Ever since humans have existed, we've been running. In many ways, it seems we were born to run. Running increases muscle mass, cardiovascular fitness, bone density, improves insulin sensitivity and helps to reduce stress. It also has many brain benefits, including helping with learning, strengthening focus, increasing motivation and more. Put simply, running improves quality of life in many unexpected ways. But what if we're doing it wrong? It turns out that the way we've all become...