Weight fluctuation happens daily, week to week, or month to month. Learn about causes and when to see a healthcare provider about weight changes.

Here’s what to know about body composition numbers and what these metrics mean for your health and performance.

The average American woman weighs about 170 pounds and stands about 5 feet, 4 inches tall. But it's important to remember that these averages are mathematical calculations. They don't represent what's ...

Last year, my wife started training for the New York City marathon. I couldn’t exactly be ordering in Taco Bell while she was ...