What happens when you hold your breath goes far beyond that quick dizzy spell. From plummeting oxygen levels to unexpected ...

Holding your breath for too long underwater, especially while alone, can lead to fainting or blacking out while you are still underwater. This can happen even if you are in shallow water.

Breath-holding spells can sometimes look like small seizures, said Dr. Lynette Grandison, a board-certified pediatrician with Sutter Gould Medical Foundation based in Modesto, California.

How breath-holding reveals cardiovascular fitness secrets. Your ability to hold your breath reflects your heart’s efficiency at pumping oxygenated blood throughout your body.

Breath-Holding In The Pool Can Spark Sudden Blackouts And Death : Shots - Health News When you hold your breath underwater, you might pass out before you realize you need oxygen right now.

"Breath-holding spells are pretty common in the toddler set," said Ari Brown, an Austin, Texas, pediatrician and author of the book, "Toddler 411." ...

E xtreme breath-holding like that practiced by free divers may have usefulness in the clinic. A new study shows that breast cancer patients can be trained to hold their breath for five minutes ...