OK. Here is a pleasant topic.
Two weeks ago I took a hard fall on my mountain bike and landed hard on my lower back in the kidney area. It was swollen and painful for about a week and I took it easy with training. I had no pain peeing or anything like that and everything was fine.
Last Friday the soreness was gone and I went for an hour run. When I came back and I found that my urine was pretty red from blood. I had done biking, swimming and eliptical earlier in the week. I don't know if was related to the kidney bruise because I was not very well hydrated and I drank nothing during the run, but I have never had that issue before from running.
My urine cleared up in about an hour and there was never any pain. Two days later I tried running for just 15 minutes and noticed some blood. I have taken the last week off. I have not yet seen a doctor although I know I should. I have since had no issues and no pain. There has been nothing about my health that is out of the ordinary. I have done long stints on the bike, swimming, and on the eliptical without issue. It only occured the two times I tried to run.
I have an appointment to see the doctor, but should I worry? I'm afraid to try running again. I was preparing for a marathon in November, but that seems out right now as I've only run 1.15 hours now in the last two weeks.