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    <item>
      <title>Elastische Eigenschaften des Muskel-Sehnen-Komplexes von Langstreckenläufern</title>
      <pubDate>Sat, 01 Jan 2000 13:48:46 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3031051</link>
      <guid>https://sponet.de/sponet/Record/3031051</guid>
      <author>Kubo, K.</author>
      <author>Kanehisa, H.</author>
      <author>Kawakami, Y.</author>
      <author>Fukunaga, T.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Sehne</dc:subject>
      <dc:subject>Bein</dc:subject>
      <dc:subject>Dehnbarkeit</dc:subject>
      <dc:subject>Energiestoffwechsel</dc:subject>
      <dc:subject>Ausdauer</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Kubo, K.</dc:creator>
      <dc:creator>Kanehisa, H.</dc:creator>
      <dc:creator>Kawakami, Y.</dc:creator>
      <dc:creator>Fukunaga, T.</dc:creator>
      <content:encoded><![CDATA[Ziel war die Untersuchung  der elastischen Eigenschaften des Muskel-Sehnen-Komplxees (MTC) der Kniestrecker und der Kapazität für die elastische Energieverwertung bei Langstreckenläufern durch Vergleich mit Untrainierten. Es wird festgestellt, daß bei Langstreckenläufern der MTC des m. vastis lateralis weniger dehnbar  und sein Energiespeichervermögen während MTS-Verlängerung niedriger als bei Untrainierten ist.  Diese elastischen Profile des m. vastis lateralis bei Langstreckenläufern können mit ihrer niedrigeren Leistung bei Sprüngen mit Ausholbewegungen (counter-movement jumps) in Verbindung stehen.]]></content:encoded>
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    <item>
      <title>Elastische Eigenschaften des Muskel-Sehnen-Komplexes bei Langstreckenläufern</title>
      <pubDate>Sat, 01 Jan 2000 13:48:46 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4001928</link>
      <guid>https://sponet.de/sponet/Record/4001928</guid>
      <author>Kubo, K.</author>
      <author>Kanehisa, H.</author>
      <author>Kawakami, Y.</author>
      <author>Fukunaga, T.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Sehne</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Energiestoffwechsel</dc:subject>
      <dc:subject>Bewegungsapparat</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Kubo, K.</dc:creator>
      <dc:creator>Kanehisa, H.</dc:creator>
      <dc:creator>Kawakami, Y.</dc:creator>
      <dc:creator>Fukunaga, T.</dc:creator>
      <content:encoded><![CDATA[The purpose of this study was to investigate the elastic properties of muscle-tendon complex (MTC) in knee extensor muscles and the capacity for elastic energy utilization in long-distance runners (LDR) by comparing with data obtained from untrained individuals (CON). The elongation (L) of the tendon and aponeurosis of vastus lateralis muscle during isometric knee extension was determined by real-time brightness mode ultrasonography, while the subjects developed a gradually increasing torque from 0 (relaxed) to maximal effort (MVC) within 7 s. In addition, performances in two kinds of maximal vertical jumps, i.e. squatting (SJ) and counter-movement jumps (CMJ), were measured. The relationship between L muscle and force (Fv) was curvilinear and consisted of an initial region (toe region), characterized by a large increase in L with increasing F, immediately followed by a linear region. The slope of the regression equation for the L-F relationship in the range 50%-100% of MVC was defined as an index of MTC compliance, where the rate of the changes in L to that in muscle F at every 10% of MVC became almost constant. The maximal L (Lmax) and MTC compliance were significantly lower in LDR than in CON: 29.9 (SD 3.9) mm in LDR compared to 33.3 (SD 5.5) mm in CON for Lmax and 1.55 (SD 0.25) 2 10m2 mm · Nm1 in LDR compared to 1.88 (SD 0.82) 2 10m2 mm · Nm1 in CON for MTC compliance. Also, LDR showed significantly less elastic energy absorption (Ee) than CON, defined as the area below the L-F relationship curve from 0 to 100% of MVC. Not only jump heights but also the differences between the heights in SJ and CMJ, expressed as the percentage of the height in SJ, were significantly lower in LDR than in CON. The augmentation with counter-movement was significantly correlated to either MTC compliance (r = 0.554, P < 0.05) or Ee (r = 0.563, P < 0.05). Thus, the present results would indicate that MTC of vastus lateralis muscle is less compliant and its potential for energy storage during MTS lengthening is lower in LDR than untrained individuals. These elastic profiles of vastus lateralis muscle in LDR may be associated with their lower performances during CMJ.]]></content:encoded>
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