<?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>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562025000100129</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v27.2554</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The Correlation Between Nordic Hamstring Strength and Agility and Speed Performance in National Badminton Athletes]]></article-title>
<article-title xml:lang="es"><![CDATA[La correlación entre la fuerza de los isquiotibiales nórdicos y el rendimiento en agilidad y velocidad en atletas nacionales de bádminton]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Karaka&#351;]]></surname>
<given-names><![CDATA[&#304;lyas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Emre Susuz]]></surname>
<given-names><![CDATA[Yunus]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Akarçe&#351;me]]></surname>
<given-names><![CDATA[Cengiz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[&#350;em&#351;ek]]></surname>
<given-names><![CDATA[Önder]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[S&#305;dd&#305;k Çemç]]></surname>
<given-names><![CDATA[Muhammed]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Demirok]]></surname>
<given-names><![CDATA[Kemal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Y&#305;ld&#305;z]]></surname>
<given-names><![CDATA[Yeliz Ay]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ay&#305;lgan]]></surname>
<given-names><![CDATA[Ercan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Turkish Military Academy Department of Physical Education and Sports ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Gazi University Faculty of Sport Sciences ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Düzce University Faculty of Sport Sciences ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Bo&#287;aziçi University Department of Physical Education and Sports ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Republic of Türkiye Ministry of Youth and Sports  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Alanya Alaaddin Keykubat University Department of Coaching Education ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>27</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562025000100129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562025000100129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562025000100129&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The purpose of this research was to determine the connection between Nordic hamstring power, and agility and speed performance among Turkish national badminton players. The study included 11 male and 6 female national badminton players. The hamstring muscle power of the athletes was measured using the H-Bord machine. Additionally, agility performance was evaluated using the Agility T-Test, and the 10-meter sprint performance was measured using an electronic photocell. An analysis of the study findings revealed a statistically significant difference between NHTecc(a) and NHTecc(b) hamstring muscle strength, and the T-test and 10-meter sprint scores in terms of the gender variable. Furthermore, a strong negative correlation was observed between participants&#8217; NHTecc(a) and NHTecc(b) leg strength and their T-test performance. Supporting this finding, a negative correlation was also identified between NHTecc(a) and NHTecc(b) leg power and 10-meter sprint performance. In conclusion, this research analyzed the effects of Nordic hamstring strength on agility and speed performance in badminton athletes and identified a strong negative correlation between these variables. In this context, it is suggested that training programs aimed at improving eccentric muscle strength may help optimize agility and speed performance, particularly in the sport of badminton.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El propósito de esta investigación es determinar la conexión entre la potencia de los isquiotibiales nórdicos y el rendimiento en agilidad y velocidad entre los jugadores nacionales turcos de bádminton. En el estudio participaron 11 jugadores masculinos y 6 jugadoras femeninos nacionales de bádminton. La fuerza de los músculos isquiotibiales de los atletas se midió utilizando la máquina H-Bord. Además, el rendimiento en agilidad se evaluó utilizando la prueba T de agilidad, y el rendimiento en sprint de 10 m se midió utilizando una fotocélula electrónica. Un análisis de los resultados del estudio reveló una diferencia estadísticamente significativa entre la fuerza muscular isquiotibial N&#304;Pecc(a) y N&#304;Pecc(b) y las puntuaciones de la prueba T y del sprint de 10 m en cuanto a la variable de género. En conclusión, esta investigación analizó los efectos de la fuerza de los isquiotibiales nórdicos en el rendimiento de agilidad y velocidad en atletas de bádminton e identificó una fuerte correlación negativa entre estas variables. En este contexto, se sugiere que los programas de entrenamiento dirigidos a mejorar la fuerza muscular excéntrica pueden ayudar a optimizar el rendimiento en agilidad y velocidad, particularmente en el deporte del bádminton.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Eccentric Strength]]></kwd>
<kwd lng="en"><![CDATA[Performance Metrics]]></kwd>
<kwd lng="en"><![CDATA[Training Optimization]]></kwd>
<kwd lng="es"><![CDATA[Fuerza Excéntrica]]></kwd>
<kwd lng="es"><![CDATA[Métricas de Rendimiento]]></kwd>
<kwd lng="es"><![CDATA[Optimización del Entrenamiento]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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