The author discusses the evaluation of the effect of therapeutic exercises using physio balls according to the FBL concept of Klein-Vogelbach. Using polyelectromyography (8-channel EMG), the author used in healthy probands kinesiological analysis evaluating during exercises the sequence and intensity of involvement of different muscles or muscle groups. The results of the investigation proved that there are certain differences between empirically described effects of exercises accor- ding to the FBL concept of Klein-Vogelbach and the results obtained by PEMG analysis. In c onclusion the author indicates the orientation of future research of the given problem.

        Key words: FBL concept, PEMG, therapeutic exercise, physio balls