Breathing is a fairly simple act. You rarely need to think about it. You inhale in oxygen and exhale carbon dioxide effortlessly from the moment you’re born. In fact, newborns are probably the best breathers out there. Infants and young children seem to effortlessly use their main muscle of respiration, the diaphragm. When you watch kids breathe, their little tummies move outwards when they inhale and move inwards when they exhale. This is because our diaphragm, which is a dome shaped read more