I juts had a synvisc one injection 2 days ago. i went for a walk today and started to experience pain at 15 minutes into my walk. Pain was worse than before I had the injection. My doc indicates that my pain is not severe enough to have the knee replaced. Maybe it hasn't been long enough for the injection to work yet, however, I wouldn't expect the pain to be worse. Anybody had similar results. FYI I am 67 years old.