Add Yahoo as a preferred source to see more of our stories on Google. Chest pain can be disconcerting, but it’s important to remember that not all discomfort signals a serious health condition like a ...

Study shows greater muscle area in men leads increased risk of heart disease; it's different for muscle density. Body composition -- often expressed as the amount of fat in relation to muscle -- is ...

Your heart is one of the most important organs of the body. It pumps oxygenated blood to the body, helps in nutrient delivery in the body, sends oxygen-poor blood to the lungs, receives oxygen-rich ...

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 ...

Our hearts beat around 100,000 times a day—and do so throughout our entire lives. They draw the energy for this from the ...