<?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>1981-4690</journal-id>
<journal-title><![CDATA[Revista Brasileira de Educação Física e Esporte]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Bras. Educ. Fís. Esporte]]></abbrev-journal-title>
<issn>1981-4690</issn>
<publisher>
<publisher-name><![CDATA[Escola de Educação Física e Esporte da Universidade de São Paulo  ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1981-46902011000400004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The influence of running shoes cumulative usage on the ground reaction forces and plantar pressure responses]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bianco]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azevedo]]></surname>
<given-names><![CDATA[Ana Paula da Silva]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fraga]]></surname>
<given-names><![CDATA[Carina Helena Wasem]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acquesta]]></surname>
<given-names><![CDATA[Fernanda Michelone]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mochizuki]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amadio]]></surname>
<given-names><![CDATA[Alberto Carlos]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrão]]></surname>
<given-names><![CDATA[Júlio Cerca]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A04">
<institution><![CDATA[,Universidade de São Paulo  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<volume>25</volume>
<numero>04</numero>
<fpage>583</fpage>
<lpage>591</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_arttext&amp;pid=S1981-46902011000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_abstract&amp;pid=S1981-46902011000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_pdf&amp;pid=S1981-46902011000400004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The prolonged use of a running shoe is thought to affect the efficiency of its impact attenuation properties. However, its effect over biomechanical variables has yet not been well understood. The aim of this study was to examine the influence of running shoe usage on ground reaction force and plantar pressure parameters. Three male runners received four running shoes each to use at their training sessions. The Gaitway System was used to register the vertical component of the ground reaction force, whereas the contact area and peak plantar pressure at different regions of the foot were assessed via the F-scan System. Data collection occurred at baseline (when the shoes were new - New) and after 100, 200 and 300km of use. The first peak decreased significantly from New to 300km (p &#8804; 0.01) and the loading rate showed a significant decrease at 200km in relation to the New condition (p &#8804; 0.01). Total area increased significantly from New to 100km (p &#8804; 0.01) of use and maintained a similar value when compared with the other conditions. There was a continuous and significant decrease (p &#8804; 0.01) on forefoot peak pressure as the mileage increased from New to 300km. The hallux peak pressure values were significantly smaller (p &#8804; 0.01) at 300km when compared with the New condition. Considering that the first peak, loading rate and plantar peak pressure values did not increase and that the plantar total contact area increased, it can be concluded that the running shoe did not suffer consistent alterations in ground reaction force and in plantar pressure after 300km of use.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Acredita-se que a eficiência do calçado seja afetada pelo uso prolongado, mas as alterações biomecânicas ainda não estão bem compreendidas. O objetivo deste estudo é analisar a influência do uso de calçados de corrida na força de reação do solo e os parâmetros de pressão plantar. Três corredores do sexo masculino receberam quatro calçados de corrida para usarem em suas sessões de treinamento. O Sistema Gaitway e o Sistema de F-scan foram usados para registrar a força de reação do solo e parâmetros pressão plantar em diferentes regiões do pé. As coletas ocorreram em quatro momentos: novo e 100, 200 e 300 km de uso. O primeiro pico diminuiu da condição novo para os 300 km de uso (p &#8804; 0,01). A taxa de crescimento 1 diminuiu aos 200 km em relação às condições novas (p &#8804; 0,01). A área total aumentou aos 100 km (p &#8804; 0,01) de uso e manteve valores semelhantes e mais altos até 300km. No pico de pressão antepé, houve uma diminuição progressiva (p &#8804; 0,01) como o aumento quilometragem e os valores de pico de pressão do hálux foram significativamente menores (p &#8804; 0,01) aos 300 km do que na condição novo. Como o primeiro pico, a taxa de crecimento 1 e os picos de pressão plantar não aumentaram e a área de contato plantar total aumentou. Conclui-se que o calçado de corrida não sofreu alterações consistentes na força de reação do solo e na pressão plantar após 300 km de uso.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Biomechanics]]></kwd>
<kwd lng="en"><![CDATA[Footwear]]></kwd>
<kwd lng="en"><![CDATA[Cumulative Use]]></kwd>
<kwd lng="pt"><![CDATA[Biomecânica]]></kwd>
<kwd lng="pt"><![CDATA[Calçado]]></kwd>
<kwd lng="pt"><![CDATA[Uso Cumulativo]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font face="Arial, Helvetica, sans-serif"> <h2>The influence of running shoes cumulative usage on the  ground reaction forces and plantar pressure responses.</h2> <h3>A  influ&ecirc;ncia do uso acumulado de cal&ccedil;ados de corrida sobre a for&ccedil;a de rea&ccedil;&atilde;o do  solo e as respostas de press&atilde;o plantar.</h3>     <p>&nbsp;</p> <h4>Roberto  Bianco, Ana Paula da Silva Azevedo, Carina Helena Wasem Fraga, Fernanda  Michelone Acquesta, Luis Mochizuki, Alberto Carlos Amadio, J&uacute;lio Cerca Serr&atilde;o</h4> </font>      ]]></body>
</article>
