i am currently training for a marathon in april. and i keep getting this very annoying pain in my right knee, which comes and goes. on a 20k run for example half way through it suddenly hurts so much i cant run any further, then i stop, wait for maybe 20 seconnds and keep on going a bit slower. and after a while the pain is gone.
then on a 30k run theres no problem at all. atm my knee even hurts when im just walking.
i ran my first longish run of 11 miles a week ago.
after about 8 miles i had a bad pain on the left side of my upper back,or undeneath my left shoulder.
i had to stop every half a mile to stretch myself and struggled home in the end.
since then i get that particular pain after about 3 miles out of the usual 6 i run.
because i had a race today i havent run for the last 4 days to get rid of it, but again, after about 3 miles it started again. i only needed to stop once to stretch myself and it was better, but obviously there is something wrong.
does anyone know where the problem is? and what can i do about it?