From childhood contests to grown-up moments of poolside bravado, most of us have tested our limits to see how long we can go without breathing. The aftermath includes experiencing a little ...

monoxide level in the blood will return to normal, oxygen level in the blood will return to normal, chance of a heart attack will ...

Share on Pinterest Lower oxygen levels may be beneficial to the lungs and overall health. Yaroslav Danylchenko/Stocksy Researchers are reporting that an environment with lower oxygen levels helped ...

WRAL Fayetteville reporter Gilbert Baez posted an update from his hospital bed on Monday, saying that while he is feeling okay, his oxygen levels are down. Baez said in a Facebook Live his oxygen ...