Background: Awkward posture during work is one of the most critical risk factors for musculoskeletal disorders. A laptop desk fitting with users’ body dimensions plays a crucial role in maintaining proper posture and reducing musculoskeletal disorders. This study aimed to redesign and fabricate a folding ergonomic laptop desk for college students.
Methods: In this experimental applied study, two hundred and seven college students were considered participants to design an ergonomic laptop desk and fifty students for posture evaluation. Six anthropometric dimensions were measured: height, the height of elbows in the sitting position, elbow-elbow breadth, the length and height of both knees in the cross-legged sitting posture, and the length of the elbow-fingers. Then, two best selling laptop desks were selected and the RULA method assessed laptop users’ posture. Finally, using students’ anthropometric dimensions (n=207), a new laptop desk was designed and built in 2017.
Results: The height of our designed laptop desk is adjustable (range of 20-28 cm), with a variable inclination of the desk (0- 34 degrees). It is possible to shorten or lengthen desk legs (48-72 cm), and a special plate of the mouse (19×46 cm) supports both elbows on the sides of the desk. RULA method showed action level 3, which required early change in desks 1 and 2.
Conclusion: Applying user›s and expert opinions, measuring users› body dimensions, and applying those dimensions in design and construction can play a significant role in improving and correcting the laptop›s desks so that it could result in suitable posture in students. |
- Jacobs K, Johnson P, Dennerlein J, Peterson D, Kaufman J, Gold J, et al. University students’ notebook computer use. Applied Ergonomics. 2009;40(3):404-9.
- Dockrell S, Bennett K, Culleton-Quinn E. Computer use and musculoskeletal symptoms among undergraduate university students. Computers & Education. 2015;85:102-9.
- Bowman PJ, Braswell KD, Cohen JR, Funke JL, Landon HL, Martinez PI, et al. Benefits of laptop computer ergonomics education to graduate students. Open Journal of Therapy and Rehabilitation. 2014;2(1):25-32.
- Chang C-HJ, Amick BC, Menendez CC, Robertson M, del Pino RJ, Dennerlein JT. Where and how college students use their laptop computers. Proceedings of the Human Factors and Ergonomics Society Annual Meeting. 2008;52(15):1010-4.
- Rafiee M, Mokhtarinia HR, Hadad O, Reza Soltani P. Pain and discomfort in laptop users: Prevalence and its relation to adopted posture. Razi Journal of Medical Sciences. 2014;21(122):37-45.
- Shokri S GM, Taban E, Ahmadi O, Kouhnavard B. Evaluation of Prevalence of Musculoskeletal Disorders among Students Using Portable Computer in Faculty of Health, Qazvin University of Medical Sciences. Journal of Health Research in Community. 2015;1(3):9-15.
- Harris C, Straker L. Survey of physical ergonomics issues associated with school childrens’ use of laptop computers. International journal of industrial ergonomics. 2000;26(3):337-46.
- Bubric K, Hedge A. Differential patterns of laptop use and associated musculoskeletal discomfort in male and female college students. Work. 2016;55(3):663-71.
- Rathod N, Chandegara N, Gamit P, Mishra N. Corelation of differential pattern of laptop use and associated musculoskeletal discomfort among students and academicians in Surat. 2021.
- Purnomo H, Kurnia F, editors. Ergonomic Student Laptop Desk Design Using The TRIZ Method. 2018 4th International Conference on Science and Technology (ICST); 2018: IEEE.
- Moffet H, Hagberg M, Hansson-Risberg E, Karlqvist L. Influence of laptop computer design and working position on physical exposure variables. Clinical Biomechanics. 2002;17(5):368-75.
- Pheasant S, Haslegrave CM. Bodyspace: Anthropometry, ergonomics and the design of work: CRC press; 2018.
- Hough R, Nel M. Time and space dimensions of computer laptop use amongst third year students of the University of the Free State. South African Journal of Occupational Therapy. 2016;46(1):27-32.
- Mahoney JM, Kurczewski NA, Froede EW. Design method for multi-user workstations utilizing anthropometry and preference data. Applied ergonomics. 2015;46:60-6.
- Soares MM. Translating user needs into product design for the disabled: an ergonomic approach. Theoretical Issues in Ergonomics Science. 2012;13(1):92-120.
- Dianat I, Molenbroek J, Castellucci HI. A review of the methodology and applications of anthropometry in ergonomics and product design. Ergonomics. 2018;61(12):1696-720.
- Dehghan N, Choobineh A, Hasanzadeh J. Interventional ergonomic study to correct and improve working postures and decrease discomfort in assembly workers of an electronic industry. Iran Occupational Health. 2013;9(4).
- Gómez-Galán M, Callejón-Ferre Á-J, Pérez-Alonso J, Díaz-Pérez M, Carrillo-Castrillo J-A. Musculoskeletal Risks: RULA Bibliometric Review. International journal of environmental research and public health. 2020;17(12):4354.
- Sohrabi MS AS, Keshavarz Z, Alijani S, Torkzadeh F, Aghaee R. Design and Development of an Ergonomic Kharak by using students’ anthropometric characteristics of Isfahan University of Art. Health System Research. 2014;9(12):1301-10.
- Helander M. A guide to human factors and ergonomics: Crc Press; 2005.
- Sharifi Z, Osqueizadeh R, Tabatabai Ghomshe SF. Ergonomic redesign of industrial chair. Iranian Journal of Ergonomics. 2015;3(1):1-9.
- Ansari S, Nikpay A, Varmazyar S. Design and development of an ergonomic chair for students in educational settings. Health scope. 2018;7(4).
- Jafarvand M. Redesigned ergonomics laptop desks in conformity with students anthropometric dimensions of Qazvin University of Medical Sciences. Qazvin Qazvin University of medical sciences 2017.
- Mououdi MA, Shokrolahi I, Shahpuri R, Yazdani-charati J. Ergonomically adjustable laptop desk designed based on anthropometric characteristics of 20-30 year-old students of Mazandaran University of Medical Sciences. Iranian Journal of Ergonomics. 2017;5(2):55-60.
- Tirgar A, Aghalari Z, Salari F. Musculoskeletal disorders & ergonomic considerations in computer use among medical sciences students. Iranian Journal of Ergonomics. 2014;1(3):55-64.
- McAtamney L, Corlett EN. RULA: a survey method for the investigation of work-related upper limb disorders. Applied ergonomics. 1993;24(2):91-9.
- Heidari H, Soltanzadeh A, Asemabadi E, Rahimifard H, Mohammadbeigi A. Ergonomic posture analysis of different postures in laptop users at non-official places and related musculoskeletal disorders by rapid upper limb assessment method. Advances in Human Biology. 2019;9(2):135.
- Gautam D, Chacko N. Impact of laptop usage on symptoms leading to musculoskeletal disorders. Journal of Applied and Natural Science. 2017;9(3):1687-90.
- Kaur CM, Pooja S, Prachi P. Analysis of Posture and Workplace of Female Students Using Laptop in Hostel. Ergonomics for Improved Productivity: Springer; 2021. p. 939-47.
- Intolo P, Shalokhon B, Wongwech G, Wisiasut P, Nanthavanij S, Baxter DG. Analysis of neck and shoulder postures, and muscle activities relative to perceived pain during laptop computer use at a low-height table, sofa and bed. Work. 2019;63(3):361-7.
- Jafarvand M, Marandi N, Varmazyar S, Mohammadi E. Investigation of student's satisfaction from the laptop desks using satisfaction questionnaire. Journal Qazvin University of medical sciences 2018;22(1):52-60.
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