Why does my midback hurt after running and what can i do to prevent this?

Warm up. stretch: I have found that sometimes the back area can tighten up after running. I believe that running at a distance at a steady pace and then resting or sitting down exacerbates lower back pain and tightness. My suggestion would be to stretch the lower back after running and keep moving after a long run and not sit down for awhile after running ie. Walk for a few minutes.

Please be carefull: Please be careful with back pain. It could be something as simple as muscle imbalance, or something worse. When you find the reason you could address the issue in a direct way. Good luck thanks.