Environmental and Occupational Health Program, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon, USA.
J Agromedicine. 2023 Apr;28(2):309-320. doi: 10.1080/1059924X.2022.2068715. Epub 2022 May 3.
Commercial Dungeness crab fishermen's manual crab pot handling activities can be done in harsh outdoor working environments at sea and can pose well-known physical risk factors associated with musculoskeletal injury including forceful exertion, repetition and awkward posture. The nonfatal injury rate in this fishing fleet is 3.4 per 1,000 full-time equivalent workers. Two-thirds of self-reported injuries in the fleet were musculoskeletal sprains and strains. To date, no objective biomechanical assessment of musculoskeletal disorder (MSD) risk has been conducted due to the challenging work environment.
The aim of this study was to determine the feasibility of collecting objective biomechanical assessments (i.e., posture and repetition) using inertial measurement unit (IMU) sensors placed on the arms and torso of professional deckhands (n = 7) while at sea, harvesting Dungeness crab. Based on the IMU-measured posture data, fishermen's anthropometry, and crab pot weights, biomechanical loading of the low back and both shoulders was estimated.
The IMU sensor data showed that commercial Dungeness crab fishing is highly repetitive and poses awkward postures in the shoulders and back. The estimated static low back compression, shear force, and flexion moment about the shoulders and low back (L5/S1) indicate potential injury risk associated with harvesting crab.
The results indicate that objective biomechanical assessment using the IMU sensors is feasible in the commercial fishing environment.
商业捕蟹渔民手动操作蟹笼的活动是在海上恶劣的户外工作环境中进行的，可能会产生与肌肉骨骼损伤相关的已知物理风险因素，包括用力过度、重复和姿势不当。该渔船上非致命性伤害率为每千名全职等效工人 3.4 人。该船队中三分之二的自我报告伤害是肌肉骨骼扭伤和拉伤。迄今为止，由于工作环境具有挑战性，尚未对肌肉骨骼疾病 (MSD) 风险进行客观的生物力学评估。
本研究的目的是确定使用惯性测量单元 (IMU) 传感器在海上收集职业甲板工人（n=7）手臂和躯干的客观生物力学评估（即姿势和重复）的可行性，同时收获 Dungeness 蟹。根据 IMU 测量的姿势数据、渔民的人体测量数据和蟹笼的重量，估计了低背和双肩的生物力学负荷。
IMU 传感器数据显示，商业 Dungeness 蟹捕捞的重复性很高，并且在肩部和背部存在姿势不当的问题。对肩部和背部（L5/S1）的静态下背部压缩、剪切力和弯曲力矩的估计表明，与收获蟹相关的潜在受伤风险。
结果表明，在商业捕捞环境中使用 IMU 传感器进行客观的生物力学评估是可行的。
