<?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>2954-3835</journal-id>
<journal-title><![CDATA[Cardiovascular and metabolic science]]></journal-title>
<abbrev-journal-title><![CDATA[Cardiovasc. metab. sci]]></abbrev-journal-title>
<issn>2954-3835</issn>
<publisher>
<publisher-name><![CDATA[Asociación Nacional de Cardiólogos de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2954-38352024000300099</article-id>
<article-id pub-id-type="doi">10.35366/117827</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Correlation of the break point of the double product and the ventilatory thresholds]]></article-title>
<article-title xml:lang="es"><![CDATA[Correlación del punto de quiebre del doble producto y los umbrales ventilatorios]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lara-Vargas]]></surname>
<given-names><![CDATA[Jorge A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reza-Orozco]]></surname>
<given-names><![CDATA[Marco A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pineda-Juárez]]></surname>
<given-names><![CDATA[José A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salgado-Solorio]]></surname>
<given-names><![CDATA[Catalina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Citalán-Jiménez]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leyva-Valadez]]></surname>
<given-names><![CDATA[Eduardo A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arteaga-Martínez]]></surname>
<given-names><![CDATA[Rodolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávalos-Ríos]]></surname>
<given-names><![CDATA[Javier Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad La Salle Facultad de Medicina Servicio de Rehabilitación Cardiaca]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado Centro Médico Nacional 20 de Noviembre Departamento de Investigación Clínica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<volume>35</volume>
<numero>3</numero>
<fpage>99</fpage>
<lpage>105</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2954-38352024000300099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2954-38352024000300099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2954-38352024000300099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  during physical exercise with incremental load, the double product is increased by sympathetic stimulus, and its increase presents a positive inflection called the double product breaking point or break point of double product (BPDP). Commonly, there is a correlation between this and the lactic threshold (LT), but we do not know its association with the ventilatory thresholds that are usually used to prescribe training.  Objective:  to determine the correlation of the BPDP with the ventilatory thresholds.  Material and methods:  a descriptive, prospective, analytical, non-randomized study was carried out in which patients with heart disease who underwent maximal cardiopulmonary exercise tests were included. The PD was obtained and plotted as a function of time (every minute) to establish the BPDP by line drawing. The correlation was made with the ventilatory thresholds obtained from the CPET gas analysis using the ventilatory equivalents method.  Results:  twenty-one patients between 49 and 59 years old (14.3% women) were studied. The Spearman correlation coefficient was applied, and it was found that there is a strong-moderate positive correlation between BPDP and VAT-DP with statistical significance (p = 0.004, r = 0.60) and in the same way between BPDP and moderate correlation with VT2-DP (p = 0.005, r = 0.59).  Conclusion:  determination of PD is a reproducible and easily accessible method for determining ventilatory thresholds. The BPDP correlates with the aerobic-anaerobic ventilatory threshold (VAT), determining training intensity in patients with heart disease.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  durante el ejercicio físico en carga incremental se eleva el doble producto por estímulo simpático y su incremento presenta una inflexión positiva denominada punto de quiebre del doble producto (PQDP). Comúnmente existe una correlación entre éste y el umbral láctico (UL), pero desconocemos su asociación con los umbrales ventilatorios que suelen emplearse para la prescripción del entrenamiento.  Objetivo:  determinar la correlación del PQDP con los umbrales ventilatorios.  Material y métodos:  estudio descriptivo, prospectivo, analítico, no aleatorizado, se incluyeron pacientes con cardiopatía que realizaron prueba máxima de ejercicio cardiopulmonar. Se obtuvo el DP y se graficó en función del tiempo (cada minuto) para establecer mediante trazado de rectas el PQDP. Se hizo la correlación con los umbrales ventilatorios obtenidos del análisis de gases del CPET, por método de los equivalentes ventilatorios.  Resultados:  se estudiaron 21 pacientes entre 49 y 59 años (14.3% mujeres). Se aplicó el coeficiente de correlación de Spearman y se encontró que existe una fuerte-moderada correlación positiva entre el PQDP y el VAT-DP con significancia estadística (p = 0.004, r = 0.60) y de la misma manera entre PQDP y correlación moderada con VT2-DP (p = 0.005, r = 0.59).  Conclusión:  la determinación del DP es un método reproducible y de fácil acceso para determinación de umbrales ventilatorios. El PQDP correlaciona con el umbral ventilatorio aeróbico-anaeróbico (VAT), por lo que puede ser utilizado para determinar la intensidad en el entrenamiento de los pacientes con cardiopatías.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[double product]]></kwd>
