hi, 2 years ago i had an acl reconstruction on my left knee. the surgery was successful and i have recovered well. recently i went for a routine check up, though i dint have any problem per se, the doctor advised an x ray. on examination, he said that i have medial compartment narrowing on both the knees and it could lead to arthritis further down the line. i am 26 years old, though overweight, i have always been an active sportsman. but the amount of sports has decreased after the surgery. does this diagnosis suggest a poor prognosis for the future, or is this medial compartment narrowing a normal tendency in active sportsmen? i was advised to take kondroflex as well.