Dynamic lumbar-pelvic coordination in the low back during lifting

举重过程中腰部的动态腰椎-骨盆协调

• 批准号: 8180049
• 负责人: SARA E WILSON
• 金额: $ 6.95万
• 依托单位: UNIVERSITY OF KANSAS LAWRENCE
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8180049
• 关键词: Affect; Area; Articular Range of Motion; Back; Biofeedback; Clinical; Disease; Exercise; Exhibits; Goals; Incidence; Injury; Knee; Learning; Lifting; Low Back Pain; Mechanics; Movement; Muscle; Muscle Contraction; Occupational Health; Oxygen Consumption; Patients; Pattern; Pelvis; Performance; Phase; Play; Posture; Public Health; Recurrence; Rehabilitation therapy; Relative (related person); Research; Risk; Role; Running; Source; Stretching; Techniques; Training; Vertebral column; Weight Lifting; Work; Workplace; body mechanics; experience; improved; prevent

DESCRIPTION (provided by applicant): Low back pain (LBP) is a common and costly public and occupational health problem that has been associated with the performance of repetitive lifting tasks in the workplace. Identifying better lifting strategies and training workers and low back pain patients in these strategies could serve to reduce the incidence LBP. The objective of the proposed study is to compare the effects of different lifting strategies on lumbar mechanics (in particular mechanical efficiency) during a lifting task. The long-term goal of our research is to identify safe lifting mechanics and improve rehabilitation approaches for correct body mechanics during lifting in people with LBP. This study will focus on developing a better understanding of the potential role stretch-shortening cycles may play in lumbar mechanics during a lifting task. Stretch-shortening has been shown in a number of repetitive and cyclic movements (running and jumping) to improve mechanical efficiency of the movement. The role of the stretch-shortening in the low back has not been examined. Lumbar-pelvic coordination studies, including preliminary studies by the authors, have shown patterns of hysteresis that would be consistent with a stretch-shortening mechanism. While stretch-shortening may improve mechanical efficiency, making lifting easier, it also will result in eccentric muscle contraction and spine flexion that could cause injury. In this study, the existence and role of stretch-shortening in lumbar mechanics will be investigated. We will investigate the mechanical efficiency of cyclic lifting tasks with different lumbar-pelvic coordination strategies (pelvis-first (high lumbar flexion), neutral, and pelvis-last (low lumbar flexion)). We will also examine the self- selected coordination patterns of novice and experienced lifters. It is hypothesized that those with experience in weight lifting for exercise will preferentially select a more neutral lifting strategy to avoid injury, even though it is less energy efficient. If this research is successful, future research goals will be to take these ideas into the clinical setting and investigate whether training LBP patients to avoid stretch-shortening coordination patterns and helping them build the endurance to be able to use other coordination patterns might help prevent recurrence of LBP injuries. PUBLIC HEALTH RELEVANCE: Low back pain and low back disorders are a common and costly public health problem. This project will examine coordination of the low back posture during lifting tasks and how this varies between novice and experienced lifters. In particular, this project will look at how posture affects the energy required to lift and the potential risks of injury to the muscles and spine.

描述（由申请人提供）：腰痛（LBP）是一种常见且昂贵的公共和职业健康问题，与工作场所重复性举重任务的表现有关。确定更好的举重策略，并对工人和腰痛患者进行培训，可以减少腰痛的发生率。本研究的目的是比较在举重任务中不同的举重策略对腰椎力学（特别是机械效率）的影响。我们研究的长期目标是确定安全的举重力学，并改善在腰痛患者举重时正确的身体力学康复方法。这项研究的重点是更好地理解在举重过程中拉伸-缩短周期在腰椎力学中可能发挥的潜在作用。拉伸缩短已经在许多重复和循环运动（跑步和跳跃）中显示出来，以提高运动的机械效率。拉伸缩短在腰背部的作用尚未被研究。腰盆腔协调研究，包括作者的初步研究，显示迟滞模式与拉伸-缩短机制一致。虽然缩短拉伸可以提高机械效率，使举重更容易，但它也会导致偏心肌肉收缩和脊柱弯曲，可能导致受伤。本研究将探讨拉伸缩短在腰椎力学中的存在及其作用。我们将研究不同腰盆腔协调策略（骨盆先（高腰椎屈曲）、中性和骨盆后（低腰椎屈曲））下循环举重任务的机械效率。我们还将研究新手和有经验的举重运动员的自我选择的协调模式。据推测，那些有举重锻炼经验的人会优先选择更中性的举重策略来避免受伤，即使它不那么节能。如果这项研究成功，未来的研究目标将是将这些想法应用到临床环境中，并研究训练LBP患者避免缩短拉伸的协调模式，并帮助他们建立能够使用其他协调模式的耐力，是否有助于防止LBP损伤的复发。