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Muscular activity during staircase cleaning while using an easily adjustable and a non-adjustable mop stick
University of Gävle, Centre of Musculoskeletal Research.
Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Human Work Science.
2008 (English)Conference paper, Presentation (Refereed)
Abstract [en]

Professional cleaners are known to experience considerable musculoskeletal problems due to the static muscular work that have to be maintained throughout their working period as well as those due to highly repetitive movements of the arms and hands. About 80% of the cleaning job is done with the manual cleaning tool. In this study, staircase cleaning was studied and analyzed with special focus on muscular load differences resulting from using an easily adjustable as opposed to a non-adjustable mop stick. Thirteen professional cleaners participated in this study. Surface electromyography (sEMG) was recorded from six muscle groups (left and right wrist extensor, right and left middle deltoid and right and left upper trapezius) while cleaners performed the staircase cleaning task at their normal pace for about five minutes using the easily adjustable and the non adjustable mop stick in random order. At the end of each test the cleaners rated their perceived exertion on the Borg scale (0-10) for the upper part of the body. The results showed significantly higher mean sEMG activity recorded from the right middle deltoid and right upper trapezius while using the non-adjustable stick as compared to the easily adjustable stick (p<0.05). sEMG activity from the left middle deltoid and left upper trapezius showed no significant difference as all participating cleaners were right handed. The cleaners rated less exertion in the upper body parts while using the adjustable mop stick compared to the non-adjustable mop stick. The adjustable stick was also found to be more comfortable to use. It is concluded that while using a non-adjustable mop stick cleaners were compelled to adopt their right hand arm in abducted position in order to steer the mop while cleaning the staircase

Place, publisher, year, edition, pages
Keyword [en]
Industrial engineering and economy - Manufacturing engineering and work sciences
Keyword [sv]
Industriell teknik och ekonomi - Produktion och arbetsvetenskap
Research subject
Industrial Design; Industrial Work Environment
URN: urn:nbn:se:ltu:diva-34169Local ID: 849d06a0-a688-11de-8293-000ea68e967bOAI: diva2:1007419
Annual Conference of the Nordic Ergonomics Society : 11/08/2008 - 13/08/2008
Godkänd; 2008; 20090921 (theohr)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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