"Runner's knee" is a term used to describe pain or discomfort felt around the kneecap, often experienced by people who do a lot of running or other repetitive knee movements. Full definition
I seem to be experiencing typical runners knee pain at a very convenient time — in terms of blogging about it, at least. (health.com)
Patellofemoral Pain Syndrome (PFPS) also known as runners knee, chondromalacia patellae, anterior knee pain and patellofemoral joint syndrome is a generic term used to describe patella pain at the... (sportsinjuryclinic.net)
According to a study of runners, hip strengthening exercises reduce patellofemoral pain, a typical knee pain encountered by runners, as well as improved the gaits of the runners (ahealthblog.com)