I generally run 25-30 miles per wk. I am slowly increasing my longest run and am now up to 9 miles. Last night I ran 10 miles and apart from usual tightness in the last couple of miles I felt really good. Steady pace at 8:45 per mile.
This morning my knees are really sore. I am struggling to tackle the stairs. My knee caps are tender to touch especially round the edge. Any idea what I am suffering from and what advice could you give.