Hormones are the body's chemical messengers that orchestrate everything from mood and metabolism to reproduction and sleep.

If you need one more reason to motivate yourself to be more physically active, you can add the exercise-induced hormone irisin to your list. In the past two years, scientists have discovered that a ...

Ronald M. Evans, an authority on hormones whose research on exercise and metabolism led to the discovery of compounds that act like “exercise in a pill” in lab tests, will deliver the 2010 Sinsheimer ...