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    <item>
      <title>Energiegesetze und sportliche Leistung</title>
      <pubDate>Fri, 01 Jan 1999 05:18:58 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4002304</link>
      <guid>https://sponet.de/sponet/Record/4002304</guid>
      <author>Katz, J. S.</author>
      <author>Katz, L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Formel</dc:subject>
      <dc:subject>Kurzstreckenlauf</dc:subject>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Lauf</dc:subject>
      <dc:subject>Leichtathletik</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Mittelstreckenlauf</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Katz, J. S.</dc:creator>
      <dc:creator>Katz, L.</dc:creator>
      <content:encoded><![CDATA[In a previous study,we showed that the 1992 men's world record running times in the 100 m to 200 km could be represented accurately by the equation T= cDn, where T is the calculated record time for distance D, and c and n are positive constants. Here, we extend that to cover the years 1925-65 at 10-year intervals and 1970-95 in 5-year intervals for distances of 100 m to 10 km. Values of n for all years lie along a straight line with a small negative slope. A regression analysis yields an equation for values of n covering the period 1925-95. Values of c from 1925 to 1995 were fitted by a quadratic equation. hese two equations define a surface in three-dimensional space log(T),  log(D), date for all men's world record runs over the 70-year period for distances of 100 m to 10 km. We also demonstrated previously that event times, t, do not scatter randomly with respect to the values of T but form a consistent pattern about the straight lines in log(T) versus log(D) plots. In this study, we show that the pattern of (t-T)/t as a function of date has remained constant for the past 70 years.]]></content:encoded>
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      <title>Energiegesetze und sportliche Leistung</title>
      <pubDate>Fri, 01 Jan 1999 05:18:58 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3030205</link>
      <guid>https://sponet.de/sponet/Record/3030205</guid>
      <author>Katz, J. S.</author>
      <author>Katz, L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Lauf</dc:subject>
      <dc:subject>Kurzstreckenlauf</dc:subject>
      <dc:subject>Mittelstreckenlauf</dc:subject>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Energie</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Zeit</dc:subject>
      <dc:subject>Sportgeschichte</dc:subject>
      <dc:subject>Mathematik</dc:subject>
      <dc:subject>Formel</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Katz, J. S.</dc:creator>
      <dc:creator>Katz, L.</dc:creator>
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