<?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>1659-097X</journal-id>
<journal-title><![CDATA[MHSalud]]></journal-title>
<abbrev-journal-title><![CDATA[MHSalud]]></abbrev-journal-title>
<issn>1659-097X</issn>
<publisher>
<publisher-name><![CDATA[Escuela de Ciencias del Movimiento Humano y Calidad de Vida, Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-097X2022000100099</article-id>
<article-id pub-id-type="doi">10.15359/mhs.19-1.8</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Percepción del esfuerzo y niveles objetivos de intensidad en clases de Educación Física de escolares de primaria según sexo y estado nutricional: Estudio piloto]]></article-title>
<article-title xml:lang="en"><![CDATA[Perception of effort and objective levels of intensity in physical education classes of Primary schoolchildren according to gender and nutritional status: A pilot study]]></article-title>
<article-title xml:lang="pt"><![CDATA[Percepção do esforço e níveis objetivos de intensidade nas aulas de educação física das crianças do ensino fundamental de acordo com sexo e estado nutricional: Um estudo piloto]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mayorga Aguilar]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Salazar]]></surname>
<given-names><![CDATA[Cristian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cárcamo-Oyarzún]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Frontera  ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de La Frontera  ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de La Frontera  ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>19</volume>
<numero>1</numero>
<fpage>99</fpage>
<lpage>111</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-097X2022000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-097X2022000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-097X2022000100099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El presente estudio aborda el análisis del esfuerzo percibido y tiempo en actividades de intensidad moderada y vigorosa en clases de Educación Física, considerando las diferencias según sexo y el estado nutricional de la persona estudiante. Participaron 95 estudiantes de 5° y 6° año de primaria de escuelas de la ciudad de Coyhaique, Chile. Se utilizó la escala EPInfant para la evaluación del esfuerzo percibido y acelerómetros Actigraph GT3X+ para determinar el tiempo en intensidad moderada y vigorosa. En el esfuerzo percibido no se encontraron diferencias significativas según sexo (p=0,144), pero sí según estado nutricional, siendo los estudiantes con obesidad quienes indican una percepción de esfuerzo mayor que el estudiantado de peso normal (p=0,022). En actividades moderadas y vigorosas dentro de la clase de Educación Física, los niños presentan significativamente más minutos en comparación a las niñas (p=0,017); mientras que los escolares normopeso presentarían levemente mayor tiempo en este nivel de intensidad, sin que esta diferencia sea estadísticamente significativa (p=0,622). El esfuerzo realizado en las clases de Educación Física ha sido percibido como más exigente por los escolares con obesidad, y para esto se deben comprender las dificultades físicas y motrices que este grupo presenta. Asimismo, las niñas han participado un menor tiempo en intensidades moderadas y vigorosas, por lo que es pertinente buscar estrategias que permitan aumentar el tiempo de su participación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study focuses on the analysis of perceived effort and time of moderate and vigorous activities in physical education classes, considering differences based on gender and the nutritional status of schoolchildren. A total of 95 children in 5th and 6th grade of primary school in the city of Coyhaique, Chile, participated in the study. The EPInfant scale was used to assess the perceived effort, and Actigraph GT3X+ accelerometers were used to determine the time of moderate and vigorous activity. No significant differences were found in the perceived effort by gender (p=0.144); instead, by nutritional status, obese students indicated a higher perceived effort than students with a normal weight (p=0.220). Regarding moderate and vigorous activities in Physical Education class, the boys were significantly more active than the girls (p=0.017). In contrast, normal-weight children were slightly more active at this intensity level, but this difference was not statistically significant (p=0.622). The effort in Physical Education classes has been perceived as more demanding by the obese students; for this reason, it is important to understand the physical and motor difficulties that this group presents. Likewise, girls have participated for a shorter time in moderate and vigorous intensities, being pertinent to look for didactic strategies to increase the time of their participation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O presente estudo aborda a análise do esforço e do tempo percebido em atividades de intensidade moderada e vigorosa nas aulas de educação física, considerando as diferenças de acordo com o sexo e o estado nutricional de cada estudante. Participaram do estudo noventa e cinco alunos do 5º e 6º ano do ensino fundamental de escolas da cidade de Coyhaique, no Chile. A escala EPInfant foi utilizada para avaliar o esforço percebido e os acelerômetros Actigraph GT3X+ para determinar o tempo em intensidade moderada e vigorosa. Não foram encontradas diferenças significativas na percepção de esforço segundo o sexo (p=0,144), mas foram encontradas diferenças significativas segundo o estado nutricional, com estudantes obesos indicando uma percepção de maior esforço do que estudantes de peso normal (p=0,022). Nas atividades moderadas e vigorosas nas aulas de Educação Física, os meninos apresentam significativamente mais minutos que as meninas (p=0,017), enquanto os estudantes de peso normal apresentaram um pouco mais de tempo nesse nível de intensidade, embora essa diferença não tenha sido estatisticamente significativa (p=0,622). O esforço feito nas aulas de educação física foi percebido como mais exigente por estudantes obesos, e para isso é necessário compreender as dificuldades físicas e motoras que este grupo apresenta. Da mesma forma, as meninas têm participado por um tempo mais curto em intensidades moderadas e vigorosas, por isso é pertinente procurar estratégias para aumentar o tempo da sua participação.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[percepción de esfuerzo]]></kwd>
<kwd lng="es"><![CDATA[acelerometría]]></kwd>
<kwd lng="es"><![CDATA[educación física]]></kwd>
<kwd lng="es"><![CDATA[niveles de actividad física]]></kwd>
<kwd lng="en"><![CDATA[perceived exertion]]></kwd>
<kwd lng="en"><![CDATA[accelerometry]]></kwd>
<kwd lng="en"><![CDATA[physical education]]></kwd>
<kwd lng="en"><![CDATA[physical activity levels]]></kwd>
<kwd lng="pt"><![CDATA[esforço percebido]]></kwd>
<kwd lng="pt"><![CDATA[acelerometria]]></kwd>
<kwd lng="pt"><![CDATA[educação física]]></kwd>
<kwd lng="pt"><![CDATA[níveis de atividade física]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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