12 You get sleepy.
No need to pop a ZzzQuil before your next red-eye flight. The cabin pressure in an airplane is kept at what you’d find at 8,000 feet in elevation. And because most of us aren’t acclimated to this, the saturation of oxygen into our red blood cells decreases, which means that our bodies can’t function at their normal speeds. Basically, it’s harder to stay awake in the air than it is to pass out. And if for some reason you can’t enter dreamland, try these 10 Best Tricks for Sleeping on an Airplane.
