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    <item>
      <title>Nach einer Widerstandstrainingseinheit ist die Laufökonomie beeinträchtigt</title>
      <pubDate>Mon, 01 Jan 2001 23:55:18 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3034438</link>
      <guid>https://sponet.de/sponet/Record/3034438</guid>
      <author>Palmer, C. D.</author>
      <author>Sleivert, G. G.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Ausdauer</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Ökonomie</dc:subject>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Trainingseinheit</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Palmer, C. D.</dc:creator>
      <dc:creator>Sleivert, G. G.</dc:creator>
      <content:encoded><![CDATA[Zielstellung:
Untersuchung, ob eine hochintensive Widerstandstrainingseinheit mit niedrigem Umfang die Laufökonomie während eines folgenden aeroben Laufbandlaufs  beeinflusst.
Methoden/Probanden:
Neun Langstreckenläufer , 20+/-1,1 Jahre, VO2max 66,6+/-10,2 ml/kg/min) mit Erfahrung im Widerstandstraining absolvierten Laufbandläufe bei zwei verschiedenen Geschwindigkeiten (0,56 m/sec; 0,20 m/sec) entweder erholt oder 1,8 oder 24 Stunden nach einer Widerstandstrainingseinheit über 50 min.
Untersucht wuren Laufökonomie, Herzfrequnz und Kontraktionseigenschaften des quadriceps femoris.
Ergebnisse:
Der submaximale Sauerstoffverbrauch  war eine Stunde und acht Stunden nach dem Widerstandstraining signifikant erhöht, jedoch nicht nach 24 Stunden. Keine signifikanten Unterschiede bestanden in der Belastungsherzfrequenz, Ventilation, im respiratorischen Koeffizient, in der Höhe der empfundenen Belastung oder Laufmechanik. Das maximale Zuckmoment, die Zeit bis zum maximalem Moment und die halbe Erholungszeit des quadiceps femoris waren unmittelbar  nach dem Widerstandstraining signifikant vermindert. Das maximale Zuckmoment war eine Stunde nach dem Widerstandstraining auch niedriger.
Es wurde geschlussfolgert, dass die Laufökonomie nach einem Widerstandstraining bis zu 8 Stunden beeinträchtigt ist.]]></content:encoded>
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    <item>
      <title>Beeinträchtigte Laufökonomie nach einer Widerstandstrainingseinheit</title>
      <pubDate>Mon, 01 Jan 2001 23:55:18 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4006904</link>
      <guid>https://sponet.de/sponet/Record/4006904</guid>
      <author>Palmer, C. D.</author>
      <author>Sleivert, G. G.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Ausdauer</dc:subject>
      <dc:subject>Ermüdung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Langstreckenlauf</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Palmer, C. D.</dc:creator>
      <dc:creator>Sleivert, G. G.</dc:creator>
      <content:encoded><![CDATA[The purpose of this study was to determine whether a low-volume high-intensity resistance training session influenced running economy during a subsequent aerobic treadmill run. Nine well trained distance runners (mean +/- SD; VO2max, 66.6 +/- 10.2 ml x kg(-1) x min(-1); weight, 65.8 +/- 10.2 kg; height, 173.4 +/- 7.8 cm; age 20 +/- 1.1 years) with resistance training experience performed treadmill running at two different speeds (0.56 m x sec(-1) and 0.20 m x sec(-1) below speed corresponding to lactate equilibrium) either rested or 1, 8 or 24 hours after a 50-minute whole body resistance training session. Running economy was assessed using open circuit spirometry while heart rate was recorded telemetrically. The contractile properties of the quadriceps femoris were also determined following each resistance training session and prior to each treadmill run using percutaneous electrical stimulation. Submaximal oxygen consumption was significantly increased one hour (2.6 +/- 2.3%, p= 0.007), and eight hours (1.6 +/- 2.5%, p= 0.032), but not 24 hours after resistance training. No significant differences were found in exercising heart rate, ventilation, respiratory exchange ratio, ratings of perceived exertion, or running mechanics. Peak twitch torque, time to peak torque, and half relaxation time of the quadriceps femoris were significantly reduced immediately following resistance training while peak twitch torque was also lower one hour following resistance training. Running economy following a resistance training session is impaired for up to 8 hours. This change was not paralleled by a concomitant change in exercising heart rate. The mechanism responsible for increased oxygen consumption following resistance training may be related to impairment of the force generating capacity of skeletal muscle, as there was a significant decrement in the contractile properties of the quadriceps femoris following resistance training.]]></content:encoded>
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