Stuck in an exercise rut? Understanding fitness adaptations will help you improve performance.

Your heart is with you for every moment of your life—but the way you care for it shouldn’t look the same at 25 as it does at 65. Cardiovascular disease is the leading cause of death in the U.S., and ...

Jodi has three kids under five and a demanding job. She keeps everything on track by being regimented in her routines. It works. She gets enough sleep, eats fairly well, and stays fit. Her days are ...