Kotowski Susan E, Davis Kermit G, Waters Thomas R
Low Back and Biomechanics and Workplace Stress Laboratory, University of Cincinnati, Department of Environmental Health, Cincinnati, Ohio 45267-0056, USA.
J Agromedicine. 2009;14(1):33-43. doi: 10.1080/10599240802612604.
There is some evidence that performing farm chores may place youth at risk of musculoskeletal injuries. However, actual investigations of interventions for farm youth have been sparse. The objective of the current study was to investigate two different types of interventions (add-on handles) for shovels, potentially reducing the risk of injury in farm youth. A lumbar motion monitor was used to capture trunk posture and motion while the youth performed a simulated shoveling task--removal of material from an animal stall. Ratings of perceived exertion and comfort of use were also assessed. The results indicate add-on handles decreased sagittal flexion but increased twisting as compared to regular shovels. Perceived ratings were worse for shovels with add-on handles. Overall, there appears to be a trade-off between sagittal and nonsagittal motion and appears to have minimal impact on risk of low back injury. However, further research is necessary to determine the complete ramifications of this trade-off with respect to the biomechanical load within the low back and on other joints.
有证据表明，从事农场 chores 可能会使青少年面临肌肉骨骼损伤的风险。然而，针对农场青少年干预措施的实际调查却很少。本研究的目的是调查两种不同类型的铲子干预措施（附加手柄），可能降低农场青少年受伤的风险。在青少年执行模拟铲土任务（从畜栏中清除物料）时，使用腰部运动监测器来捕捉躯干姿势和运动。还评估了主观用力程度和使用舒适度的评分。结果表明，与普通铲子相比，附加手柄减少了矢状面屈曲，但增加了扭转。附加手柄铲子的主观评分更差。总体而言，矢状面和非矢状面运动之间似乎存在权衡，并且似乎对下背部受伤风险的影响最小。然而，有必要进行进一步研究，以确定这种权衡对下背部和其他关节内生物力学负荷的完整影响。
