<?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>2665-2056</journal-id>
<journal-title><![CDATA[Revista de investigación e innovación en ciencias de la salud]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Investig. Innov. Cienc. Salud]]></abbrev-journal-title>
<issn>2665-2056</issn>
<publisher>
<publisher-name><![CDATA[Fundación Universitaria María Cano]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2665-20562022000200137</article-id>
<article-id pub-id-type="doi">10.46634/riics.136</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Training intensity distribution on running time in amateur endurance runners: a scoping review]]></article-title>
<article-title xml:lang="es"><![CDATA[Distribución de intensidades de entrenamiento sobre el tiempo de carrera en corredores recreativos de resistencia: revisión de alcance]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-González]]></surname>
<given-names><![CDATA[Jerman Jesyd]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arboleda Serna]]></surname>
<given-names><![CDATA[Víctor Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquía Instituto Universitario de Educación Física y Deporte ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>4</volume>
<numero>2</numero>
<fpage>137</fpage>
<lpage>149</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2665-20562022000200137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2665-20562022000200137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2665-20562022000200137&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Problem:  Intensity in endurance training is important for improving race time; its optimal handling in amateur runners has not been extensively studied. The polarized training intensity distribution (TID) model emerges as a possibility to reduce race time; however, effect of this model remains to be demonstrated compared to other TID models.  Objective:  The objective of this study is to explore the current state of the evidence, its the gaps, according to the effect of the polarized TID model on race time in amateur runners compared to other TID models.  Method:  A scoping review without date restrictions was carried out in PubMed, EBSCO, SciELO, LILACS, and Google Scholar. Randomized controlled studies, quasi-experimental studies, and case studies, which comprise polarized TID model in amateur runners on race time, were include.  Results:  Five studies evaluated the effect on running time using the polarized TID model compared to other models in amateur runners; four of them did not show differences between groups in the race times in two, five, and ten km. Only one study showed significant diferences in the race time at 21 km.  Conclusions:  The model with polarized TID did not show significant differences in race time compared to other models, except for a case report in which the polarized TID was higher by 21 km compared to the threshold TID: 1 hour. 20 min. 22 seconds and 1 hour. 26 min. 34s, respectively. The scarce evidence found, the heterogeneity in the distances in the evaluated race time, the distribution of zones in the same TID, the duration of the interventions, and the monitoring of the loads, are the main limitations found in the studies. The polarized TID could contribute to adherence, lower perception of effort, and injury prevention. However, this must be tested in future studies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Problema:  La intensidad en el entrenamiento de la resistencia es importante para mejorar el tiempo de carrera; su manipulación óptima en corredores recreativos no ha sido estudiada ampliamente. El modelo de distribución de intensidad del entrenamiento (DIE) polarizado emerge como posibilidad para reducir el tiempo de carrera. Sin embargo, falta demostrar su efecto comparado con otros modelos de DIE.  Objetivo:  Explorar el estado actual de la evidencia científica y sus vacíos respecto al efecto del modelo de DIE polarizado sobre el tiempo de carrera en corredores recreativos, en comparación con otros modelos de DIE.  Método:  Se realizó una revisión de alcance sin restricción de fechas en PubMed, EBSCO, SciELO, LILACS y Google Scholar. Se incluyeron estudios controlados aleatorios, estudios cuasiexperimentales y estudios de caso, que tuvieran como DIE el modelo polarizado en corredores recreativos sobre el tiempo de carrera.  Resultados:  Cinco estudios evaluaron el efecto en el tiempo de carrera usando el modelo de DIE polarizado comparado con otros modelos en corredores recreativos; cuatro de ellos no mostraron diferencias entre grupos en los tiempos de carrera en dos, cinco y diez km. Solo un estudio mostró diferencias significativas en el tiempo de carrera en 21 km.  Conclusiones:  El modelo con DIE polarizado no mostró diferencias significativas en el tiempo de carrera comparado con otros modelos, a excepción de un reporte de caso en el cual la DIE polarizado fue superior en 21 km comparado la DIE umbral: 1 hora. 20 min. 22 s y 1 hora. 26 min. 34 s, respectivamente. La escasa evidencia encontrada, la heterogeneidad en las distancias en el tiempo de carrera evaluado, la distribución de zonas en una misma DIE, la duración de las intervenciones y la monitorización de las cargas son las principales limitaciones encontradas en los estudios. La DIE polarizado podría contribuir a la adherencia, a una menor percepción del esfuerzo y a la prevención de lesiones. No obstante, esto debe ser probado en estudios futuros.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Training intensity distribution]]></kwd>
<kwd lng="en"><![CDATA[polarized training]]></kwd>
<kwd lng="en"><![CDATA[amateur runners]]></kwd>
<kwd lng="en"><![CDATA[race time]]></kwd>
<kwd lng="en"><![CDATA[distance runners]]></kwd>
<kwd lng="en"><![CDATA[threshold training]]></kwd>
<kwd lng="en"><![CDATA[pyramidal training]]></kwd>
<kwd lng="en"><![CDATA[high-intensity training]]></kwd>
<kwd lng="en"><![CDATA[training zones]]></kwd>
<kwd lng="en"><![CDATA[high volume and low-intensity training]]></kwd>
<kwd lng="en"><![CDATA[endurance training]]></kwd>
<kwd lng="es"><![CDATA[Distribución de intensidades del entrenamiento]]></kwd>
