The aim of this study is to clarify the effectiveness and the usefulness of the anti-gravity treadmill in postoperative rehabilitation after knee arthroplasty. This issue is especially relevant because the number of knee arthroplasty patients is increasing. The rehabilitation of knee arthroplasty patients has also appeared to be more challenging than in the case of hip arthroplasty.~The investigators will compare anti-gravity treadmill rehabilitation and the traditional postoperative rehabilitation with instructions. The investigators will recruit the patients either in the anti-gravity group (n=27) or in the traditional rehabilitation (n=27) (randomized study design).~The investigators will assume that anti-gravity treadmill exercise after hospitalization will lead to the faster rehabilitation, better walking quality and balance management compared to the traditional rehabilitation.
The aim of this study is to clarify the effectiveness and the usefulness of the anti-gravity treadmill in postoperative rehabilitation after knee arthroplasty. The investigators will compare anti-gravity treadmill rehabilitation and the traditional postoperative rehabilitation with instructions.~The investigators will assume that anti-gravity treadmill exercise after hospitalization will lead to the faster rehabilitation, better walking quality and balance management compared to traditional rehabilitation methods with instructions, where patient themselves do the exercises at home. Additionally, the investigators will assume that quality of life and physical activity will be more increased in the anti-gravity group than in the traditional rehabilitation.