I'm always a bit wary when talking about endurance running, particularly in the context of the Bramble and Lieberman study. Whilst they do make some valid points about the importance of endurance running amongst some modern tribes; they then go on to claim that a large part of modern anatomy evolved to enable endurance running. That second part is almost certainly wrong. Many adaptations appear to benefit long distance carrying and walking more than long distance running; and persistence hunting as a strategy is more energy intensive than persistence walking (which is why few modern groups practice it, but many more engage in persistence walking). That's not to say persistence running isn't important to those groups which now do it, nor that it had no influence on our evolution; it's just the endurance running hypothesis overstates this importance and I fear lending credibility to it.