Hey guys wassup. Well here's the story. Well about 3 weeks ago my friends and I set up a one day group run . Every Sunday morning, we wake up at about 6:30-7, and go to a park that has a two mile track/trail that has ups and downs curves; which make the run even harder. Well today my lower back is sore/tight as hells. I know about 80% thru the run I felt my back getting tighter, but didn't pay any attention until this morning. Anyone why my back will tighten up while running. Another question I have is why are my legs still sore. I run a stationary bike fro 35 mins and stairmaster for 10 mins 3 days a week. I would think my legs should be usd to the running 2 miles by now. The last three days after the 2 mile run my legs are sore till Tuesday afternoon!!