文章基本信息

标题：Effects of mop handle height on shoulder muscle activity and perceived exertion during floor mopping using a figure eight method
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作者：Mari-Anne WALLIUS ; Saara M. RISSANEN ; Timo BRAGGE 等
期刊名称：Industrial Health
印刷版ISSN：0019-8366
电子版ISSN：1880-8026
出版年度：2016
卷号：54
期号：1
页码：58-67
DOI：10.2486/indhealth.2015-0108
出版社：National Institute of Occupational Safety and Health
摘要：The aim of this study was to investigate effects of mop handle height on electromyographic (EMG) activities of the shoulder muscles and perceived exertion for the shoulder area during floor mopping using a figure eight method. An experimental study with 13 cleaners was conducted using surface EMG and category ratio (CR-10) scale. EMG activity was recorded unilaterally from the upper trapezius, infraspinatus, anterior and middle deltoid muscles. Each subject performed four trials of mopping and each trial consisted of using a different mop handle height (mop adjustment at the level of shoulder, chin, nose and eye) in randomized order. EMG data were normalized to a percentage of maximal voluntary contraction (%MVC). The muscle activities were assessed by estimating the 10th, 50th and 90th percentiles of the amplitude probability distribution function (APDF) of the EMG signals and analysed by linear mixed model analysis. Results showed that shoulder muscle activity was significantly lower when the mop handle height was adjusted to shoulder level or chin level as compared to eye level. These ﬁndings were supported by subjective ratings of exertion. It seems that mop handle height adjustment between shoulder and chin level may be recommended as a basis for figure eight mopping.
关键词：Muscle activity;Electromyography;Perceived exertion;Floor mopping;Cleaner;Shoulder