I think we can all agree that running is a relatively low-risk sport. There are minimal hazards, no dangerous equipment, and no contact with other people or players to worry about – and yet, nearly every runner will experience a running injury at some stage in their life.
The long and short of it is this: pain indicates injury. Typically, these are examples of overuse injuries as opposed to, say, direct trauma, but they can still cause serious problems. Shin splints, tendonitis, IT band syndrome; there's a seemingly never-ending list of pains and ailments directly associated with running, and even the best trail running shoes won't necessarily keep them at bay.
