<?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>0864-0300</journal-id>
<journal-title><![CDATA[Revista Cubana de Investigaciones Biomédicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Invest Bioméd]]></abbrev-journal-title>
<issn>0864-0300</issn>
<publisher>
<publisher-name><![CDATA[ECIMED]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-03002023000100015</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relación del ritmo de repetición del CrossFit WOD Karen con la frecuencia cardíaca y el esfuerzo percibido]]></article-title>
<article-title xml:lang="en"><![CDATA[Relationship of Crossfit wod Karen repetition rate to heart rate and perceived exertion]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bustos-Viviescas]]></surname>
<given-names><![CDATA[Brian Johan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duran Luna]]></surname>
<given-names><![CDATA[Luis Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acevedo-Mindiola]]></surname>
<given-names><![CDATA[Andrés Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Yerena]]></surname>
<given-names><![CDATA[Carlos Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Merchán Osorio]]></surname>
<given-names><![CDATA[Rony David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cárdenas Gonzalez]]></surname>
<given-names><![CDATA[Gloria Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Fundación Universitaria Juan de Castellanos  ]]></institution>
<addr-line><![CDATA[ Tunja]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Pamplona  ]]></institution>
<addr-line><![CDATA[ Norte de Santander]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cundinamarca  ]]></institution>
<addr-line><![CDATA[ Cundinamarca]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>42</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03002023000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03002023000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03002023000100015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  El CrossFit representa un paradigma interesante del fitness para los profesionales del ejercicio y la medicina deportiva. No obstante, aún se desconoce si el ritmo de repetición influye en las respuestas cardiovasculares y la percepción del esfuerzo en este tipo de entrenamiento físico.  Objetivo:  Relacionar el ritmo de repetición del CrossFit WOD Karen con la frecuencia cardíaca y el esfuerzo percibido en sujetos físicamente activos.  Métodos:  Se realizó un estudio descriptivo-correlacional de enfoque cuantitativo a una muestra no probabilística de 20 sujetos. Durante la aplicación de la prueba WOD Karen y el test Course-Navette, la frecuencia cardíaca se monitoreó a través de pulsómetros Polar H7; el esfuerzo percibido se valoró con la escala de Borg CR-10 y el ritmo de repetición se calculó mediante una ecuación matemática. Los datos se analizaron con el paquete estadístico PSPP y se empleó el coeficiente de correlación de Spearman.  Resultados:  La intensidad relativa del entrenamiento (r = -0,67) y la percepción subjetiva del esfuerzo (r = -0,68) se relacionan negativamente en las mujeres. En ambos sexos no existió significación (p &lt; 0,05).  Conclusión:  Las mujeres con un ritmo de repetición más rápido presentaron una frecuencia cardíaca y un esfuerzo percibido más bajo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  CrossFit represents an interesting fitness paradigm for exercise and sports medicine professionals. However, it is still unknown whether the repetition rate of this type of physical training influences cardiovascular responses and perceived exertion.  Objective: To find the relation between the repetition rate of the CrossFit WOD Karen to heart rate and the perceived exertion in physically active subjects.  Methods: A descriptive-correlational study with a quantitative approach was performed with a non-probabilistic sample of 20 subjects. During the application of the WOD Karen test and the Course-Navette test, heart rate was monitored with pulsometers; perceived exertion was assessed through the Borg CR-10 scale and repetition rate was calculated using a mathematical equation. Data were analyzed with the PSPP statistical package and the Spearman's correlation coefficient was used.  Results: Relative training intensity (r = -0.67) and subjective perception of effort (r = -0.68) were negatively related in women. In both genders there was no significance (p &lt; 0.05).  Conclusion: Women with a faster repetition rate had a lower heart rate and lower perceived exertion.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ejercicio]]></kwd>
<kwd lng="es"><![CDATA[fitness físico]]></kwd>
<kwd lng="es"><![CDATA[medicina deportiva]]></kwd>
<kwd lng="es"><![CDATA[salud pública]]></kwd>
<kwd lng="en"><![CDATA[exercise]]></kwd>
<kwd lng="en"><![CDATA[physical fitness]]></kwd>
<kwd lng="en"><![CDATA[sports medicine]]></kwd>
<kwd lng="en"><![CDATA[public health]]></kwd>
</kwd-group>
</article-meta>
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