Harley Pasternak's 6 Star-Tested Tips for Looking Your Best at Any Age

The celeb trainer and PEOPLE.com blogger reveals how Sandra Bullock, Halle Berry and more stay forever gorgeous

5. Listen to Your Body

Who gets it right: Jane Seymour, 61
While many of us were taught to "play through the pain," it's not great advice. If you feel joint or muscle pain that lasts more than a few days or if one side of your body hurts more than the other, it's time to rest and/or see a doctor. Jane Seymour has said in interviews that her approach to fitness is cautious.