摘要：40% of all injuries in soccer are knee injuries that take place in training or competition. It is expected that the number of injuries will reduce considering the constant build-up of knowledge, but it is not so. Statistical indicators say that it is in a mile raise. The reason for that fact lays in many factors such as: raise of number and intensity of training and a denser competition schedule. Rupture of ACL is 40% of all knee injuries, 56% to 70% ACLinjuries are self inflicted. Knee functioning depends on a proper muscle strength ratio between quadriceps and hamstrings muscles. Hamstrings strength output should be around 60% of quadriceps strength, depending on a speed of movement. This study analyzed the process of recovery after anterior cruciate ligament reconstruction with Kenneth – Jones method of 10 soccer players (tendons of semitendinosus and gracilis muscles were used for graft selection). The goal of this case study is to validate a 6 week rehabilitation process, and the changes it made on hamstrings muscle with Biodex System 3 isokinetic machine. Also, the goal was to confirm the benefits of an aggressive rehabilitation process after ACL reconstruction.
关键词：knee; injury; ACL; rehabilitation;; isokinetic; Kenneth - Jones
