<?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>0001-6002</journal-id>
<journal-title><![CDATA[Acta Médica Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. costarric]]></abbrev-journal-title>
<issn>0001-6002</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Médicos y Cirujanos de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0001-60022020000100018</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fatiga asociada al cáncer de mama luego de un programa de entrenamiento]]></article-title>
<article-title xml:lang="en"><![CDATA[Fatigue associated with breast cancer after a training program]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira-Rodríguez]]></surname>
<given-names><![CDATA[Javier Eliécer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peñaranda-Florez]]></surname>
<given-names><![CDATA[Devi Geesel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira-Rodríguez]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira-Rodríguez]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velásquez-Badillo]]></surname>
<given-names><![CDATA[Ximena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cañizares-Pérez]]></surname>
<given-names><![CDATA[Yair Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tolteca Hospital Ángeles Lomas Huixquilucan ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Consultorio Independiente Privado  ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Fundación Universitaria de Ciencias de la Salud  ]]></institution>
<addr-line><![CDATA[ Bogotá]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Rafael Núñez  ]]></institution>
<addr-line><![CDATA[ Cúcuta]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Clínica San José  ]]></institution>
<addr-line><![CDATA[ Cúcuta]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Grupo de investigación Aletheia Universidad de Santander. Cúcuta-Colombia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>62</volume>
<numero>1</numero>
<fpage>18</fpage>
<lpage>25</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0001-60022020000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0001-60022020000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0001-60022020000100018&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedente y objetivo:  El cáncer es una de las enfermedades que genera mayor mortalidad en el mundo. Los programas de rehabilitación basados en ejercicios se muestran efectivos y seguros para mitigar los efectos del cáncer. El objetivo fue determinar los cambios de la fatiga asociada al cáncer de mama luego de un programa de entrenamiento de alta intensidad (HIIT), o continuo a intensidad moderada (MICT).  Métodos:  Ensayo clínico aleatorizado con 236 pacientes con cáncer de mama en estadio II, distribuidos en 3 grupos (MICT, HIIT y grupo control), a quienes se les aplicó la escala FACT Fatigue Scale, test de calidad de vida, ecocardiograma, prueba de esfuerzo, tolerancia y percepción nal ejercicio mediante la prueba de caminata de los 6 minutos y escala de Borg, respectivamente. El programa de entrenamiento tuvo una duración de 36 sesiones de 70 minutos, 3 veces por semana.  Resultados:  Luego de comparar los respectivos grupos, se evidenció cambios significativos en todas las variables de los grupos HIIT y MICT (p=&lt;0,05 %) frente al grupo control. Además, hubo una mejoría posentrenamiento, de la fatiga asociada al cáncer de mama en el grupo HIIT (20,4±5,6 vs 5,1±3,6) y MICT (18.6±9.5 vs 8.0±4.2).  Conclusiones:  Estos tipos de entrenamiento mejoraron la tolerancia al ejercicio, fuerza, vo2 y sobre todo, la fatiga asociada al cáncer y la calidad de vida de las pacientes. Y el grupo control de atención habitual sin entrenamiento físico o ejercicio supervisado, no presentó cambios significativos ni mejoras en la fatiga asociada al cáncer de mama.  Trial registration:  Clinicaltrials.gov NCT03915288]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background and objective:  Cancer is one of the diseases that generate the highest mortality in the world. Exercise-based rehabilitation programs are effective and safe to mitigate the effects of cancer. The objective was to determine the changes in fatigue associated with breast cancer after a highintensity training program (HIIT), or a continuous training at moderate intensity (MICT).  Methods:  Randomized clinical trial with 236 patients with stage II breast cancer, distributed in 3 groups (MICT, HIIT, and control group), to whom the FACT-Fatigue Scale and quality of life test were applied and an effort echocardiogram was performed. Tolerance, and perception of the exercise were evaluated through the test of walk of the 6 minutes and scale of Borg respectively. The training program lasted 36 sessions of 70 minutes, 3 times per week.  Results: After comparing the respective groups, significant changes were evident in all the variables of the HIIT and MICT groups (p = &lt;0.05%) compared to the control group. Also, there was a postworkout improvement of fatigue associated with breast cancer in the HIIT group (20.4 ± 5.6 vs. 5.1 ± 3.6) and MICT (18m6 ± 9m5 vs. 8m0 ± 4m2).  Conclusions:  These types of training improved exercise tolerance, strength, VO2 and, above all, cancer-associated fatigue and patients quality of life. The usual care control group without physical training or supervised exercise did not show significant changes or improvements in fatigue associated with breast cancer.  Trial registration:  Clinicaltrials.gov NCT03915288]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cáncer]]></kwd>
<kwd lng="es"><![CDATA[fatiga]]></kwd>
<kwd lng="es"><![CDATA[ejercicio aeróbico]]></kwd>
<kwd lng="es"><![CDATA[entrenamiento de alta intensidad]]></kwd>
<kwd lng="es"><![CDATA[fuerza]]></kwd>
<kwd lng="en"><![CDATA[Cancer]]></kwd>
<kwd lng="en"><![CDATA[fatigue]]></kwd>
<kwd lng="en"><![CDATA[aerobic exercise]]></kwd>
<kwd lng="en"><![CDATA[high intensity training]]></kwd>
<kwd lng="en"><![CDATA[strength.]]></kwd>
</kwd-group>
</article-meta>
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