<kwd lng="en"><![CDATA[cardiopulmonary exercise test]]></kwd>
<kwd lng="en"><![CDATA[double product break point]]></kwd>
<kwd lng="en"><![CDATA[ventilatory thresholds]]></kwd>
<kwd lng="es"><![CDATA[doble producto]]></kwd>
<kwd lng="es"><![CDATA[prueba de ejercicio cardiopulmonar]]></kwd>
<kwd lng="es"><![CDATA[punto de quiebre del doble producto]]></kwd>
<kwd lng="es"><![CDATA[umbrales ventilatorios]]></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[Braunwald]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Control of myocardial oxygen consumption]]></article-title>
<source><![CDATA[Am J Cardiol]]></source>
<year>1971</year>
<volume>27</volume>
<page-range>416-32</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[Brubaker]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Kitzman]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chronotropic incompetence: causes, consequences and management]]></article-title>
<source><![CDATA[Circulation]]></source>
<year>2011</year>
<volume>123</volume>
<page-range>1010-20</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McArdle]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Katch]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Katch]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<source><![CDATA[Exercise physiology]]></source>
<year>1996</year>
<edition>4th</edition>
<publisher-name><![CDATA[Williams &amp; Wilkins Editorial]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mazzeo]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[Marshall]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of plasma catecholamines on the lactate threshold during graded exercise]]></article-title>
<source><![CDATA[J Appl Physiol 1985]]></source>
<year>1989</year>
<volume>67</volume>
<page-range>1319-22</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[SchneiderD, McLellan]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Gass]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Plasma catecholamine and blood lactate responses to incremental arm and leg exercise]]></article-title>
<source><![CDATA[Med Sci Sports Exerc]]></source>
<year>2000</year>
<volume>32</volume>
<page-range>608-13</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tanaka]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Kiyonaga]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kagimura]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relationship between lactate threshold and double product break point during graded exercise test]]></article-title>
<source><![CDATA[Kokyu To Junkan]]></source>
<year>1995</year>
<volume>43</volume>
<page-range>495-9</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[Wasserman]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinants and detection of anaerobic threshold and consequences of exercise above it]]></article-title>
<source><![CDATA[Circulation]]></source>
<year>1987</year>
<volume>76</volume>
<page-range>VI29-39</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Weltman]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[The blood lactate response to exercise. Monograph number 4]]></source>
<year>1995</year>
<publisher-name><![CDATA[Human Kinetics Eds]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sales]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Campbell]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
<name>
<surname><![CDATA[Morais]]></surname>
<given-names><![CDATA[PK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Noninvasive method to estimate anaerobic threshold in individuals with type 2 diabetes]]></article-title>
<source><![CDATA[Diabetol Metab Syndr]]></source>
<year>2011</year>
<volume>3</volume>
<page-range>1</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[Simoes]]></surname>
<given-names><![CDATA[HG]]></given-names>
</name>
<name>
<surname><![CDATA[Campbell]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
<name>
<surname><![CDATA[Kushnick]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Blood glucose threshold and the metabolic responses to incremental exercise tests with and without prior lactic acidosis induction]]></article-title>
<source><![CDATA[Eur J Appl Physiol]]></source>
<year>2003</year>
<volume>89</volume>
<page-range>603-11</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[Whipp]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physiological mechanisms dissociating pulmonary CO2 and O2 exchange dynamics during exercise in humans]]></article-title>
<source><![CDATA[Exp Physiol]]></source>
<year>2007</year>
<volume>92</volume>
<page-range>347-55</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[Brubaker]]></surname>
<given-names><![CDATA[PH]]></given-names>
</name>
<name>
<surname><![CDATA[Kiyonaga]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Matrazzo]]></surname>
<given-names><![CDATA[BA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Identification of the anaerobic threshold using double product in patients with coronary artery disease]]></article-title>
<source><![CDATA[Am J Cardiol]]></source>
<year>1997</year>
<volume>79</volume>
<page-range>360-2</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[Riley]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Maehara]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Pórszász]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Association between the anaerobic threshold and the break-point in the double product/work rate relationship]]></article-title>
<source><![CDATA[Eur J Appl Physiol Occup Physiol]]></source>
