An ergonomic Welding Torch reduces physical Load Response and improves Welding Quality in Novice - A pilot study.

Abstract

PURPOSE\n: This crossover pilot study aimed to compare the physical load response of an ergonomically improved welding torch vs. a conventional torch. Materials and methods: 10 inexperienced volunteers performed an experimental augmented virtual welding trial at chest height (ASME code 1G) and overhead (ASME code 4G) with both welding torches in random order. Skeletal muscle load and fatigue were assessed by surface EMG and changes in isometric peak force. The sensation of pain, perceived exertion and welding execution quality were defined as further outcome parameters.\n\n\nRESULTS\nThe muscle load response in 3 out of 8 muscles was lower in favour of the ergonomic welding torch, which went along with a lower sensation of pain and a higher working accuracy.\n\n\nCONCLUSIONS\nAn ergonomically improved welding torch reduces the acute physical load response and sensation of pain, which ultimately allows performing better, and might contribute to the prevention of musculoskeletal diseases in the long-term.