Comments by "Leo" (@Leoo117) on "Shallow water blackout poses a silent and undetected risk for swimmers" video.

@Elizabeth Jetter So it's super dangerous to do activities that tire your body out while holding your breath, because the heart needs to pick up the pace in order to keep up with the movement of the body, so if it can't get the oxygen it needs to go faster and pump everything around that the body needs, and is forced to slow down instead, that's when the body basically has to shut down. And that is the black out. Is that right? Kind of like an engine trying to rev up without the extra gas being pumped into it to fuel that increase in power.
2