The knee is the largest and most complex joint in our body. The aim of this is to present an describe heavy knee injury, which is known as Omnius triassic, that most occurs in athletes. It mostly happens at skiing or football. It is an injury of three components in the knee, anterior cruciate ligament, the medial meniscus and the medial collateral ligament. Injury occurs more often in women than in men. It is very important to determinate adequate treatment. In such complex injuries, surgical treatment is needed soon after injury happens. Reconstruction of the anterior cruciate ligament , the so-called an anteromedial approach, suturing the medial meniscus with the „INSIDE- OUT“ technique and joining the medial collateral ligament. Rehabilitation is very important and it starts first day after operation, in order to return to normal lifestyle and workout soon as possible. Important is postooperative plan and program that aims to gradually increase the range of motion, and restore muscule strength as it before the injury. The plan and program should be individual adjusted to each patient based on physiotherapy assesment, using subjective examination, objective examination an analysis. Whith such injuries, static exercises of thigh are significiant, which are preformed from first day of rehabilitation , in order to atrophy muscle as little as possible. Then dinamic exercises which can be concentric and eccentric. Proprioseption exercises to achieve a sense of the position of own body in space and one part of body in relation to another, exercise of knee balans develop joint stabilizers, which are musculature.