Urbanisation comes at a cost. With the development of infrastructure, we have lost many dirt roads and trails. We humans have been running since the beginning of our evolution, but the surfaces on which we run have drastically changed in a short span of time. Dirt trails, natural gravel and grass have been replaced with concrete and tarmac. It is needless to say that we still have access to dedicated mud and (synthetic) tracks. You might also find a hilly trail near your house. What is undeniable is the fact that it’s not as easy as it was. We will talk about treadmill running in another article. Let’s focus on grass, synthetic track and concrete for now. Another noteworthy point is that the injury risk depends on various other factors like the running technique, type and intensity of running, the distance covered per week, the stride length and frequency, type and material of shoes, landing patterns, amongst others. So for now, we will be strictly looking at the surfaces to see which ...