<?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>0212-1611</journal-id>
<journal-title><![CDATA[Nutrición Hospitalaria]]></journal-title>
<abbrev-journal-title><![CDATA[Nutr. Hosp.]]></abbrev-journal-title>
<issn>0212-1611</issn>
<publisher>
<publisher-name><![CDATA[Grupo Arán]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0212-16112020000400011</article-id>
<article-id pub-id-type="doi">10.20960/nh.02940</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El entrenamiento intervalado de alta intensidad incrementa la utilización de ácidos grasos en sujetos con sobrepeso u obesidad. Un estudio aleatorio]]></article-title>
<article-title xml:lang="en"><![CDATA[High intensity interval training increases the utilization of fatty acids in subjects with overweight or obesity. A randomized study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moris]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Floody]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Salazar]]></surname>
<given-names><![CDATA[Cristian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la Frontera Departamento de Educación Física, Deportes y Recreación ]]></institution>
<addr-line><![CDATA[Temuco ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>37</volume>
<numero>3</numero>
<fpage>483</fpage>
<lpage>489</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0212-16112020000400011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0212-16112020000400011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0212-16112020000400011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: el efecto del entrenamiento intervalado de alta intensidad (HIIT) sobre la utilización de grasas durante el ejercicio necesita ser estudiado en mayor profundidad.  Objetivo: determinar el efecto de un programa de entrenamiento HIIT en sujetos con sobrepeso u obesidad sobre la utilización de grasas, la composición corporal y variables cardiovasculares. El segundo objetivo fue comparar las variables de estudio según el tiempo de duración del programa (es decir, 12,16 y 20 semanas).  Material y métodos: se estudiaron 30 sujetos (edad, 44,8 ± 11,6 años). Se formaron 3 grupos de forma aleatoria: el G1 realizó 12 semanas (G1, n = 12, 48,08 ± 8,20 años); el G2 realizó 16 semanas (G2, n = 10, 42,10 ± 11,60 años) y el G3 realizó 20 semanas (G3, n = 8, 43,38 ± 15,76 años). Todos los grupos realizaron el mismo protocolo de HIIT 3 veces por semana.  Resultados: los tres grupos presentaron una disminución de la grasa corporal de forma significativa (p &lt; 0,05), sin diferencias entre grupos. Las variables cardiovasculares no reportaron diferencias entre grupos (p interacción &gt; 0,05). Sin embargo, los grupos disminuyeron la presión arterial sistólica (p &lt; 0,05). En el análisis pre vs. post, los tres grupos presentaron mejoras en el VO2max, sin diferencias entre grupos (p interacción, &gt; 0,05). Por último, los tres grupos aumentaron la utilización de grasas durante el ejercicio (p &lt; 0,05).  Conclusión: el programa incrementó la utilización de grasas durante el ejercicio, disminuyó el tanto por ciento de grasa corporal y se mejoraron parámetros cardiovasculares; sin embargo, después de las 12 semanas es recomendable aplicar variaciones al entrenamiento para maximizar los resultados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: the effect of high intensity interval training (HIIT) on fat utilization during exercise needs to be studied in depth.  Objective: to determine the effect of HIIT training program in subjects with overweight or obesity on the use of fat during exercise, body composition and cardiovascular variables. The second objective was to compare the variables according to the duration of the program (i.e., 12, 16 and 20 weeks).  Material and methods: 30 subjects were studied (age 44.8 ± 11.6 years). Three groups were formed at random, the G1 (12 weeks, n = 12, 48.08 ± 8.20 years), G2 (16 weeks, n = 10, 42.10 ± 11.60 years) and G3 (20 weeks, n = 8, 43.38 ± 15.76 years). All groups performed HIIT 3 times per week.  Results: the three groups showed a significant decrease in body fat percentage (p &lt; 0.05), without differences between groups. Similarly, cardiovascular variables did not report differences between groups (p-interaction &gt; 0.05) after the intervention; however, the groups reported a significant decrease systolic blood pressure (p &lt; 0, 05). In the pre vs. post analysis by groups, the three groups showed improvements in VO2max without differences between groups (p-interaction &gt; 0.05). Finally, the three groups increased the fats utilization during exercise (p &lt; 0.05).  Conclusion: the program increased fat utilization during exercise, decreased body fat % and improved cardiovascular parameters, however after 12 training weeks it is advisable to apply variations to training to maximize results.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ejercicio físico]]></kwd>
<kwd lng="es"><![CDATA[Capacidad cardiorrespiratoria]]></kwd>
<kwd lng="es"><![CDATA[Presión arterial]]></kwd>
<kwd lng="es"><![CDATA[Obesidad]]></kwd>
<kwd lng="en"><![CDATA[Physical exercise]]></kwd>
<kwd lng="en"><![CDATA[Cardiorespiratory capacity]]></kwd>
<kwd lng="en"><![CDATA[Blood pressure]]></kwd>
<kwd lng="en"><![CDATA[Obesity]]></kwd>
</kwd-group>
</article-meta>
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