Effects of Physical Conditioning on Lifting Biomechanics

身体调理对举重生物力学的影响

• 批准号: 6320640
• 负责人: KEVIN P. GRANATA
• 金额: $ 14.75万
• 依托单位: UNIVERSITY OF VIRGINIA
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-30 至 2004-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6320640
• 关键词: biomechanics; clinical research; electromyography; exercise; human subject; muscle strength; occupational health /safety; physical fitness; spine

DESCRIPTION: Occupationally-related low back disorders (LBDs) are the leading cause of lost work days and the most costly occupational safety and health problem facing industry today. Epidemiologic surveys demonstrate that exercise and physical conditioning may act as a prophylaxis to reduce the incidence of occupational LBDs. How and why exercise and physical conditioning influence LBD risk remains unknown. To improve the intervention methods for control of occupational low-back pain, to improve rehabilitation of LBDs, and to identify individuals at increased risk of LBD, it is necessary to quantify how physical conditioning acts to limit low-back injury risk in occupational lifting tasks. Low-back injuries have been attributed to spinal load and spinal stability during lifting and manual materials handling tasks. Factors that contribute to spinal load and stability include lifting technique, spinal kinematic coordination, trunk muscle recruitment and co-contraction, and the design of the lifting task (weight, distance, etc.). It is proposed that exercise can modify lifting and spinal kinematics and muscle recruitment patterns, thereby influencing biomechanical risk associated with spinal load and stability. The goal of this research is to quantify how exercise and physical conditioning modify the biomechanics of lifting in manual materials handling and lifting tasks. Specifically, we intend to investigate factors that might contribute to improved spinal stability and reduced spinal load during simulated manual materials handling tasks. Subjects will participate in an eight-week exercise program in one of four protocols including either, aerobic exercise, strengthening, dynamic spine stabilization, or control (no exercise). Spinal load and spinal stability during simulated manual materials handling lifting tasks will be quantified before beginning the exercise program, midway through, immediately upon completion of the eight week exercise program and four weeks after termination of the exercise protocols. It is hypothesizes that the exercise programs will change the muscle recruitment patterns and spinal kinematics of lifting, thereby modifying spinal load and stability. Spinal load and stability will be quantified using published techniques, including efforts by the principle investigator, and based upon measurements of dynamic lifting kinetics, dynamic spinal kinematics I curvature and trunk muscle recruitment patterns (electromyography) recorded during the lifting tasks. This effort represents the first randomized-control study of exercise and physical conditioning on lifting biomechanics and associated risk factors for LBD.

描述：与职业相关的下背部疾病（LBD）是领先 损失工作日的原因和最昂贵的职业安全和健康 当今行业面临问题。流行病学调查证明了运动 物理条件可以作为预防，以降低 职业LBD。如何以及为什么运动和身体状况影响LBD 风险仍然未知。改善控制方法以控制 职业低背痛，改善LBD的康复，并确定 患有LBD风险增加的个人，有必要量化物理方式 调节行为以限制职业提升任务中的低背部伤害风险。 低背损伤归因于脊柱负荷和脊柱稳定性 在提升和手动材料处理任务中。促成的因素 脊柱负荷和稳定性包括提升技术，脊柱运动学 协调，树干肌肉招募和共同收缩以及设计 提起任务（重量，距离等）。建议运动可以 修改举重，脊柱运动学和肌肉募集模式，从而 影响与脊柱负荷和稳定性相关的生物力学风险。这 这项研究的目标是量化运动和身体状况如何 修改手动材料处理和提升中提升的生物力学 任务。具体而言，我们打算调查可能有助的因素 改善脊柱稳定性和减少模拟手册期间的脊柱负荷 材料处理任务。 受试者将参加四个星期之一的八周运动计划 包括有氧运动，增强，动态脊柱在内的方案 稳定或控制（无运动）。脊柱负荷和脊柱稳定性 在模拟的手动材料处理期间，将量化任务 在开始锻炼计划之前，请立即在 完成八周的锻炼计划和终止后四个星期 练习方案。假设练习计划将 改变肌肉招募模式和举重的脊柱运动学， 从而改变脊柱负荷和稳定性。脊柱负荷和稳定性将是 使用已发表的技术进行量化，包括原则的努力 研究者，并基于动态提升动力学的测量 脊柱运动学I曲率和躯干肌肉募集模式 （肌电图）记录在提升任务中。这项工作代表 关于运动和身体调节的首次随机控制研究 提升生物力学和LBD的相关危险因素。