With just 15 minutes of daily exercise you could become long-lived, according to a study | Video

“Having a positive attitude, people who feel useful, who enjoy their activities, who feel that their life is important, live a longer life,” says doctor and researcher María Corrada. She knows the keys to a research study that examined the types of diet, activities and medical history of more than 1,600 people over the age of 90 to determine what factors favor longevity.