Defined limits.

The choice calibration system of the Back Module will recognise the ideal position of the test person right at the beginning of each exercise. A foot support and a back rest fitted with highly sensitive pressure sensors form the basis for a pre-defined and fully electronic calibration process. It will make sure that the test person is fixed firmly and comfortably at all times. If this does not suffice, firmness can be corrected by software in five gradations.