There are two types of athletes: the 4 a.m. warriors, and those who would rather carry dumbbells all day than work out in the morning. If you asked me three months ago, I would have chosen the latter.

(CNN) — The health benefits of a good night’s sleep have long been touted by researchers and medical professionals. While you’re catching z’s, your body is hard at work maintaining your physical and ...

Bad sleep killing your workout? Science reveals prioritizing rest after poor sleep boosts long-term fitness & performance.

We all know exercising can improve our lives, but many of us don’t do it nearly enough. Work, stress and lack of time all get in the way of getting to the gym. Only 24% of Americans meet the ...

David Spies' alarm clock goes off at 3 a.m. His routine after that is fairly simple: Spies drinks a couple of cups of coffee and does some reading at his Budd Lake home before his wife and kids wake ...

Usain Bolt smashed the 100-metre sprint record at the 2009 World Championships in Athletics in Berlin in a floodlit stadium under an inky night sky. This article is part of a series on fitness that ...