Forget 30, flirty, and thriving—you’re 40 and ready to have the fittest years of your life. Maybe, after years of caring for young children, you’ve mastered the morning school drop-off and have ...

If you're a triathlete, you probably really like swimming, biking, and running. As a cardio junky, it might be hard to pull yourself away from your sport-specific training plan to focus on strength ...