Aqua Fitness

At 41, Dara Torres is one of the fastest swimmers in the world – and she’s set to become the only female swimmer from the United States to compete in four Olympic Games.

Forget splashing around in fountains of youth. If what you want is a lifetime of health, fitness and vitality, you’re better off swimming laps.

Most of us find it plenty challenging to excel at a single sport. Olympic pentathlete Mary Beth Larsen Iagorashvili does her best work while focusing on five at once.