At the race command center on the sidewalk outside the school—with a few tents and trailers, a cluster of folding tables, plastic coolers, and a row of blue porta-potties—the mood is downright gleeful ...

Your IT band feels super tight and achy, and the discomfort intensifies as you run. So you take what seems like the logical next step to reduce your pain: You foam roll the heck out of it. “Everybody ...