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This paper presents a system consisting of a force-measuring device for estimation of the force ability of human muscle groups. It comprises at least one (pressing element) strength sensor which works together with a force-measuring microcontroller based electronic unit. This unit can accurately measure the force exerted onto strength sensor placed inside the force-measuring unit. According to how the equipment is assorted muscle strength of different muscle groups can be measured. Moreover some other physical parameters (e.g. blood pressure and heart rate) during specific strength exercises can be measured consequently. The system can be used for isometric muscle strength measuring as well for dynamical force measuring. The measured values are converted to digital form and stored in memory. Graphic output is also available. [ABSTRACT FROM PUBLISHER]