diet and exercise

Paleoanthropologist Daniel Lieberman says the concept of "getting exercise" is relatively new. His new book, Exercised, examines why we run, lift and walk for a workout when our ancestors didn't.

After 10 years, the government has updated its physical activity advice. The new message? Every little bit of movement helps you stay healthy and is better than sitting on your couch.

When she was a young physician, Dr. Martha Gulati noticed that many of her mentors were prescribing vitamin E and folic acid to patients. Preliminary...