I had leg-dragging, air-gasping, eye-popping agony on the 4th (&last) round of my "competition" run beginning of december. I no longer registered the pretty Xmas lights overhead. Just hanging onto BF for dear life and finish, because I did not want to "give up" the pace he was setting (easy for him).

Other n that my hips started going "rusty" at the end of my 2 longest runs so far (after an hour and more) - it felt a bit like sciatica. It went away overnight though.