Dynamic capacity of the spine was measured on the basis of electrokinesiological findings (EK) with the purpose of finding out how the clinical classification factors of the lumbosacral spine (LS) affect the kinematic indicators. The EK scan contains quantified kinematic and myoelectrical data on the LS spine recorded during motion of the body in the sagittal plane. A total number of 110 patients with low back pain and/or ischialgia of degenerative etiology were examined and compared with 42 healthy controls. Clinical examination was used to classify the patients into four groups according to the severity of the existing symptoms. The EK data obtained for the group of healthy controls served as reference values. A deterioration in values of the kinematic indicators (prolonged duration and reduced amplitude and speed of the entire movement) was observed in patients with more severe degree of clinical classification of LS syndrome (p < 0.01 for total duration of the movement; p < 0.001 for the total speed and amplitude). The results show that the kinematic measurement data are in accordance with clinical classification of painful condition of the lumbosacral spine, while deviation is more prominent in patients classified as rather severe clinical cases.