Carpet fitter's knee is an overuse condition in people who fit carpets for a living, where several knee problems can occur from spending so much time on their knees and using a 'knee kicker' to stretch the carpet.
Bilateral patellar tendon disruption--a professional predisposition? Sochart DH and Shravat BP. J Accid Emerg Med. 1994 Dec; 11(4): 255–256.
Relationship between years in the trade and the development of radiographic knee osteoarthritis and MRI-detected meniscal tears and bursitis in floor layers. A cross-sectional study of a historical cohort. Jensen LK, Rytter S, Marott JL and Bonde JP. BMJ Open. 2012; 2(3): e001109.
Morbidity from repetitive knee trauma in carpet and floor layers. Thun M, Tanaka S, Smith AB, Halperin WE, Lee ST, Luggen ME and Hess EV. Br J Ind Med. 1987 Sep; 44(9): 611–620.