Want to get a full breath of air while you're running? Don't focus on breathing in. Focus on breathing out. When we breathe at rest, like you and I are doing right now, we only use about 60% of our total lung capacity. There's actually another 20% of our lung capacity that we can utilize, our expatory reserve volume. We can unlock this by breathing out forcefully using our diaphragm. Breathing like this allows us to use that extra 20% so about 80% of our total lung capacity with each breath. Be careful though, there's a reason we have this mechanism. You should only be doing this during exercise. At rest if you expel too much or you breathe out too much CO2, it can actually lead to hyperventilation, which is bad. Come here running during a hard workout, think about breathing out and breathing in.