<?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>S1659-097X2024000100050</article-id>
<article-id pub-id-type="doi">10.15359/mhs.21-1.16622</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Determinants of physical performance and physiological responses during an Official cross-country marathon of mountain-biking (Xcm-Mtb)]]></article-title>
<article-title xml:lang="es"><![CDATA[Determinantes del rendimiento físico y las respuestas fisiológicas durante una maratón oficial de bicicleta de montaña a través del campo (XCM-MTB)]]></article-title>
<article-title xml:lang="pt"><![CDATA[Determinantes do desempenho físico e as respostas fisiológicas durante uma maratona oficial de mountain bike cross-country (Xcm-Mtb)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira Saborosa]]></surname>
<given-names><![CDATA[Guilherme]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Neves Zuri]]></surname>
<given-names><![CDATA[Kallil]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Junqueira Carneiro]]></surname>
<given-names><![CDATA[Túlio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira Melo]]></surname>
<given-names><![CDATA[Bruno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pussieldi]]></surname>
<given-names><![CDATA[Guilherme de Azambuja]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Manoel]]></surname>
<given-names><![CDATA[Francisco de Assis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernandes da Silva]]></surname>
<given-names><![CDATA[Sandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,The Federal University of Lavras Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus Department of Physical Education]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,The Federal University of Lavras Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus Department of Physical Education]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,The Federal University of Lavras Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus Department of Physical Education]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,The Federal University of Minas Gerais Department of Physical Education Exercise Physiology Laboratory]]></institution>
<addr-line><![CDATA[ Belo Horizonte]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,The Federal University of Lavras Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus Department of Physical Education]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,The Federal University of Lavras Department of Physical Education Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,The Federal University of Lavras Department of Physical Education Group of Studies and Research on Neuromuscular Responses (GEPREN), University Campus]]></institution>
<addr-line><![CDATA[Lavras Minas Gerais]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<volume>21</volume>
<numero>1</numero>
<fpage>50</fpage>
<lpage>66</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-097X2024000100050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-097X2024000100050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-097X2024000100050&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  The variables determinants of physical performance in cross-country marathon of mountain biking (XCMMTB) are still unknown.  Objective:  We aimed to verify the training control variables and the physiological responses in an official XCM-MTB race.  Material and methods:  13 athletes (11 men and 2 women; 33.3 ± 12.7 years of age) participated in this study. It was conducted during an official XCM-MTB in Brazil (route of 70 km). The heart rate (HR), altimetry, velocity, temperature, pacing, and power were obtained every 10 km travelled by the STRAVA application. Multiple linear regression analysis was performed to verify whether the variables could predict physical performance.  Results:  The athletes maintained constant HR elevation in the corresponding zone 80% HRmax. They also presented a variation in the pacing (F = 35.82; p &lt; 0.001; d = 0.66) and power (F = 7.20; p &lt; 0.001; d = 0.18) showing higher values in the last 10 km. Only pacing can be considered a predictor of the physical performance (&#946; = 0.958; t = 7.30; p &lt; 0.001), specifically the one at 20 km (F = 10.23; p = 0.004; R2 = 0.82).  Conclusion:  The study concluded that the analyzed variables are reliable for the performance control in an official XCMMTB race. HR and power are variables that can be used to prescribe and control training, as they change according to the requirements of the race. Power can also be used as a performance predictor as it is directly influenced by terrain.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  Las variables determinantes del rendimiento físico en una maratón de ciclismo de montaña (XCM-MTB) aún son desconocidas.  Objetivo:  Nuestro objetivo fue verificar las variables fisiológicas y de control del entrenamiento en una carrera oficial de XCM-MTB.  Materiales y métodos:  13 atletas (11 hombres y 2 mujeres; 33,3 ± 12,7 años) participaron en este estudio. La investigación se realizó durante un XCM-MTB oficial en Brasil (recorrido de 70 km). La frecuencia cardíaca (FC), la altimetría, la velocidad, la temperatura, el ritmo y la potencia se obtuvieron cada 10 km recorridos por la aplicación STRAVA. Se realizó un análisis múltiple de regresión linear para verificar si las variables podían predecir el rendimiento físico.  Resultados:  Hubo una elevación constante de la FC correspondiente al 80 % de la FCmax. El ritmo presentó una variación (F = 35,82; p &lt; 0,001; d = 0,66) y potencia (F = 7,20; p &lt; 0,001; d = 0,18) con valores superiores en los últimos 10 km. Solo el ritmo a los 20 km (F = 10,23; p = 0,004; R2 = 0,82) puede considerarse predictor del rendimiento físico (&#946; = 0,958; t = 7,30; p &lt; 0,001).  Conclusión:  El estudio concluyó que las variables analizadas son fiables para la prescripción y control del entrenamiento en una carrera oficial de XCM-MTB. La FC y la potencia son variables que se pueden utilizar para prescribir el entrenamiento. La potencia también se puede utilizar para predecir el rendimiento, ya que está directamente influenciada por el terreno.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo:  Introdução:  As variáveis determinantes do desempenho físico na maratona de mountain bike cross-country (XCMMTB) ainda são desconhecidas.  Objetivo:  Nosso objetivo foi verificar as variáveis de controle de treinamento e as respostas fisiológicas em uma corrida oficial de XCMMTB.  Material e métodos:  Participaram deste estudo 13 atletas (11 homens e 2 mulheres; 33,3 ± 12,7 anos de idade). O estudo foi realizado durante uma corrida oficial de XCM-MTB no Brasil (percurso de 70 km). A frequência cardíaca (FC), altimetria, velocidade, temperatura, ritmo e potência foram obtidos a cada 10 km percorridos através do aplicativo STRAVA. Foi realizada uma análise de regressão linear múltipla para verificar se as variáveis poderiam prever o desempenho físico.  Resultados:  Os atletas mantiveram uma elevação constante na FC na zona correspondente a 80% da FC máxima. Apresentaram também variação no ritmo (F = 35,82; p &lt; 0,001; d = 0,66) e na potência (F = 7,20; p &lt; 0,001; d = 0,18), mostrando valores mais altos nos últimos 10 km. Apenas o ritmo pode ser considerado um preditor do desempenho físico (&#946; = 0,958; t = 7,30; p &lt; 0,001), especificamente no ponto dos 20 km (F = 10,23; p = 0,004; R2 = 0,82).  Conclusão:  O estudo concluiu que as variáveis analisadas são confiáveis para o controle de desempenho em uma corrida oficial de XCMMTB. A FC e a potência são variáveis que podem ser usadas para prescrever e controlar o treinamento, pois mudam de acordo com as exigências da corrida. A potência também pode ser usada como um preditor de desempenho, pois é diretamente influenciada pelo terreno.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[training]]></kwd>
<kwd lng="en"><![CDATA[heart rate]]></kwd>
<kwd lng="en"><![CDATA[physical performance]]></kwd>
<kwd lng="en"><![CDATA[power]]></kwd>
<kwd lng="es"><![CDATA[capacitación]]></kwd>
<kwd lng="es"><![CDATA[ritmo cardiaco]]></kwd>
<kwd lng="es"><![CDATA[desempeño físico]]></kwd>
<kwd lng="es"><![CDATA[energía]]></kwd>
<kwd lng="pt"><![CDATA[treinamento]]></kwd>
<kwd lng="pt"><![CDATA[frequência cardíaca]]></kwd>
<kwd lng="pt"><![CDATA[desempenho físico]]></kwd>
<kwd lng="pt"><![CDATA[energia]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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