<kwd lng="es"><![CDATA[modelo polarizado]]></kwd>
<kwd lng="es"><![CDATA[corredores recreativos, tiempo de carrera]]></kwd>
<kwd lng="es"><![CDATA[atletismo]]></kwd>
<kwd lng="es"><![CDATA[corredores de fondo]]></kwd>
<kwd lng="es"><![CDATA[modelo umbral]]></kwd>
<kwd lng="es"><![CDATA[modelo piramidal]]></kwd>
<kwd lng="es"><![CDATA[entrenamiento de alta intensidad]]></kwd>
<kwd lng="es"><![CDATA[zonas de entrenamiento]]></kwd>
<kwd lng="es"><![CDATA[alto volumen y baja intensidad]]></kwd>
<kwd lng="es"><![CDATA[entrenamiento de resistencia.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kinderman]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Simon]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Keul]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Developmental changes in carbohydrate moiety of human alpha&#8208;fetoprotein]]></article-title>
<source><![CDATA[Int J Cancer]]></source>
<year>1978</year>
<volume>22</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>515-20</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skinner]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[McLellan]]></surname>
<given-names><![CDATA[TH.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Transition from Aerobic to Anaerobic Metabolism]]></article-title>
<source><![CDATA[Res Q Exerc Sport]]></source>
<year>1980</year>
<volume>51</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>234-48</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hydren]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Bruce]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Current scientific evidence for a polarized cardiovascular endurance training model]]></article-title>
<source><![CDATA[J strength Cond Res]]></source>
<year>2015</year>
<volume>29</volume>
<numero>12</numero>
<issue>12</issue>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seiler]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[What is best practice for training intensity and duration distribution in endurance athletes?]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2010</year>
<volume>5</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>276-91</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Casado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Guimarães]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Sant'Ana]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Leitão]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Training-intensity Distribution on Middle- And Long-distance Runners: A Systematic Review]]></article-title>
<source><![CDATA[Int J Sports Med]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Filipas]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Bonato]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gallo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Codella]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of 16 weeks of pyramidal and polarized training intensity distributions in well-trained endurance runners]]></article-title>
<source><![CDATA[Scand J Med Sci Sport]]></source>
<year>2022</year>
<volume>32</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>498-511</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Festa]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Tarperi]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Skroce]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[La Torre]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Schena]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of Different Training Intensity Distribution in Recreational Runners]]></article-title>
<source><![CDATA[Front Sport Act Living]]></source>
<year>2020</year>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stöggl]]></surname>
<given-names><![CDATA[TL]]></given-names>
</name>
<name>
<surname><![CDATA[Sperlich]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The training intensity distribution among well-trained and elite endurance athletes]]></article-title>
<source><![CDATA[Front Physiol]]></source>
<year>2015</year>
<page-range>295</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Seiler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[España]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Larumbe]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Esteve-Lanao]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Does polarized training improve performance in recreational runners?]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2014</year>
<volume>9</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>265-72</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Röhrken]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Held]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Donath]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Six Weeks of Polarized Versus Moderate Intensity Distribution: A Pilot Intervention Study]]></article-title>
<source><![CDATA[Front Physiol]]></source>
<year>2020</year>
<volume>11</volume>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Treff]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Winkert]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Sareban]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Steinacker]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Sperlich]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The polarization-index: A simple calculation to distinguish polarized from non-polarized training intensity distributions]]></article-title>
<source><![CDATA[Front Physiol]]></source>
<year>2019</year>
<volume>10</volume>
<page-range>1-6</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kenneally]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Casado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Gomez-Ezeiza]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Santos-Concejero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Training intensity distribution analysis by race pace vs. physiological approach in world-class middle- and long-distance runners]]></article-title>
<source><![CDATA[Eur J Sport Sci]]></source>
<year>2021</year>
