10 All-Natural Ways to Stay Young

4. Feel the love

Anyone who's ever fallen head over heels or discovered an activity that makes them eager to jump out of bed in the morning knows that passion is a powerful drug. "It's the central motivation of all human activity," says Gail Sheehy in her new book, Sex and the Seasoned Woman. The ability to embrace life boosts self-esteem, fuels the immune system, and improves cardiovascular health. Passion in bed can be particularly beneficial: "Loving touches release hormones, including oxytocin, that reduce stress and anxiety," says Mehmet Oz, MD, professor of surgery and vice chairman of cardiovascular services at New York-Presbyterian/Columbia University, as well as the coauthor of You on a Diet. "If sex is a purely hedonistic process, it won't have the same results."

Try it! Banish boredom and isolation at all costs. Rekindle the flames with your partner. Or discover a new love in the form of a mental or physical pursuit: Take up painting, join a book club, start a running program (you'll find motivation and tips and connect with other women like you through Team FITNESS, our personalized online exercise community, at fitnessmagazine.com/teamfitness). Do whatever it is that makes you feel energized and alive.