The healthiest way to improve your sleep: exercise

CNN reports:

If you're one of the third of all Americans who suffer from insomnia -- roughly 108 million of us -- put away your sleeping pills. Science has a much safer solution.

"There has been more and more research in the last decade showing exercise can reduce insomnia," Rush University clinical psychologist Kelly Glazer Baron said. "In one study we did, for example, older women suffering from insomnia said their sleep improved from poor to good when they exercised. They had more energy and were less depressed."

One helpful article.