Board Thread:Off Topic/@comment-26397825-20170410034737/@comment-25936766-20170421012705

The average normal volume % of RB blood cells is 55%, I think. When it's above that, it's Polycythemia.

So, let's say one uses almost 25% of Aura, to push that volume percent to 100%, which I'm pretty sure would end up badly. It lasts for 5 minutes and decays gradually.

.....All, just to get a certain stamina boost thanks to being able to carry more oxygen. A stamina boost partially nulled by the fact you used your Semblance. Not to mention potential nasty symptoms.