Finishing a run should leave you energized, not reaching for painkillers. Yet many runners know the frustration of a throbbing headache after running. It can strike after an easy jog, a treadmill workout, or a hot-weather long run. The pain ranges from a dull pressure to a pounding ache that ruins your post-run high. The good news? Most running headaches have simple explanations like dehydration, heat, tension, or skipping recovery steps. I’ve seen athletes I coach eliminate them with a few...