This study evaluated the effectiveness of ergonomic interventions in material handling operations involving 33 employers and 535 employees from 2012 to 2017. Outcomes included employee-reported low back/upper extremity pain and safety incidents at baseline, every three months, and annually for up to two years. A total of 32.5% of employees completed at least one survey, while 13.6% completed all nine surveys over two years. Among highly exposed employees (who reported handling >= 50 lbs. > 33% of the time), upper extremity pain frequency and severity were lower among those who reported using the intervention routinely versus those that reported using their body strength alone to handle objects >= 50 lbs. After excluding from analyses one employer that used anti-fatigue mats, low back pain frequency was also significantly lower among highly exposed intervention users. In conclusion, there was some evidence that the interventions were effective in reducing employee-reported pain for highly exposed employees.

该研究评估了 2012 年至 2017 年间涉及 33 名雇主和 535 名员工的材料处理操作中人体工程学干预措施的有效性。结果包括员工报告的基线、每三个月和每年一次的腰背/上肢疼痛和安全事故，最多两年年。共有 32.5% 的员工完成了至少一项调查，而 13.6% 的员工在两年内完成了所有九项调查。在高度暴露的员工（报告处理 >= 50 磅 > 33% 的时间）中，报告常规使用干预的员工的上肢疼痛频率和严重程度低于报告仅使用身体力量处理物体的员工 > = 50 磅。在从分析中排除一位使用抗疲劳垫的雇主后，在高度暴露的干预使用者中，腰痛频率也显着降低。总之，有一些证据表明，干预措施可有效减轻员工报告的高度暴露员工的疼痛。