As part of the project, a user study was conducted in Germany, France and Spain. Among other things, biomechanical and physiological data from test subjects was recorded while the product under investigation was being used. The recorded data was used to analyze and optimize the existing ergonomic concept. In particular, the usability, ergonomics, efficiency and strain were examined during the data evaluation. In addition, the product under investigation was compared with a product from another manufacturer in a benchmark study