Laboratoire de Biomécanique et Mécanique des Chocs Univ Lyon, Univ Gustave Eiffel, Univ Claude Bernard Lyon 1, LBMC UMR T_ 9406, F-69622 Lyon, France.
IISE Trans Occup Ergon Hum Factors. 2022 Jul-Sep;10(3):142-150. doi: 10.1080/24725838.2022.2110544. Epub 2022 Sep 4.
OCCUPATIONAL APPLICATIONSModifying the spinal curvature is an empirical approach to treating upper limb musculoskeletal disorders, often attributed to the balance between physical stress and individual functional capacities. We completed an experimental biomechanical study to quantify the effect of seated spinal posture on upper limb functional capacities. Isometric maximum muscle voluntary forces (MVFs) were measured at participants' shoulder, elbow, and wrist. Fatiguability was also assessed during a repetitive painting task. Participants were asked to assume both slouched and erect spinal postures, in a random order. In the erect posture, participants achieved higher shoulder and elbow isometric MVF levels and took longer to reach a fatigue threshold. Thus, spinal posture tends to remotely influence upper limb functional capacities, especially at the shoulder and elbow. Ergonomists should consider spinal posture even when focusing on musculoskeletal disorders of the upper limb.
职业应用
改变脊柱曲率是治疗上肢肌肉骨骼疾病的一种经验方法，通常归因于身体应激和个体功能能力之间的平衡。我们完成了一项实验生物力学研究，以量化坐姿脊柱姿势对上肢功能能力的影响。在参与者的肩部、肘部和手腕处测量等长最大肌肉自愿力 (MVF)。在重复绘画任务中还评估了疲劳性。参与者被要求以随机顺序分别采用懒散和直立的脊柱姿势。在直立姿势中，参与者达到了更高的肩部和肘部等长 MVF 水平，并且需要更长时间才能达到疲劳阈值。因此，脊柱姿势往往会远程影响上肢功能能力，尤其是肩部和肘部。即使专注于上肢肌肉骨骼疾病，人体工程学家也应该考虑脊柱姿势。
