An irregular heartbeat, or arrhythmia, leads to inefficient pumping of blood by the heart, which then prevents blood and ...

Based in Tampa, Florida, Virginia Pelley is a former women's magazine editor who has written health and fitness content for Men's Journal, Cosmopolitan magazine, the Chicago Tribune, ...

Oxygen saturation at 6 minutes improved with oxygen use, but perceived exertion scores (Borg dyspnea index) did not change. Supplemental oxygen therapy may reduce cardiac effort during exercise in ...