But it is the same. Doesn't matter whether the leaders are 5 minutes faster than your PR, or 50. If you can't keep the pace, you shouldn't go out with it. You go out at your pace, or maybe one that's a little optimistic, and hope for the best. You don't automatically get to blow your PR out of the water because you had the gumption to go out with the leaders. And don't forget, even being "conservative," I believe the US women were out at PR pace (aside from maybe D'Amato).