<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0123-3033</journal-id>
<journal-title><![CDATA[Ingeniería y competitividad]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. compet.]]></abbrev-journal-title>
<issn>0123-3033</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-30332022000200012</article-id>
<article-id pub-id-type="doi">10.25100/iyc.v24i2.11393</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A comparative muscular assessment of the exoskeleton in a scaffold building operation, case study.]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación muscular comparativa del uso de un exoesqueleto en la operación de armado de andamios, caso de estudio]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peláez]]></surname>
<given-names><![CDATA[Sebastián A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Bernal]]></surname>
<given-names><![CDATA[Oscar D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mondragón]]></surname>
<given-names><![CDATA[Iván F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zea]]></surname>
<given-names><![CDATA[Christian R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Institución Universitaria Politécnico Grancolombiano Escuela de Optimización, infraestructura y automatización ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Pontificia Universidad Javeriana Departamento de Ingeniería Electrónica ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontificia Universidad Javeriana Departamento de Ingeniería Sistemas ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Pontificia Universidad Javeriana Departamento de Ingeniería Industrial ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>24</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-30332022000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-30332022000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-30332022000200012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The job in medium and high voltages lines for the Enel-Codensa Organization has generated discomfort reports in parts of the body, such as the shoulder and back also has been develop increase in absenteeism due to the development of occupational diseases such as lumbago and illnesses in the shoulder. The muscle evaluation of this case study was applied to a group of workers from the Colombian company, Enel-Codensa, which has an interest in improving the working conditions of its workers including exoskeletons in the development of its work. To achieve this, eight muscles were evaluated in which electromyography (EMG) was used in 20 volunteer participants, consisting of 12 electrical technicians and eight volunteers. The aim of the study was to determine whether a decrease in muscular effort occurred when the workers used the exoskeleton, to compare experienced and inexperienced subjects, and ultimately to analyze whether muscular activity varied with the use of an exoskeleton. As a result, muscular effort was lower in all the muscles when using the exoskeleton. However, the activity remained above 10% of muscular effort on average, which can generate muscular fatigue if such activity is maintained during an 8-hour day. The analysis showed that there is no difference when performing the activity with or without an exoskeleton except for the flexor carpi radialis muscle. Alternatively, when comparing the two groups, experts, and novices, it was found that the muscular activity of the experts was greater by 1%. As the study was performed, it was found that among this group, there was not an equality of measurements in six of the eight muscles. In conclusion, the scaffold erection test demonstrated muscular effort in the forearm and arm for both samples. To reduce this muscular effort, it is recommended to provide tools or redesign the task.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El trabajo de los lineros de media y alta tensión en la organización Enel-Codensa ha generado reportes de dolencias en partes del cuerpo, como lo son hombro y espalda y aumento de los ausentismos por desarrollo de enfermedades de laborales como los son los lumbagos y el manguito rotador. La evaluación muscular del caso de estudio se realizó a un grupo de trabajadores de la empresa colombiana Enel-Codensa, la cual tiene interés en mejorar las condiciones de trabajo de sus colaboradores, considerando la utilización de exosqueletos en el trabajo, con el fin de contrarrestar los elementos mencionados. Para lograrlo, se evaluaron ocho músculos. Se hizo uso de electromiografía (EMG) en 20 participantes voluntarios, doce linieros de alta tensión y ocho voluntarios. Lo anterior, con el fin de determinar si existe o no disminución en el esfuerzo muscular al usar el exoesqueleto; y comparar también si entre sujetos con experiencia y sin experiencia, la actividad muscular varia al usar el exoesqueleto. Como resultado se obtuvo que el esfuerzo muscular es menor en todos los músculos al usar el exoesqueleto. Sin embargo, la actividad se mantiene por encima del 10% de esfuerzo muscular en promedio, lo que puede generar fatiga muscular si se mantiene durante una jornada de ocho horas. El análisis estadístico de diferencia de medias dio como resultado que no existe diferencia entre realizar la actividad con o sin exoesqueleto excepto para el musculo Flexor Carpi Radial. Por otra parte, al realizar el comparativo entre los dos grupos, expertos y novatos, se encontró que la actividad muscular de los expertos es mayor en un 1%. Cuando se realizaron pruebas estadísticas de comparación de medias entre este grupo se no encontró igualdad de medidas en seis de los ocho músculos. En conclusión, para la prueba de armado de andamio, hay esfuerzo muscular en el antebrazo y brazo para ambas muestras. Para disminuir el esfuerzo muscular se recomienda brindar herramientas que contribuyan a una disminución de este o rediseñar la tarea.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ergonomics]]></kwd>
<kwd lng="en"><![CDATA[Electromyography]]></kwd>
<kwd lng="en"><![CDATA[Working Conditions]]></kwd>
<kwd lng="en"><![CDATA[Exoskeleton]]></kwd>
<kwd lng="es"><![CDATA[Ergonomía]]></kwd>
<kwd lng="es"><![CDATA[Electromiografía]]></kwd>
<kwd lng="es"><![CDATA[Condiciones de Trabajo]]></kwd>
<kwd lng="es"><![CDATA[Exoesqueleto]]></kwd>
</kwd-group>
</article-meta>
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