Revised Force-Endurance Models for the US Workforce

修订后的美国劳动力力量-耐力模型

• 批准号: 8619728
• 负责人: Lora Anne Cavuoto
• 金额: $ 9.09万
• 依托单位: STATE UNIVERSITY OF NEW YORK AT BUFFALO
• 依托单位国家: 美国
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8619728
• 关键词: Revised; Force; Endurance; Models; US

Project Summary Obesity is a risk factor for workplace injury, and its growing prevalence may be associated with increases in the future incidence and cost of injuries. Although the health consequences of obesity have gained increasing attention, there are still major limitations in what is known regarding the effects of obesity level on work capacity and injury risk. This project will assess obesity-related differences in endurance and fatigue, which will provide useful information for understanding the impact of overweight and obesity on the performance of occupational activities and the subsequent risk of injury, particularly for those tasks requiring static postures that can be limited by fatigue development. In addition, the objective of this work is to provide ergonomics practitioners with revised force-endurance models that can be applied for work design and evaluation. Specific Aim 1 will address the main and interactive effects of obesity level and workload for sustained isometric hand grip, shoulder abduction, and torso extension tasks. Endurance will be evaluated at four levels of relative loading to provide results for an occupationally-relevant range of task demands. To achieve this aim, individuals who are non- obese, overweight, or obese and aged between 25-54 years will be recruited and asked to come in for four experimental sessions. During each session, participants will complete an endurance task for each muscle group at one workload level while endurance time and fatigue- related responses are quantified. With the data collected from Specific Aim 1, revised force- endurance models will be developed in Specific Aim 2. It is hypothesized that higher levels of obesity will be associated with impaired endurance capacity. It is also expected that the existing models are not predictive of endurance time for overweight and obese individuals, limiting their utility in ergonomics practice and requiring revised models to be protective of the muscle capacity of the changing workforce. Results from this research will contribute to understanding the impacts of obesity on the development of muscle fatigue, which is important for discerning the link between personal risk factors, such as obesity, and the risk of workplace injury. Application of the revised models can facilitate improved workplace design and job evaluation to accommodate the capacities of workers who are overweight or obese. Consistent with the National Occupational Research Agenda objectives, the long-term goal of the proposed work is to determine the impact of occupational exposures for the prevention of musculoskeletal disorders and the improvement of worker health.

项目摘要 肥胖是工伤的一个危险因素，它的日益流行可能与 增加未来的伤害发生率和成本。虽然对健康的影响 肥胖已经得到越来越多的关注，但在已知的 肥胖程度对工作能力和受伤风险的影响。该项目将评估 肥胖相关的耐力和疲劳的差异，这将提供有用的信息， 了解超重和肥胖对职业表现的影响 活动和随后的受伤风险，特别是对于那些需要静态姿势的任务 会受到疲劳发展的限制。此外，这项工作的目的是提供 具有可应用于工作的修订的力-耐力模型的人机工程学从业者 设计与评价具体目标1将解决肥胖的主要影响和相互影响 持续等长握力、肩外展和躯干伸展的水平和工作负荷 任务将在四个相对载荷水平下评估耐久性， 与职业相关的任务要求范围。为了实现这一目标，非 年龄在25-54岁之间的肥胖、超重或肥胖者将被招募，并被要求 进行四次实验性治疗在每节课中，参与者将完成一个 耐力任务为每个肌肉群在一个工作负荷水平，而耐力时间和疲劳- 相关的反应是量化的。根据从具体目标1收集的数据，修订了力- 耐力模型将在具体目标2中开发。据推测，较高水平的 肥胖将与耐力受损有关。预计现有的 模型不能预测超重和肥胖个体的耐受时间，这限制了他们的 在人体工程学实践中的实用性，并要求修改模型以保护肌肉 改变劳动力的能力。这项研究的结果将有助于了解 肥胖对肌肉疲劳发展的影响，这对于辨别 肥胖等个人风险因素与工伤风险之间的联系。 应用经修订的模式可促进改进工作场所的设计和工作评价， 适应超重或肥胖工人的能力。符合 国家职业研究议程的目标，提出的长期工作目标是 确定职业暴露对预防肌肉骨骼损伤的影响 疾病和改善工人健康。