thank you for your reply, sorry i'm so late in getting back to you i am in the middle of setting up my own sports injury clinic.

the pain he is getting is only a deep aching pain in which there is no palpable tightness or painful sites, suggesting that it is not related to a vein or artery. once aggravated (which is unclear what aggravates) the intensity of pain is the same whether running or walking or even sometimes stood. the runner was not suffering at the time i saw him other than an aching pain on the end range of knee flexion (described as a pulling sensation), the runner says it occurred after an 8 mile race two months ago and he hasn't been able to train or race aswell as before the occurrence.

i am going to examine his back and hips but this seems a real puzzler. i have advised him to book in with his doctors to get some diagnostic tests done i.e. ultrasound. straight leg raise and slump are clear

could this be degenerative Wikipedia reference-linkmeniscus pain, i read you can get pain at the end range of knee flexion with this condition?