by Kerry SHERIDAN Agence France-Presse MIAMI, United States (AFP) — People who exercise mainly on the weekends may reap significant health and survival benefits, on par with people who work out more regularly, researchers said Monday. Currently, experts recommend 150 minutes of moderate physical activity per week, or 75 minutes of vigorous exercise. But no consensus has been reached on just how often a person needs to exercise, and whether activities should be done daily or […]