I have had the same thing happened - massage therapist suggested it might be overuse and stress on the good leg. During massage she works both legs. In PT they only work the injured leg too. I asked PT about working both legs and was told they couldn't discuss it because insurance only pays for the bad leg.... But it seems every few days things are changing - ached and pains where they were not before but then some have gone away. IT seems more relaxed after massage. I still am getting the best results from massage.