I ran 5 miles today on the treadmill followed by 5 miles on the stationary bike. It was quite a relief too because two days ago, I had a bad fall and hit my kneecap so hard that even walking was difficult. Yesterday it was impossible to run due to the pain. But today, I decided that I really needed to try to run so I could see just how bad the pain was. After a few minutes, I could tell that I just have a simple bruise on my knee and running didn't seem to aggravate it at all. I certainly don't need a serious injury right now! But I suspect it is nothing more than a simple bruise.