Work-related musculoskeletal disorders (also referred to as Repetitive Strain Injuries, Cumulative Trauma Disorders, Musculoskeletal Injuries) affect muscles, tendons, nerves, ligaments, and joints in various parts of the body. WMSDs are, by definition, work related, and many different work factors may contribute to their development. The key physical risk factors are force, posture, repetition and duration. Psychosocial risk factors, such as stress and workload also play a role