Work-related musculoskeletal disorders (WMSDs) include symptoms that lead to disruption or exacerbation of musculoskeletal disorders by occupational risk factors such as pain and discomfort, injury, or persistent pain in body structures like the muscles, joints, tendons, ligaments, nerves, bones, and circulatory system (
1). Musculoskeletal disorders are among the most common causes of occupational injuries in developing and developed countries (
2). In addition, it is one of the most common occupational injuries, with a considerable economic burden, because it accounts for one-third of work-related injuries annually (
3). Globally, musculoskeletal disorders and chronic conditions are important problems, with high co- occurrence. Musculoskeletal disorders may contribute to the development of chronic conditions (
4). In Switzerland, 8% of the employed population lost their working days due to WMSDs, accounting for 1.4 million days ($ 185 million) (
5). Several studies investigated the prevalence of WMSDs in different communities. WMSDs are reported in 25% of European countries (
6) and are the leading cause of absenteeism in Western Europe, Canada, and the United States (
7). Factors affecting musculoskeletal disorders include age, gender, and occupational risk factors. Among various jobs, medical staff, particularly nurses and operating room personnel, are at increased risk of WMSDs, due to the provision of medical services (e.g., lifting heavy objects, patient lifting and moving, and using inappropriate equipment) and inappropriate physical activity at work (e.g., bending, turning, standing and doing hand activities) (
8). Several studies investigated common injuries caused by musculoskeletal disorders in nurses and operating room staff worldwide. For instance, Zamanian et al. reported that 100% of their participants developed at least one musculoskeletal disorder during the past 12 months (
2). In the same vein, Karahan et al. reported that 85.7% of nurses suffered from low back pain (LBP) one year after starting their career, which can reduce work efficiency (
9). Another study mentioned LBP as the primary reason for job abandonment in 11% of nurses; in addition to LBP, musculoskeletal disorders in other parts of the body, such as the shoulders, neck, and hands, are the other major problem (
10). In another survey of nurses, back, neck, and shoulder pains are mentioned as the most common injuries (
11). In a study on Iranian nurses, WMSDs are mentioned as the cause of job absence of 7.4% of participants (
12). WMSDs can cause many problems such as disability, mental, physical, and occupational problems, leading to a considerable economic burden, indicating the necessity of paying attention to this disorder. Since musculoskeletal disorders are one of the most common causes of occupational diseases, it is necessary to pay special attention to the prevalence of these disorders in work environments, including the medical environment (
13). Evidence regarding the prevalence of musculoskeletal disorders among nurses and operating room staff and factors contributing to these disorders play a key role in planning for prevention, training, and making decisions. Also, such evidence pave the way for identifying activities that cause such problems and developing training programs, including the courses on the correct ergonomic principles for transporting the patients and objects.