Dr. Oz's Dieting Secrets
Watch beginner, intermediate and advanced workouts.
Everyone should strive to work up a sweat for about an hour a week, he says. "The number one predictor of how long you're going to live is how well you can exercise your heart," he says.
To avoid injury, stretch before any sort of workout. Dr. Oz likes to do yoga, but he says you can get the same benefits from stretches you learned in high school gym class.