The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

When developing longevity is your priority over one-rep maxes and timed-run events, consider the three most important “organs” on which to focus your training: heart, lungs and legs. The combination ...

As colder months set in, respiratory infections begin to climb: everything from the common cold and flu to COVID-19. It's a ...

Smoking decreases blood oxygen and makes the heart and lungs work harder, leading to fatigue. Nicotine in tobacco can also cause an adrenaline rush, leaving someone feeling tired when it wears off.

After decades of hype and setbacks, scientists have made impressive progress into tricking stem cells into repairing organs. Stem cells (like the ones above, growing in petri dishes) are able to ...

Can fidgeting and belly laughing keep your heart ticking? Heart disease has been the leading cause of death in the US since the American Heart Association was founded in 1924, and the AHA warns that ...

Doctors have been listening to the sounds our bodies make for years. Before the invention of stethoscopes, they simply put their ears to their patients' chests or abdomens. The technical term for this ...