Question

How do I prevent post-marathon pain?

Last year I ran my first marathon and about halfway through the race I began to feel pain in the groin at the point where my thigh meets my torso. The pain did not get much worse, but it didn't go away. It continued to hurt a month or two afterwards (most noticeably while running) and sometimes seemed to travel to the hip joint on my right side. What can I do to stop this pain from returning when I train for my next marathon?