Koljeni zglob predstavlja najveći zglob u ljudsokm tijelu i kao takav je podložan mnogim ozljedama. Jedno od češćih ozljeda u sportaša i osoba koje se bave aktivnošću je skakačko koljeno ili patellarni tendinitis. Ono spada u sindrome prenaprezanja. Prepoznaje se po boli koja se najčešće nalazi na vrhu ivera, ali može se osjetiti i na tuberositasu tibije, najčešće ju inicira aktivnost istezanja mišića, kontrakcije m. quadricepsa femorisa uz otpor i kod obične kontrakcije. Nastaje radi gomilanja mikrotrauma tokom vremena, velikog intenziteta treniga na koje tetive nisu navikle te degenerativnih promjena. Na nastanak skakačkog koljena utječu i vanjski i unutarnji čimbenici kao što je vrsta podloge na kojoj sportaš trenira, obuća koju nosi, disbalans mišića, ravna stopala i mnogi drugi. Sama bol uzrokuje nemogućnost odrađivanja svakodnevnih zadataka kod osoba i nemogućnost bavljenja sportom općenito uzrokuje smanjnje funkcionalnosti. Ona se može javiti i kod izvođenja čučnjeva, pri penjanju ili doskoku. Dijagnoza se postavlja pomnim kliničkim pregledom, najčešće je to palpiranjem vrha patelle i tuberositasa tibije no, postoje i druge metode o kojima detaljnije piše u nadolazećem tekstu. Od pomoćnih metoda za dijagnosticiranje služi ultrazvuk, radiografske pretrage, magnetna rezonanca i tremografska analiza. Nakon postavljene dijagnoze kreće proces rehabilitacije s kojom je poželjno da se krene što ranije. Počinje sa potpunom ili djelomičnom poštedom osobe od treninga, sukladno s RICE metodom (Rest, Ice, Compression, Elevation). Nakon toga se kreće na povećanje snage muskulature m. quadriceps femorisa i fleksibilnosti skraćenih mišića. Najpopularnija metoda vježbanja su ekscentrične vježbe s nagibom jer simulira procese cijeljnja dodatnim opterećenjem patelarne sveze. Postoje i druge metode liječenja kao što je udarni val ili elektroterapija. Ako ni jedna od metoda liječenja ne uspije okreće se kirurškom liječenju, uglavnom ako je došlo do patoloških procesa ili rupture tetive. Danas se sve više pridaje pozornost prevenciji od nastanka ozljeda. Na način da se prvo otklone unutarnji i vanjski čimbenici, zatim počne raditi na snagi i fleksibilnosti. The knee joint is the largest joint in the human body and as such is subject to many injuries. One of the most common injuries in athletes and active people is jumper's knee or patellar tendinitis. it`s a part of overuse injuries. It is characterized by the pain that is often located on the top of the patella, but it can also be located on the tuberosity of the shin bone, it`s mostly initiated by the activity of muscle stretching, contraction of the quadriceps femoris muscle with resistance and during simple contraction. It occurs due to the accumulation of microtraumas over time, high-intensity training to which the tendons are not used, and degenerative changes. The occurrence of jumper's knee is influenced by both external and internal factors, such as the type of surface on which the athlete trains, the shoes he wears, muscle imbalance, flat feet and many others. The pain itself causes people to be unable to perform daily tasks and quit their sport activities, generally it causes reduced functionality. It can also occur when squatting, climbing or landing. The diagnosis is made by a careful clinical examination, most often by palpating the top of the patella and the tuberosity of the shin bone, but there are other methods, which are described in more detail in the upcoming text. Other diagnostic methods include ultrasound, radiographic examinations, magnetic resonance imaging and tremographic analysis. After the diagnosis, the rehabilitation process begins, which should be started as early as possible. It starts with a complete or partial sparing of the person from training, in accordance with the RICE method (Rest, Ice, Compression, Elevation). After that, focus is on increasing strength of the musculature of m. quadriceps femoris and flexibility of shortened muscles. The most popular exercise method is eccentric exercises with an incline because it simulates the healing process by putting additional stress on the patellar ligament. There are other treatment methods such as shock wave or electrotherapy. If none of the treatment methods succeeds, surgical treatment is unavoidable, mainly because pathological processes or tendon rupture have occurred. Nowadays, more and more attention is paid to the prevention of injuries. Firstly, it should start by eliminating internal and external factors, then the focus be on building strength and increasing the flexibility of muscles.