<volume>21</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>819-26</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kenneally]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Casado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Santos-Concejero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Effect of Periodization and Training Intensity Distribution on Middle- and Long-Distance Running Performance: A Systematic Review]]></article-title>
<source><![CDATA[International Journal of Sports Physiology and Performance]]></source>
<year>2018</year>
<volume>13</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>1114-21</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stöggl]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Sperlich]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polarized training has greater impact on key endurance variables than threshold, high intensity, or high volume training]]></article-title>
<source><![CDATA[Front Physiol]]></source>
<year>2014</year>
<volume>5</volume>
<page-range>1-9</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carnes]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Mahoney]]></surname>
<given-names><![CDATA[SE.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polarized vs. High Intensity Multimodal Training in Recreational Runners]]></article-title>
<source><![CDATA[Int J Sport Physiol Perform J Int J Sport Physiol Perform]]></source>
<year>2018</year>
<page-range>1-28</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zinner]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Schäfer Olstad]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Sperlich]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mesocycles with different training intensity distribution in recreational runners]]></article-title>
<source><![CDATA[Med Sci Sports Exerc]]></source>
<year>2018</year>
<volume>50</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1641-8</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Auersperger]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Jurov]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Laurencak]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Leskosek]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Skof]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of a short-term training period on physiological parameters and running performance in recreationally active female runners]]></article-title>
<source><![CDATA[Sport Mont]]></source>
<year>2020</year>
<volume>18</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>69-74</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Varela-Sanz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Training intensity distribution and performance of a recreational male endurance runner]]></article-title>
<source><![CDATA[J Phys Educ Sport]]></source>
<year>2018</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>2257-63</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos-Campo]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[Freitas]]></surname>
<given-names><![CDATA[TT]]></given-names>
</name>
<name>
<surname><![CDATA[Rubio-Arias]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Marín-Cascales]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Alcaraz]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of two different intensity distribution training programmes on aerobic and body composition variables in ultra-endurance runners]]></article-title>
<source><![CDATA[Eur J Sport Sci]]></source>
<year>2019</year>
<volume>19</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>636-44</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sellés Pérez]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández-Sáez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Cejuela]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Polarized and pyramidal training intensity distribution: Relationship with a half-ironman distance triathlon competition]]></article-title>
<source><![CDATA[J Sport Sci Med]]></source>
<year>2019</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>708-15</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neal]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Hunter]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Brennan]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[O'Sullivan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hamilton]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[DeVito]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Six weeks of a polarized training-intensity distribution leads to greater physiological and performance adaptations than a threshold model in trained cyclists]]></article-title>
<source><![CDATA[J Appl Physiol]]></source>
<year>2013</year>
<volume>114</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>461-71</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Cao]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A quasi-experimental study of Chinese top-level speed skaters' training load: Threshold versus polarized model]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2012</year>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>103-12</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pla]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Le Meur]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Aubry]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Toussaint]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Hellard]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of a 6-week period of polarized or threshold training on performance and fatigue in elite swimmers]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2019</year>
<volume>14</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>183-9</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Foster]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rodriguez-Marroyo]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[De Koning]]></surname>
<given-names><![CDATA[JJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Monitoring training loads: The past, the present, and the future]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2017</year>
