Taking a good client history is key to a good intervention. And in each case it was a simple fix that resolved their issue. In fact, you'll probably roll your eyes as you read the solution.
I was recently asked for some clarification regarding my nose breathing post. In it, I detail all of the benefits of breathing solely through the nose. (There are a lot) The question I received was essentially: should one breathe that way all the time if one is running “easy pace”? In other words, if you're running easily, are you better off breathing solely through the nose?
What inevitably happens is that you go out for a run and you feel great. You're attuned to your exertion level and maybe you're even aware of your personal heart rate training zones. You're doing everything by the book. Yet, you continue to break down with an injury every 8-12 weeks! What's up??