<year>1997</year>
<volume>75</volume>
<page-range>14-21</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[Tanaka]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Kiyonaga]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Terao]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Double product response is accelerated above the blood lactate threshold]]></article-title>
<source><![CDATA[Med Sci Sports Exerc]]></source>
<year>1997</year>
<volume>29</volume>
<page-range>503-8</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[Omiya]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Itoh]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Harada]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relationship between double product break point, lactate threshold, and ventilatory threshold in cardiac patients]]></article-title>
<source><![CDATA[Eur J Appl Physiol]]></source>
<year>2004</year>
<volume>91</volume>
<page-range>224-9</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[Hargens]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
<name>
<surname><![CDATA[Griffin]]></surname>
<given-names><![CDATA[DC]]></given-names>
</name>
<name>
<surname><![CDATA[Kaminsky]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The influence of aerobic exercise training on the double product break point in low-to-moderate risk adults]]></article-title>
<source><![CDATA[Eur J Appl Physiol]]></source>
<year>2011</year>
<volume>111</volume>
<page-range>313--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[Ohtsuki]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Watanabe]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of incremental load of circulatory response on double product break point detection]]></article-title>
<source><![CDATA[J Phys Ther Sci-]]></source>
<year>2007</year>
<volume>19</volume>
<page-range>293-8</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[Ohtsuki]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Watanabe]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The product-break-point derived from measurements with a digital automatic sphygmomanometer]]></article-title>
<source><![CDATA[J Phys Ther Sci]]></source>
<year>2008</year>
<volume>20</volume>
<page-range>1-5</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[Skinner]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[McLellan]]></surname>
<given-names><![CDATA[TM]]></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="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[NM]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[LN]]></given-names>
</name>
<name>
<surname><![CDATA[Tucher]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relacao entre o limiar de lactato e o break point do duplo produto em jogadores de futebol]]></article-title>
<source><![CDATA[Bra J Biomotricity]]></source>
<year>2011</year>
<volume>5</volume>
<page-range>9</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[Pérez]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Lachitiello]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Identification of the double product break point in patients with chronic heart failure]]></article-title>
<source><![CDATA[J Cardiopulmonary Rehab]]></source>
<year>1999</year>
<volume>19</volume>
<page-range>288</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[Resnik]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[De Roia]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Lobo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Double product breakpoint as an indicator of metabolic transition during exercise in coronary patients]]></article-title>
<source><![CDATA[Insuf Card]]></source>
<year>2016</year>
<volume>11</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>160-7</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[Victor de Sousa]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Sales]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Aguiar Sda]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Double product break point estimates ventilatory threshold in individuals with type 2 diabetes]]></article-title>
<source><![CDATA[J Phys Ther Sci]]></source>
<year>2016</year>
<volume>28</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1775-80</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[Akizuki]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Yasaki]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Echizenya]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Ohashi]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anaerobic threshold and salivary a amylase during incremental exercise]]></article-title>
<source><![CDATA[J Phys Ther Sci]]></source>
<year>2014</year>
<volume>26</volume>
<page-range>1059-63</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[Agostoni]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Piepoli]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prognostic value of indeterminable anaerobic threshold in heart failure]]></article-title>
<source><![CDATA[Circ Heart Fail]]></source>
<year>2013</year>
<volume>6</volume>
<page-range>977-87</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[Coyle]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Integration of the physiological factors determining endurance performance ability]]></article-title>
<source><![CDATA[Exe and Sports Sci Rev]]></source>
<year>1995</year>
<volume>23</volume>
<page-range>25-63</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
