<?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>1996-2452</journal-id>
<journal-title><![CDATA[Podium. Revista de Ciencia y Tecnología en la Cultura Física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Podium]]></abbrev-journal-title>
<issn>1996-2452</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Pinar del Río Hermanos Saíz Montes de Oca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1996-24522022000100106</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La rentabilidad del viraje en nadadoras del estilo libre]]></article-title>
<article-title xml:lang="pt"><![CDATA[A rentabilidade da conversão de nadadores para o estilo livre]]></article-title>
<article-title xml:lang="en"><![CDATA[The profitability of the turn in freestyle swimmers]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pentón López]]></surname>
<given-names><![CDATA[Jorge Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Vásquez]]></surname>
<given-names><![CDATA[Luis Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Duarte]]></surname>
<given-names><![CDATA[Luis Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz Carrera]]></surname>
<given-names><![CDATA[Adolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín Rojas]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sancti Spíritus "José Martí" Facultad Cultura Física ]]></institution>
<addr-line><![CDATA[Sancti Spíritus ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Central "Marta Abreu" de Las Villas Facultad Cultura Física ]]></institution>
<addr-line><![CDATA[Villa Clara ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cienfuegos Facultad Cultura Física, Cienfuegos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>17</volume>
<numero>1</numero>
<fpage>106</fpage>
<lpage>119</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1996-24522022000100106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1996-24522022000100106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1996-24522022000100106&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La investigación se refiere a un estudio de la rentabilidad de la acción del viraje del estilo libre en nadadoras escolares. El objetivo para la investigación se centró en evaluar las características temporales durante la acción del viraje en nadadoras de la categoría 13 y 14 años de la provincia de Sancti Spíritus. Para la recogida de la información, se utilizaron los métodos del nivel empírico: la observación científica, así como la de medición. Se utilizaron dos cámaras de videos, ubicadas en serie, y una cámara subacuática marca Sony. Para el análisis temporal, se requirió del software Kinovea, ver 0.9.3. Se aplicó el test de 15 m. para comprobar la rentabilidad del viraje. Se pudo comprobar una pobre efectividad de este elemento técnico en el estilo libre en las nadadoras evaluadas, lo que mostró, de forma generalizada, deficiencias durante la fase de impulso y se comprobó la formación de ángulos muy abiertos de las piernas que favoreció un déficit en la utilización de la potencia de las piernas durante el empuje de la pared, aspecto este que ayudó a disminuir el deslizamiento y comenzar a realizar los movimientos de salida a la superficie de forma prematura, aumentó el tiempo de forma general en la ejecución del viraje, concluyendo que para las categorías escolares es oportuno obtener ángulos entre las articulaciones de tobillos, rodillas y cadera en el rango de los 90° y 110° al momento de iniciar el impulso de la pared.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO A pesquisa diz respeito a um estudo sobre a rentabilidade da ação de viragem em estilo livre em nadadores escolares. O objectivo da investigação foi centrado na avaliação das características temporárias durante a ação de viragem em nadadores de 13 e 14 anos de idade na província de Sancti Spíritus. Para a recolha de informação, foram empregues métodos empíricos: observação científica e medição. Foram instaladas duas câmaras de vídeo, colocadas em série, e uma câmara subaquática Sony. Para a análise temporal, foi utilizado o software Kinovea, ver 0.9.3. O teste de 15 m foi executado para verificar a relação custo-benefício da curva. Foi possível constatar uma baixa eficácia deste elemento técnico no estilo livre dos nadadores avaliados, que mostraram, em geral, deficiências durante a fase de impulso e a formação de ângulos de pernas muito abertos que favoreceram um défice na utilização da força das pernas durante o impulso para a parede, Este aspecto permitiu reduzir o deslizamento e começar a realizar os movimentos de saída para a superfície antecipadamente, aumentou o tempo total na execução da curva, concluindo-se que para as categorias escolares é adequado obter ângulos entre o calcanhar, o joelho e as articulações da anca na gama de 90° e 110° no momento de iniciar o impulso da parede.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The research refers to a study of the profitability of the freestyle turning action in school swimmers. The objective of the research was focused on evaluating the temporal characteristics during the action of the turn in swimmers of the 13 and 14 years old category in the province of Sancti Spíritus. For the collection of information, the empirical level methods used were: scientific observation, as well as measurement. Two video cameras, placed in series, and a Sony underwater camera were used. For the temporal analysis, the Kinovea software, ver 0.9.3, was used. The 15 m test was applied to check the profitability of the turn. It was possible to verify a poor effectiveness of this technical element in the freestyle in the swimmers evaluated, which showed, in a generalized way, deficiencies during the impulse phase and the formation of very open angles of the legs that favored a deficit in the use of the power of the legs during the wall push, This aspect helped to decrease the sliding and to begin to perform the exit movements to the surface prematurely, increased the time in general in the execution of the turn, concluding that for the school categories it is appropriate to obtain angles between the ankle, knee and hip joints in the range of 90° and 110° at the moment of initiating the wall push.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Viraje]]></kwd>
<kwd lng="es"><![CDATA[Rentabilidad]]></kwd>
<kwd lng="es"><![CDATA[Nadadoras]]></kwd>
<kwd lng="es"><![CDATA[Fuerza explosiva]]></kwd>
<kwd lng="es"><![CDATA[Estilo libre.]]></kwd>
<kwd lng="pt"><![CDATA[Rotatividade]]></kwd>
<kwd lng="pt"><![CDATA[Rentabilidade]]></kwd>
<kwd lng="pt"><![CDATA[Nadadores]]></kwd>
<kwd lng="pt"><![CDATA[Força explosiva]]></kwd>
<kwd lng="pt"><![CDATA[Estilo livre.]]></kwd>
<kwd lng="en"><![CDATA[Turnover]]></kwd>
<kwd lng="en"><![CDATA[Profitability]]></kwd>
<kwd lng="en"><![CDATA[Swimmers]]></kwd>
<kwd lng="en"><![CDATA[Explosive strength]]></kwd>
<kwd lng="en"><![CDATA[Freestyle.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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