Running for as little as five minutes a day could significantly lower a person’s risk of dying prematurely, according to a large-scale new study of exercise and mortality. The findings suggest that the benefits of even small amounts of vigorous exercise may be much greater than experts had assumed.
In recent years, moderate exercise, such as brisk walking, has been the focus of a great deal of exercise science and most exercise recommendations. The government’s formal 2008 exercise guidelines, for instance, suggest that people should engage in about 30 minutes of moderate exercise on most days of the week. Almost as an afterthought, the recommendations point out that half as much, or about 15 minutes a day of vigorous exercise, should be equally beneficial.