<?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>1659-097X</journal-id>
<journal-title><![CDATA[MHSalud]]></journal-title>
<abbrev-journal-title><![CDATA[MHSalud]]></abbrev-journal-title>
<issn>1659-097X</issn>
<publisher>
<publisher-name><![CDATA[Escuela de Ciencias del Movimiento Humano y Calidad de Vida, Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-097X2025000200170</article-id>
<article-id pub-id-type="doi">10.15359/mhs.22-2.20578</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The effect of preseason sport camp on strength and speed abilities in youth swimmers]]></article-title>
<article-title xml:lang="es"><![CDATA[El efecto del campamento deportivo de pretemporada en las capacidades de fuerza y velocidad de los nadadores juveniles]]></article-title>
<article-title xml:lang="pt"><![CDATA[O efeito do acampamento esportivo de pré-temporada nas habilidades de força e velocidade em nadadores jovens]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bielec]]></surname>
<given-names><![CDATA[Grzegorz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jurak]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rejman]]></surname>
<given-names><![CDATA[Marek]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Gdansk University of Physical Education and Sport Faculty of Physical Culture ]]></institution>
<addr-line><![CDATA[Gdansk ]]></addr-line>
<country>Polonia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Center for Mental Health Rehabilitation  ]]></institution>
<addr-line><![CDATA[Beroun ]]></addr-line>
<country>República Checa</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Wroclaw University of Health and Sport Sciences Faculty of Physical Education and Sport ]]></institution>
<addr-line><![CDATA[Wroclaw ]]></addr-line>
<country>Polonia</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>22</volume>
<numero>2</numero>
<fpage>170</fpage>
<lpage>190</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-097X2025000200170&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-097X2025000200170&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-097X2025000200170&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Regular assessment of anthropometric variables and motor fitness of young athletes is an integral part of the training process. However, the physiological effects of seasonal sport camps on youth athletes have not been investigated thoroughly.  Objective:  The aim of the current study is to assess the changes in strength and speed performance in youth swimmers resulting from a short-term preseason camp.  Methods:  Eleven swimmers aged 13-14 years participated in an 8-day camp. The camp programme included nine training sessions in the swimming pool, five general fitness training sessions in the athletics stadium, and two strength circuit training sessions. Participants were interviewed to determine the amount of physical activity undertaken in summer vacation. Fitness tests were conducted on the 1st day and were repeated on the 8th day of camp. Participants performed the following motor tests: a 50-m dash, bent-arm hang, a handgrip test, and a 100-m front crawl trial.  Results:  Participants improved their swimming speed (p&lt;0.001) but worsened their handgrip strength (p=0.04). No significant changes were noted in the results of the 50-m dash test (p=0.90) and the bent-arm hang test (p=0.30). Anthropometric variables were not correlated substantially with any result of motor performance. Participation in physical activity during summer break was negatively correlated with swimming performance (r=-0.66; p&lt;0.05) and positively correlated with handgrip strength (r=0.70; p&lt;0.05).  Conclusions:  Improvement in swimming speed was the most important outcome of the preseason camp for youth athletes. Endurance oriented training loads may have caused the lack in improvement of muscular strength. The amount of physical activity undertaken during summer vacation had an impact on motor performance in age-group swimmers.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  La evaluación periódica de las variables antropométricas y de la aptitud motriz de los jóvenes atletas forma parte integral del proceso de entrenamiento. Sin embargo, no se han investigado a fondo los efectos fisiológicos de los campamentos deportivos estacionales en los atletas jóvenes.  Objetivo:  evaluar los cambios en el rendimiento de fuerza y velocidad en nadadores juveniles resultantes de un campamento de pretemporada de corta duración.  