By adopting a physically active lifestyle, and maintaining a healthy cardiovascular system divers can reduce the risk of potential complications and fully embrace the wonders of exploring the underwater world.

Preparing for cold temperatures is important when getting ready for dives.

Factors to review to prevent decompression sickness (DCS).

Everything you always wanted to know about oxygen toxicity, including what's happening as well as signs and symptoms.

A diver’s buoyancy is dynamic, constantly altered by pressure as the diver ascends and descends.

ASK DAN: What Do I Need to Know About Decongestants and Diving?

Some of the world’s best dive sites are only accessible by boat, but unfortunately, seasickness prevents some divers from visiting them.

Cuts and scrapes are among the most common injuries incurred by divers, and DAN receives calls from people who have come in contact with coral at least once a week.

Pulmonary edema is an abnormal leakage of fluid from the bloodstream into the alveoli—the microscopic air sacs in the lungs. It is most often the result of heart failure or other cardiac problems. Sometimes, however, pulmonary edema is observed in swimmers and divers when no underlying medical cause is apparent.