The main goal of this study is to investigate the beneficial effects of the rehabilitation through medical gymnastics for adults with gonarthrosis. Research methods: pedagogical observation, investigation, tests for muscular and articular assessment, statistical-mathematical method and graphical representation of the data. The study was conducted in the specialised gym of the "Sf. Luca" Chronic Disease Hospital of Bucharest, from December 2016 to May 2017, with a group of 10 male and female subjects of 49-67 years old, hospitalised for the treatment of gonarthrosis. Control tests used: height (cm), weight (kg), glycaemia (g/l), blood pressure (mmHg), muscular strength and mobility of knee joint. Medical gymnastics, including exercises of warm-up, mobility and coordination, balance, posture, breathing and non-competitive sport elements, was used for kinetic rehabilitation. The study results confirm the improvement of the condition of patients submitted to an early rehabilitation plan, phased and individualised depending on their diagnosis and particularities, focusing on the morphofunctional and mental aspects. The rehabilitation treatment must be continued at home, workplace or in special spaces, under the supervision of the kinesiotherapist, in order to prevent the possible relapses of the disease and to maintain and improve the functional progress reached during the sessions made in the hospital.