Breathing during exercise?

you are probably working yourself too hard too fast, you need to be patient and start out gradually, if you start getting short of breath or sore stop and take a break. As you get more and more into the routine of exercising on a regular basis your body will get accustomed to it, you'll have more energy and you will be able to do more over time. Be patient and do not get discouraged. Eating a balanced diet also really helps.