Had a couple of rest days and went for my HM long run yesterday (a few weeks ago changed footwear from NB Zante V3's to V4's), at 8.5 miles felt a pain in my left knee, not experienced it before, made me hobble a bit but seeing as i was miles away on a country lane, i just reduced the pace and gradually the pain went.
Carried on at the slower pace for the rest of the HM distance, but then when i stopped, the knee locked and pain was eye watering. Was a mile from home and it took me an age to hobble home, finally freeing up for the last 300 meters allowing me to walk slowly but normally.
Back home it was immediate ice pack on the knee for the 20mins, went to get up and it had locked with pain again. Managed to get upstairs 1 step at a time, shower, applied voltoral, and took ibuprofen. 5 mins later it's like there's no problem with the knee, it's just normal again.
It was never tender to touch or swollen.
It's weird in that it completely locked, i had eye-watering pain, yet it wasn't tender to touch, and now it's like there's never been a problem.
Any explanation most appreciated.