<?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>S1659-097X2018000100001</article-id>
<article-id pub-id-type="doi">10.15359/mhs.15-1.1</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Programas y ejercicios de flexibilidad dentro de las clases de educación física, en niños y niñas escolares, y su efecto en la mejora de la extensibilidad isquiosural: Una revisión sistemática]]></article-title>
<article-title xml:lang="en"><![CDATA[Flexibility Programs and Exercises Within Physical Education Classes for Schoolchildren, and their Effect on the Improvement of Hamstring Extensibility: A Systematic Review]]></article-title>
<article-title xml:lang="pt"><![CDATA[Programas e exercícios de flexibilidade para classes de educação física, em criancas de idade escolar, e seu efeito para melhorar a extensibilidade isquio-sural: Uma revisão sistemática.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soriano-Férriz]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alacid]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Católica San Antonio Murcia Departamento de Ciencias de la Actividad Física y Del Deporte ]]></institution>
<addr-line><![CDATA[Murcia ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Católica San Antonio Murcia Departamento de Ciencias de la Actividad Física y Del Deporte ]]></institution>
<addr-line><![CDATA[Murcia ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2018</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>12</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-097X2018000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-097X2018000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-097X2018000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del presente artículo científico fue considerar la literatura científica existente sobre los efectos que produce en los niños y niñas de escuela primaria la intervención de programas y ejercicios de estiramiento que forman parte de las clases de Educación Física, sobre la extensibilidad de la musculatura isquiosural. Se realizaron búsquedas sobre 5 bases de datos electrónicas en el período comprendido entre los años 2007-2017. Se encontraron 22 artículos y solo 12 fueron analizados pues cumplieron con los criterios de inclusión. De la búsqueda manual de las referencias bibliográficas, se añadieron 3 más, para un total de 15 artículos incluidos. Los resultados señalaron que es posible desarrollar la extensibilidad isquiosural en los escolares a través de programas y ejercicios de estiramiento en las clases de Educación Física. Las puntuaciones en las pruebas mejoran significativamente en los grupos experimentales, pero no en los grupos control. Los programas y ejercicios se pueden llevar a cabo en la fase de calentamiento y en la vuelta a la calma, siendo más efectivo en esta segunda fase. Un volumen de estiramiento entre 4-7 minutos y 2-4 clases por semana, obtienen mejoras estadísticamente significativas en los niveles de extensibilidad. Hasta 1 minuto de volumen provoca aumento. Tras 5 semanas de desentrenamiento los niveles disminuyen. Los profesionales de Educación Física deberían de incluir programas y ejercicios de estiramiento en sus clases para provocar una mejora de la extensibilidad isquiosural en escolares. El aumento del rango del movimiento tiene relación con la eficacia en la práctica deportiva, la disminución del dolor lumbar y alteraciones en el raquis y la prevención de lesiones.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This scientific article aimed to consider the existing scientific literature on the effects that the programs and stretching exercises that are part of the Physical Education classes on the extensibility of the hamstring musculature produce in primary school children. We searched five electronic databases in the period 2007-2017. Twenty-two articles were found, only twelve were analyzed fulfilling the inclusion criteria. From the manual search of the bibliographic references, three more were added, with a total of fifteen articles included. The results indicated that it is possible to develop hamstring extensibility in school children through programs and stretching exercises in Physical Education classes. The scores on the tests improved significantly in the experimental groups, but not in the control groups. The programs and the exercises can be carried out in the warm-up phase and in the return to calm, being more effective in this second phase. A stretch volume between 4-7 minutes and 2-4 classes per week obtain statistically significant improvements in levels of extensibility. Up to one minute of volume causes an increase. After five weeks of detraining, the levels decreased. Physical Education professionals should include programs and stretching exercises in their classes to improve hamstring extensibility in school children. The increase in the range of movement is related to the effectiveness of sports practice, the reduction of low back pain and alterations in the rachis, and the prevention of injuries.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O objetivo deste trabalho científico foi considerar a literatura científica existente sobre os efeitos produzidos pela intervencao dos programas e exercícios de estiramento sobre a extensibilidad da musculatura ísquios-sural, que fazem parte das classes de Educação Física das criancas ensino fundamental. Foram pesquisados &#8203;&#8203;5 bancos de dados eletrônicos no período de 2007-2017. Foram encontrados 22 artigos e apenas 12 foram analisados, pois cumpriram com os critérios de inclusão. Da busca manual das referências bibliográficas, acrescentaram-se 3 mais, para um total de 15 artigos incluídos. Os resultados assinalaram que é possível desenvolver a extensibilidade ísquios-sural aos estudantes através de programas e exercícios de estiramento nas classes de Educação Física. As pontuações em as provas melhoram significativamente nos grupos experimentais, mas não nos grupos de controle. Programas e exercícios podem ser realizados na fase de aquecimento e no retorno à calma, para ser mais eficaz nesta segunda fase. Um volume de estiramento entre 4-7 minutos e 2-4 classes por semana, obtêm melhoras estatisticamente significativas nos níveis de extensibilidade. Até 1 minuto de volume provoca aumento. Depois de 5 semanas sem treinar, os níveis diminuem. Os profissionais de Educação Física deveriam de incluir programas e exercícios de estiramento em suas classes para melhorar a extensibilidade ísquios-sural nos estudantes. O aumento do tempo do movimento está relacionado com eficácia na prática esportiva, a diminuição da dor lumbar, alterações no raquis e a prevenção de lesões.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Educación Física]]></kwd>
<kwd lng="es"><![CDATA[Escolares]]></kwd>
<kwd lng="es"><![CDATA[Flexibilidad]]></kwd>
<kwd lng="en"><![CDATA[physical education]]></kwd>
<kwd lng="en"><![CDATA[schoolchildren]]></kwd>
<kwd lng="en"><![CDATA[flexibility]]></kwd>
<kwd lng="pt"><![CDATA[Educação Física]]></kwd>
<kwd lng="pt"><![CDATA[Escolares]]></kwd>
<kwd lng="pt"><![CDATA[Flexibilidade]]></kwd>
</kwd-group>
</article-meta>
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