Shots in my Knees

In July 2009, I received a series of 3 shots of Synvisc in both knees. This is the stuff from a rooster's cone. I have arthritis under the knee caps and Synvisc lubricates it and eases the pain. It works for up to 18 months and there is no down side of its use. Since it has been nearly 18 months since the shots and I have been having knee pain again, I went to the doctor today for more shots. They have a new version out now and only one shot is required, rather than three. Knowing that I would be getting the shots late this afternoon, I ran 3 miles on the roads in town earlier today.