Firing of a cannon: Biomechanical evaluation of ergonomic hazards

Abstract

Musculoskeletal-related occupational illnesses and injuries are endemic in the military and make up a majority of medical visits resulting in decreased combat readiness and degraded human performance. Twenty-five U. S. Marines were involved in a two-day observational study of their live fire exercise. Sixteen (64%) reported becoming injured after returning from combat during a “Call for Fire” exercise and four (16%) were on limited duty at the time of the study. Biomechanical modeling using Three Dimensional Static Strength Prediction Program 6.0.2 found elevated risk for the wrist and low back. The study also uncovered that the exposure profile during the support of the “Call for Fire” exercise is leading to degradations in physical performance and increased exposure to physical work place risk factors resulting in various soft tissue injuries.