Surrey Lynn R, Fineran Ben, Howerton Beth, Mock Andrea, Naylor Drew, Wiegand-Swihart Theresa
Oakland University, School of Education and Human Services, Rochester, MI 48309, USA.
Work. 2003;21(3):265-70.
Since a patient's ability to perform simulated work activities guides return-to-work decisions, a significant question to address is whether the simulated work environment accurately reflects the actual work environment. Work hardening programs have been used extensively as a method of rehabilitating workers to return to their pre-injury functioning levels. Re-training workers to lift boxes is a common method used to simulate the work environment. Although very few boxes used in the real work environment have handles, boxes with handles are often used in the simulated work environment. The difference in compression forces at the L5/S1 joint while lifting boxes with and without handles was investigated. The Lift Trak Motion Analysis system was used to estimate lumbar isometric compression forces exerted while lifting a 20-pound (9.07-kg) box. The results indicated that estimates of compression forces when lifting a box without handles were significantly different (p < 0.01) than when lifting the same box with handles. Based on these results, it is recommended that work hardening professionals carefully re-evaluate the simulated work environments currently being used for treatment.
由于患者执行模拟工作活动的能力会指导重返工作岗位的决策，因此需要解决的一个重要问题是模拟工作环境是否准确反映了实际工作环境。工作强化计划已被广泛用作使工人恢复到受伤前功能水平的一种康复方法。重新训练工人搬运箱子是一种常用的模拟工作环境的方法。尽管在实际工作环境中使用的箱子很少有把手，但在模拟工作环境中经常使用有把手的箱子。研究了搬运有把手和无把手箱子时L5/S1关节处的压缩力差异。使用Lift Trak运动分析系统来估计搬运一个20磅（9.07千克）箱子时施加的腰椎等长压缩力。结果表明，搬运无把手箱子时的压缩力估计值与搬运有把手的同一箱子时相比有显著差异（p < 0.01）。基于这些结果，建议工作强化专业人员仔细重新评估目前用于治疗的模拟工作环境。
