But sleep researchers have been paying closer attention to what happens during that final hour—and their findings are surprisingly practical.

While these symptoms can have many possible causes, vitamin deficiencies are one possibility that's often overlooked.

That made me wonder why such a familiar activity is often overlooked while more demanding workouts get most of the attention.

Shoes can affect how we walk, how our knees and hips move, how our posture changes throughout the day, and even how tired we feel.