Background. The article describes diagnostic tests which examine lumbar spine mobility in persons treated for discopathy. The aim of the paper was to monitor lumbar spine mobility in persons treated for lumbar discopathy to study the usefulness of combined physiotherapy sessions, isometric exercises and postisometric muscle relaxation. Material and methods. The study participants were 60 men aged 40-45 years who suffered from chronic spinal ailments. In all patients the main reason for the complaints was lumbar intervertebral disc disorder. Elongation angle measurments were performed with use of „Posturometer S” – computerised set for tridimensional evaluation of examined antropometric points. Results and Conclusions. The analysis of subjective pain evaluation revealed that the effects were similar in both examined groups. Analysis of results indicates significant and positive influence of the implemented kinesitherapy on increase of mobility in examined spinal segment.