55yr old female runner with bone on bone arthritis in right knee.I have had several rounds of Synvisc, the most recent 1.5 years ago. I am currently getting a series of three injections of Euflexxa. The problem: Doctor just changed my appointment for third shot so that instead of being 62 hours (2.5 days) before the race, it is now 30 hours. I have done this run for the past 9 years. This it the 10th, and I would like to do it, but don't want to mess up my knee for one race. What is likely to happen if I do this run 30 hours out from the last injection? Also, unfortunately, the race is in NYC, and will involve a fair bit of walking around both before and after.