast muscles?

If you're talking about the pectoral muscles, then the all time best calisthenic exercise for hitting the chest are push ups. And if you want to up it a notch, try doing push-ups on a higher surface. Doing pushups on a slightly higher elevation allows you to hit more muscle fibers within the chest allowing you for a deeper contraction.

Hi leftwheel,
If I am not mistaken you are asking about chest exercises and you want to do these exercises in your apartment.
push ups, pull ups, dumbbells flys and dumbbell press will be the best exercises for your chest.
provo gym

Breast exercising is very important to keep the health and shape of the breast. It is important to meet your health care professional before starting the exercises. I am going to explain an exercise I do regularly to maintain my breast figure.
First stand facing a wall with feet hip width apart. You should keep approximately 18-20 inches from the wall. Place hand forward and lean in and then push back to upright. When you place your hands forward, remember to place hands with shoulder width apart and in line with shoulders. This exercise is called “Press Ups”. It is very easy to practice in a limited space.
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Breast Care: Dr. Robert Goulet is a well-known expert and member of ecommunity, Community Breast Care in Indianapolis.