In order to establish a measuring method of electromyogram (EMG) to evaluate the low back load by handling weight and forward bending angle. EMG at Th5-6, Th8-9, Th11-12, L1-2 and L3-4 were measured in ten male subjects. The handling weight was changed at 0, 10, 20 and 30 kg, and the forward bending angle was changed at 0, 30, 60 and 90 degree. The following results were obtained: 1) EMG increased according to the handling weight at all forward bending angles. The increasing rate of EMG at Th5-6 was larger than that at L1-2 or L3-4. Thus, EMG at higher position such as Th5-6 was found to be appropriate to evaluate handling weight-load. 2) The effect of forward bending angle was different by handling weight. EMG at L1-2 and L3-4 increased according to forward bending angle when the handling weight was 0 kg or 10 kg and when the forward bending angle was not greater than 60 degree. However, when the handling weight was 20 kg or 30 kg, EMG and forward bending angle did not show a simple proportional relationship. Thus, EMG at L1-2 or L3-4 could be used to evaluate posture load when the handling weight was light and the bending angle was not so large. However, it was difficult to use EMG to evaluate posture load when the forward bending angle was large or the handling weight was heavy.
{"title":"[Electromyogram measuring method for low back load evaluation of handling weight and forward bending posture].","authors":"A Seo, H Udo, F Yoshinaga","doi":"10.1539/joh1959.35.19","DOIUrl":"https://doi.org/10.1539/joh1959.35.19","url":null,"abstract":"<p><p>In order to establish a measuring method of electromyogram (EMG) to evaluate the low back load by handling weight and forward bending angle. EMG at Th5-6, Th8-9, Th11-12, L1-2 and L3-4 were measured in ten male subjects. The handling weight was changed at 0, 10, 20 and 30 kg, and the forward bending angle was changed at 0, 30, 60 and 90 degree. The following results were obtained: 1) EMG increased according to the handling weight at all forward bending angles. The increasing rate of EMG at Th5-6 was larger than that at L1-2 or L3-4. Thus, EMG at higher position such as Th5-6 was found to be appropriate to evaluate handling weight-load. 2) The effect of forward bending angle was different by handling weight. EMG at L1-2 and L3-4 increased according to forward bending angle when the handling weight was 0 kg or 10 kg and when the forward bending angle was not greater than 60 degree. However, when the handling weight was 20 kg or 30 kg, EMG and forward bending angle did not show a simple proportional relationship. Thus, EMG at L1-2 or L3-4 could be used to evaluate posture load when the handling weight was light and the bending angle was not so large. However, it was difficult to use EMG to evaluate posture load when the forward bending angle was large or the handling weight was heavy.</p>","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"35 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.35.19","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19428267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Significance of two obesity indices, Broca-Katsura and Quetelet, compared with Abdel-Malek index.","authors":"T Kawada, S Suzuki","doi":"10.1539/joh1959.35.38","DOIUrl":"https://doi.org/10.1539/joh1959.35.38","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"35 1","pages":"38-9"},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.35.38","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19428272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Metabolism of organotin compounds in rats after a single oral administration of diphenyltin or dibutyltin compounds].","authors":"S Ohhira, H Matsui","doi":"10.1539/joh1959.35.42","DOIUrl":"https://doi.org/10.1539/joh1959.35.42","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"35 1","pages":"42-3"},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.35.42","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19428273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of change in body weight on serum aminotransferase and gamma-glutamyl transferase levels.","authors":"Y Takashima, T Akamatsu, Y Orido, T Kinoue","doi":"10.1539/joh1959.35.36","DOIUrl":"https://doi.org/10.1539/joh1959.35.36","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"35 1","pages":"36-7"},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.35.36","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19088863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Trends of international research work on immune toxicology and occupational allergy].","authors":"Y Kusaka","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"663-6"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Cervicobrachial and low back disorders].","authors":"H Aoyama","doi":"10.1539/joh1959.34.656","DOIUrl":"https://doi.org/10.1539/joh1959.34.656","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"656-7"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.34.656","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Fatigue of workers in computerized offices].","authors":"K Miyao","doi":"10.1539/joh1959.34.650","DOIUrl":"https://doi.org/10.1539/joh1959.34.650","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"650-1"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.34.650","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Strategy for reducing fatigue in women workers].","authors":"K Sakai","doi":"10.1539/joh1959.34.658","DOIUrl":"https://doi.org/10.1539/joh1959.34.658","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"658-9"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.34.658","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Occupational allergy and immunologic toxicology--special reference to skin diseases].","authors":"A Syouji","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"670-2"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Evaluation of allergic reaction and setting for occupational exposure limits].","authors":"A Ueda","doi":"10.1539/joh1959.34.674","DOIUrl":"https://doi.org/10.1539/joh1959.34.674","url":null,"abstract":"","PeriodicalId":21500,"journal":{"name":"Sangyo igaku. Japanese journal of industrial health","volume":"34 7","pages":"674-6"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1539/joh1959.34.674","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12475291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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