<?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>0120-4157</journal-id>
<journal-title><![CDATA[Biomédica]]></journal-title>
<abbrev-journal-title><![CDATA[Biomédica]]></abbrev-journal-title>
<issn>0120-4157</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-41572018000200224</article-id>
<article-id pub-id-type="doi">10.7705/biomedica.v38i0.3964</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Niveles de actividad física, calidad de vida relacionada con la salud, autoconcepto físico eíndice de masa corporal: un estudio en escolares colombianos]]></article-title>
<article-title xml:lang="en"><![CDATA[Levels of physical activity, health-related quality of life, physical self-concept and body-mass index among Colombian students]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palomino-Devia]]></surname>
<given-names><![CDATA[Constanza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Oyola]]></surname>
<given-names><![CDATA[Felipe Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Oliver]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Tolima Facultad de Ciencias de la Educación ]]></institution>
<addr-line><![CDATA[Ibagué ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Pablo de Olavide Facultad de Ciencias del Deporte ]]></institution>
<addr-line><![CDATA[Sevilla ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>38</volume>
<numero>2</numero>
<fpage>224</fpage>
<lpage>231</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-41572018000200224&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-41572018000200224&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-41572018000200224&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción.  La actividad física, la calidad de vida relacionada con la salud, el autoconcepto y el índice de masa corporal son indicadores de un estilo de vida saludable.  Objetivo.  Determinar el nivel de actividad física y de sedentarismo, la calidad de vida relacionada con la salud, el autoconcepto físico y el índice de masa corporal en escolares colombianos de educación secundaria y media.  Materiales y métodos. Participaron en el estudio 1.253 estudiantes entre los 10 y los 20 años (601 hombres y 652 mujeres) (14,62±2,01). Para las mediciones se utilizaron una báscula, un tallímetro, el cuestionario internacional de actividad física, el cuestionario abreviado de salud SF-12® y el cuestionario de autoconcepto físico (CAF) en su versión española.  Resultados. Los análisis estadísticos mostraron un mayor índice de masa corporal en las estudiantes, en tanto que en los estudiantes se registraron valores más altos en el autoconcepto de la condición física y la competencia, con diferencias estadísticamente significativas (p&lt;0,05). Además, se encontró que las mujeres registraban mayores puntuaciones en la actividad física moderada y vigorosa, y los hombres, en la caminata. Las puntuaciones fueron mayores en las dimensiones de la calidad de vida relacionada con la salud, excepto en la función social, lo cual difiere significativamente con las de la salud general, el rol emocional, la salud mental y la vitalidad (p&lt;0,05).  Conclusiones.  Se estableció una relación entre el índice de masa corporal y el autoconcepto de condición física y competencia percibida, y entre el índice de masa corporal y la salud general, la función física, la salud mental y la vitalidad. Asimismo, el sedentarismo se relacionó con la salud en general, el dolor corporal y el rol físico (p&lt;0,05).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Physical activity, health-related quality of life, self-concept and body-mass index are indicators of a healthy lifestyle.  Objective: To determine the levels of physical activity and sedentary lifestyle, the health-related quality of life, the physical self-concept and the body-mass index in Colombian middle and high-school students.  Materials and methods:  We included 1,253 students between 10 and 20 years of age (601 men and 652 women) in the study. We used the following instruments for the measurements: A weighing machine, a stadiometer, the International Physical Activity Questionnaire, the 12-Item Short Form HealthSurvey(SF-12®), and the Physical Self-concept Questionnaire in its Spanish version.  Results:  The statistical analysis showed higher levels in the body-mass index among female students and higher scores for the physical condition, self-concept and competence among male students, with meaningful statistical differences (p&lt;0,05). Additionally, women had higher scores in moderate and vigorous physical activity, while men had higher scores in walking. Men got higher scores in the dimension of health-related quality of life, except in the social function, which differed significantly from the general health, emotional role, mental health, and vitality dimensions.  Conclusions:  We found a relation between the body-mass index and the physical condition and competence self-concept, as well as between body-mass index and general health, physical function, mental health and vitality. We also found a relation between a sedentary lifestyle and general health, body pain, and physical role.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ejercicio]]></kwd>
<kwd lng="es"><![CDATA[autoimagen]]></kwd>
<kwd lng="es"><![CDATA[calidad de vida]]></kwd>
<kwd lng="es"><![CDATA[índice de masa corporal]]></kwd>
<kwd lng="es"><![CDATA[género y salud]]></kwd>
<kwd lng="en"><![CDATA[Exercise]]></kwd>
<kwd lng="en"><![CDATA[self-concept]]></kwd>
<kwd lng="en"><![CDATA[quality of life]]></kwd>
<kwd lng="en"><![CDATA[body mass index]]></kwd>
<kwd lng="en"><![CDATA[gender and health]]></kwd>
</kwd-group>
</article-meta>
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