you can probably return to that altitude without problems as long as you are properly acclimatized. The concentration of oxygen at sea level is about 21% and the barometric pressure averages 760 mmHg.

The combination of alcohol plus cabin pressure at cruising altitude may threaten sleeping plane passengers' heart health, ...

Some people experience high-altitude headaches due to changes in barometric pressure, such as during plane travel. Others, who experience migraine headaches or tension-type headaches, find that ...

Understanding atmospheric pressure is vital, newsroom meteorologist Justin Ballard said, because those giant H’s and L’s representing high and low air pressure systems on a weather map are ...