Breathing properly helps you in many ways. It allows you to exercise more without getting tired easily; it helps release tension, helps body posture, helps detoxification and helps digestion amongst other things. That is why you should breathe proper deep breaths to help with your bodily functions. Take a look at these tips to improve your lung capacity so you can take deeper breaths.
The Center for Integrative Medicine at University of Colorado Hospital Fall 2013 Diligent Practice Newsletter. Mindful living: deep breathing exercises. http://origin.library.constantcontact.com/download/get/file/1103464048773-1125/TCFIM_Deep_Breathing_Fall_2.pdf