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    <title>Ergebnis für Versionen - 4002410</title>
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    <item>
      <title>Kreatin und seine Anwendung als ergogenes Mittel</title>
      <pubDate>Sun, 01 Jan 1995 22:32:35 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4002410</link>
      <guid>https://sponet.de/sponet/Record/4002410</guid>
      <author>Greenhaff, P. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Supplementierung</dc:subject>
      <dc:subject>Stoffwechsel</dc:subject>
      <dc:subject>Schnellkraft</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Kreatin</dc:subject>
      <dc:subject>ergogenes Mittel</dc:subject>
      <dc:subject>Ausdauer</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Greenhaff, P. L.</dc:creator>
      <content:encoded><![CDATA[Phosphocreatine (PCr) availability is likely lo limit performance in brief, high-power exercise because the depletion of PCr results in an inability to maintain adenosine triphosphate (ATP) resynthesis al the rate required. It is now known that the daily ingestion of four 5 gram doses of creatine for 5 days will significantly increase intramuscular and PCr concentrations prior to exercise and will facilitate PCr resynthesis during recovery from exercise, particularly in those individuals with relatively low creatine concentrations prior to feeding. As a consequence of creatine ingestion work output during repeated bouts of high-power exercise has been increased under a variety of experimental conditions. The reduced accumulation of ammonia and hypoxanthine in plasma and the attenuation of muscle ATP degradation after creatine feeding suggest that the ergogenic effect of creatine is achieved by better maintaining ATP turnover during contraction. (Greenhaff reviews the role of cr eatine in muscle energy metabolism and fatigue, the effect of creatine ingestion on muscle creatine concentration, practical applications, and concludes with the following:)  In conclusion, research concerned with the effects of creatine ingestion on muschle function and metabolism during exercise in healthy normal individuals and in disease states is in its infancy but is sure to progress rapidly.  Recent findings indicate that it is important ot optimize tissue creatine uptake in order to     maximize performance benefits.  Creatine should not be viewed as another gimmick supplement:  its ingestion is a means of providing   immediate, significant performance improvements to athletes involved in explosive sports.  In the long run, creatine may also allow athletes to train without fatigue at an intensity higher than that to which they are accustomed.  For these reasons alone, creatine supplementation could be viewed as a significant development in sport nutrition.]]></content:encoded>
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    <item>
      <title>Kreatin und seine Verwendung als ein ergogenes Mittel</title>
      <pubDate>Sun, 01 Jan 1995 22:32:35 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3025496</link>
      <guid>https://sponet.de/sponet/Record/3025496</guid>
      <author>Greenhaff, P. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Biochemie</dc:subject>
      <dc:subject>Ernährung</dc:subject>
      <dc:subject>Kreatin</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Greenhaff, P. L.</dc:creator>
      <content:encoded><![CDATA[Die Verfügbarkeit von Kreatinphosphat (PCr) begrenz wahrscheinlich die Leistung bei kurzer,  schnellkräftiger Belastung, da der Abbau von PCr bewirkt, daß die ATP-Resynthese nicht auf dem erforderlichen Niveau gehalten werden kann. Die tägliche Aufnahme von viermal 5g Kreatin über 5 Tage erhöht signifikant die Kreatin- und Kreatinphosphatspiegel im Muskel vor Belastung  und erleichtert die PCr-Resynthese während der Wiederherstellung insbesondere bei Personen mit relativ niedrigem Kreatinspiegel vor der Supplementierung. Als Folge der Kreatinaufnahme erhöht sich die Arbeitsleistung während wiederholter, schnellkräftiger Belastung. Die verminderte Akkumulation von Ammoniak und Hypoxanthin im Plasma und die Verminderung des Abbaus von ATP im  Muskel nach Kreatinzufuhr weisen darauf hin, daß der ergogene Effekt von Kreatin durch besseres Aufrechterhalten des ATP-Umsatzes während Kontraktion erreicht wird.]]></content:encoded>
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