Muscle use and force scores A scoring system was developed to include the additional load on the musculoskeletal system caused by excessive static muscle work, repetitive motions and the requirement to exert force or maintain an external load while working. These scores are calculated for each of the groups A and B and recorded in the appropriate boxes on the score sheet. After the scores A and B have been calculated from Tables 1 and 2, the muscle use and force scores and added to them as shown below (see Figures 4 and 5):