Métodos:  Once nadadores de 13-14 años participaron en un campamento de ocho días. El programa incluía nueve sesiones de entrenamiento en la piscina, cinco de físico general en el estadio de atletismo y dos de fuerza en circuito. Se entrevistó a los participantes para determinar la cantidad de actividad física realizada en las vacaciones de verano. Se realizaron pruebas de aptitud física el primer día y se repitieron el octavo día del campamento. Los participantes realizaron las siguientes pruebas motrices: carrera de 50 metros lisos, suspensión de brazos flexionados, prueba de agarre de manos y prueba de 100 metros de crol frontal.  Resultados:  Los participantes mejoraron su velocidad de nado (p&lt;0.001), pero empeoraron su fuerza de agarre (p=0.04). No se observaron cambios significativos en los resultados de la prueba de 50 metros lisos (p=0.90) y la prueba de suspensión con brazos flexionados (p=0.30). Las variables antropométricas no se correlacionaron sustancialmente con ningún resultado del rendimiento motor. La participación en actividades físicas durante las vacaciones de verano se correlacionó negativamente con el rendimiento en natación (r=0.66; p&lt;0.05) y positivamente con la fuerza de agarre (r=0.70; p&lt;0.05).  Conclusiones:  La mejora en la velocidad de nado fue el resultado más importante del campamento de pretemporada para los atletas juveniles. Las cargas de entrenamiento orientadas a la resistencia pueden haber causado la falta de mejora de la fuerza muscular. La cantidad de actividad física realizada durante las vacaciones de verano influyó en el rendimiento motor de los nadadores juveniles.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Introdução:  A avaliação regular das variáveis antropométricas e da aptidão motora de jovens atletas é uma parte integrante do processo de treinamento. No entanto, os efeitos fisiológicos dos acampamentos esportivos sazonais em atletas jovens ainda não foram investigados de forma aprofundada.  Objetivo:  Avaliar as mudanças no desempenho de força e velocidade em nadadores jovens resultantes de um acampamento de pré-temporada de curta duração.  Métodos:  Onze nadadores com idades entre 13 e 14 anos participaram de um acampamento de 8 dias. O programa do acampamento incluiu nove sessões de treinamento na piscina, cinco sessões de condicionamento físico geral no estádio de atletismo e duas sessões de treinamento em circuito de força. Os participantes foram entrevistados para determinar a quantidade de atividade física realizada durante as férias de verão. Os testes de aptidão física foram realizados no primeiro e no oitavo dia do acampamento. Os participantes realizaram os seguintes testes motores: corrida de 50 m, suspensão com os braços flexionados, teste de preensão manual e prova de nado crawl de 100 m.  Resultados:  Os participantes melhoraram sua velocidade de nado (p&lt;0,001), mas apresentaram piora na força de preensão manual (p=0,04). Não foram observadas mudanças significativas nos resultados do teste de corrida de 50 m (p=0,90) e no teste de suspensão com os braços flexionados (p=0,30). As variáveis antropométricas não apresentaram correlação substancial com nenhum resultado de desempenho motor. A participação em atividades físicas durante as férias de verão apresentou correlação negativa com o desempenho na natação (r=-0,66; p&lt;0,05) e correlação positiva com a força de preensão manual (r=0,70; p&lt;0,05).  Conclusões:  A melhora na velocidade de nado foi o resultado mais importante do acampamento de pré-temporada para jovens atletas. As cargas de treinamento voltadas à resistência podem ter contribuído para a ausência de melhora na força muscular. A quantidade de atividade física realizada durante as férias de verão teve impacto no desempenho motor de nadadores jovens por faixa etária.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[swimming]]></kwd>
<kwd lng="en"><![CDATA[youth]]></kwd>
<kwd lng="en"><![CDATA[training]]></kwd>
<kwd lng="en"><![CDATA[muscle strength]]></kwd>
<kwd lng="en"><![CDATA[speed]]></kwd>
<kwd lng="es"><![CDATA[natación]]></kwd>
<kwd lng="es"><![CDATA[jóvenes]]></kwd>
<kwd lng="es"><![CDATA[entrenamiento]]></kwd>
<kwd lng="es"><![CDATA[fuerza muscular]]></kwd>
<kwd lng="es"><![CDATA[velocidad]]></kwd>
<kwd lng="pt"><![CDATA[natação]]></kwd>
<kwd lng="pt"><![CDATA[juventude]]></kwd>
<kwd lng="pt"><![CDATA[treinamento]]></kwd>
<kwd lng="pt"><![CDATA[força muscular]]></kwd>
<kwd lng="pt"><![CDATA[velocidade]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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