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: 8293154
• 负责人: SARA E WILSON
• 金额: $ 6.92万
• 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/8293154
• 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.

描述（由申请人提供）：腰痛 (LBP) 是一种常见且代价高昂的公共和职业健康问题，与工作场所重复性举重任务的执行有关。确定更好的举重策略并对工人和腰痛患者进行这些策略的培训可以有助于降低腰痛的发生率。本研究的目的是比较不同举重策略在举重任务期间对腰椎力学（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进康复方法，以在 LBP 患者举重过程中实现正确的身体力学。 这项研究将侧重于更好地理解拉伸-缩短循环在举重任务期间可能在腰椎力学中发挥的潜在作用。拉伸-缩短已在许多重复和循环运动（跑步和跳跃）中得到体现，以提高运动的机械效率。腰部拉伸缩短的作用尚未得到研究。腰椎-骨盆协调研究，包括作者的初步研究，已经显示出与拉伸-缩短机制一致的滞后模式。虽然拉伸-缩短可以提高机械效率，使举重变得更容易，但它也会导致肌肉偏心收缩和脊柱弯曲，从而可能导致受伤。 在这项研究中，将研究腰椎力学中拉伸-缩短的存在和作用。我们将研究不同腰椎-骨盆协调策略（骨盆优先（高腰椎弯曲）、中立和骨盆最后（低腰椎弯曲））的循环举升任务的机械效率。我们还将检查新手和经验丰富的举重运动员自选的协调模式。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以避免受伤，尽管它的能量效率较低。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，并调查训练 LBP 患者避免拉伸缩短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 损伤复发。