How much exercise is enough?
Two large-scale studies published in JAMA Internal Medicine tackle the question of dose (how many minutes per week) and intensity, figuring out how much and how hard we need to exercise to decrease chance of premature death and disease--without wasting time or going overboard.
Current government guidelines call for 150 minutes of moderate exercise per week to maintain health and fitness. But until recently, it was unclear whether exercising more would result in better health and greater longevity—and whether exercising less meant you’d get no benefit. Now, newly published research based on ongoing health surveys from more than 661,000 adults has identified a sweet spot: 450 minutes per week, or a little more than an hour a day.