The alloplasty with unconstrined endoprothesis is an acknowledged and widely used method of treatment of severe gonarthrosis. The goal of this half year observation was to describe the changes of muscle strenght, movement range, pain and patient’s relevant WOMAC scale which depends on the kind of rehabilitation treatment (performed in Rehabilitation Ward or at home). It was important to find the answer to the question whether the result of treatment (expressed in WOMAC scale) was associated with muscle strenght, movement range and pain. In following research I also tried to investigate whether there was any association between the strenght of muscle and the stability of the joint. The following research is based on two groups counting 21 patients each (different in rehabilitation protocol) and the control group counting 23 patients. The result of the research has shown that the rehabilitation in the hospital ward increased the strenght of flexors and extensors of the knee and also increased its absolute value, compared to results of rehabilitation at home. However after six months period since alloplasty, the absolute value of muscle strenght was still lower than in the control group. After any kind of rehabilitation treatment (eather in hospital or at home) the movement range within the knee has increased but the pain and the stability of the knee joint has decreased. The WOMAC scale results based on patients’ description of improvement have increased during the time of observation. The results did not depend on increasing muscle strenght and movement range. The feeling of improvement was associated with pain relief. It turned out that the increasing muscle strenght did not improve the stability of the knee joint which was operated on. As we can see the hospital rehabilitation treatment did not influence much the patients after a total knee replacement, and a subjective feeling of improvement was mainly associated with pain relief.