<volume>12</volume>
<page-range>2-8</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[González-Mohíno]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[González-Ravé]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Foster]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Training Periodization, Methods, Intensity Distribution, and Volume in Highly Trained and Elite Distance Runners: A Systematic Review]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2022</year>
<volume>17</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>820-33</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Andersen]]></surname>
<given-names><![CDATA[JJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The State of Running 2019]]></article-title>
<source><![CDATA[RunRepeat]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boullosa]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Esteve-Lanao]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Casado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Peyré-Tartaruga]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Gomes da Rosa]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Del Coso]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factors Affecting Training and Physical Performance in Recreational Endurance Runners]]></article-title>
<source><![CDATA[Sports]]></source>
<year>2020</year>
<volume>8</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>35</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Haugen]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Sandbakk]]></surname>
<given-names><![CDATA[Ø]]></given-names>
</name>
<name>
<surname><![CDATA[Seiler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Tønnessen]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Training Characteristics of World-Class Distance Runners: An Integration of Scientific Literature and Results-Proven Practice]]></article-title>
<source><![CDATA[Sport Med - Open]]></source>
<year>2022</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bourgois]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Bourgois]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Boone]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Perspectives and determinants for training-intensity distribution in elite endurance athletes]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2019</year>
<volume>14</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1151-6</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seiler]]></surname>
<given-names><![CDATA[KS]]></given-names>
</name>
<name>
<surname><![CDATA[Kjerland]]></surname>
<given-names><![CDATA[GØ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quantifying training intensity distribution in elite endurance athletes: Is there evidence for an "optimal" distribution?]]></article-title>
<source><![CDATA[Scand J Med Sci Sport]]></source>
<year>2006</year>
<volume>16</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>49-56</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Cejuela]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Seiler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Larumbe]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Esteve-Lanao]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Training-intensity distribution during an ironman season: Relationship with competition performance]]></article-title>
<source><![CDATA[Int J Sports Physiol Perform]]></source>
<year>2014</year>
<volume>9</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>332-9</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arksey]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[O'Malley]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Scoping studies: Towards a methodological framework]]></article-title>
<source><![CDATA[Int J Soc Res Methodol Theory Pract]]></source>
<year>2005</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>19-32</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tricco]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Lillie]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Zarin]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[O'Brien]]></surname>
<given-names><![CDATA[KK]]></given-names>
</name>
<name>
<surname><![CDATA[Colquhoun]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Levac]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[PRISMA extension for scoping reviews (PRISMA-ScR): Checklist and explanation]]></article-title>
<source><![CDATA[Ann Intern Med]]></source>
<year>2018</year>
<volume>169</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>467-73</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvero-Cruz]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Carnero]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[MAG]]></given-names>
</name>
<name>
<surname><![CDATA[Cárceles]]></surname>
<given-names><![CDATA[FA]]></given-names>
</name>
<name>
<surname><![CDATA[Correas-Gómez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Rosemann]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Predictive performance models in long-distance runners: A narrative review]]></article-title>
<source><![CDATA[Int J Environ Res Public Health]]></source>
<year>2020</year>
<volume>17</volume>
<numero>21</numero>
<issue>21</issue>
<page-range>1-22</page-range></nlm-citation>
</ref>
<ref id="B35">
<label>35</label><nlm-citation citation-type="">
<collab>World Athletics</collab>
<article-title xml:lang=""><![CDATA[Reglamento de competición y técnico World Athletics]]></article-title>
<source><![CDATA[]]></source>
<year>2022</year>
<page-range>1-284</page-range></nlm-citation>
</ref>
<ref id="B36">
<label>36</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Borresen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lambert]]></surname>
<given-names><![CDATA[MI.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Quantification of Training Load, Effect on Performance]]></article-title>
<source><![CDATA[Sport Med]]></source>
<year>2009</year>
<volume>39</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>779-95</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
