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    <item>
      <title>Auswirkungen verschiedener simulierter Höhen auf die Wiederholungssprintleistung von Mannschaftssportlern</title>
      <pubDate>Wed, 01 Jan 2014 11:22:45 +0100</pubDate>
      <link>https://www.sponet.de/sponet/Record/4041129</link>
      <guid>https://www.sponet.de/sponet/Record/4041129</guid>
      <author>Goods, P.</author>
      <author>Dawson, B.</author>
      <author>Landers, G.</author>
      <author>Gore, C.</author>
      <author>Peeling, P.</author>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:subject>Simulation</dc:subject>
      <dc:subject>Hypoxie</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Spielsportart</dc:subject>
      <dc:subject>intermittierend</dc:subject>
      <dc:subject>Stoffwechsel</dc:subject>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:creator>Goods, P.</dc:creator>
      <dc:creator>Dawson, B.</dc:creator>
      <dc:creator>Landers, G.</dc:creator>
      <dc:creator>Gore, C.</dc:creator>
      <dc:creator>Peeling, P.</dc:creator>
      <content:encoded><![CDATA[Purpose: This study aimed to assess the impact of three simulated altitude exposure heights on repeat sprint performance in team sport athletes. 
Methods: Ten trained male team sport athletes completed three sets of repeated sprints (9 x 4 s separated by varying recovery jogging times and 3 min rest between sets) on a non-motorised treadmill (Woodway Force 3.0) at sea-level or at simulated altitudes of 2000, 3000 and 4000 m. Participants completed four trials in a random order over 4 weeks, with total work (J), mean power output (MPO), peak power output (PPO), blood lactate concentration (BLa) and oxygen saturation (SaO2) recorded after each set. 
Results: Each increase in simulated altitude corresponded with a significant decrease in SaO2. Total work across all sets was highest at sea-level and correspondingly lower at each successive altitude (p<0.05; sea level 158914 ± 13094 J > 2000 m 149046 ± 10124 J > 3000 m 141126 ± 11083 J > 4000 m 127466 ± 8519 J). In the first set, MPO was lower at 4000 m only, but for subsequent sets 2 & 3, decreases in MPO were observed at all altitudes (p<0.05; sea-level > 2000 m > 3000 m > 4000 m). Sea-level PPO was maintained in all sets except for set 3 at 400 m (p<0.05, 4000 m 1661 ± 520 W < sea level 2135 ± 365 W and 2000 m 2125 ± 376 W). Blood lactate levels at 4000 m were significantly greater (p<0.05) than at sea-level after all sets, whereas BLa at 3000 m was only elevated compared to sea-level in the final 2 sets, and at 2000 m BLa was unchanged compared to sea-level. 
Conclusions: These results suggest that when completing intermittent hypoxic training, higher may not be better, since a simulated altitude of 4000 m may potentially blunt absolute training quality. Therefore, it is recommended that a moderate simulated altitude (2000-3000 m) be employed when implementing intermittent hypoxic repeat sprint training for team sport athletes to maintain training output while adding a hypoxic stimulus. However, the possibility of the increased metabolic cost at 4000 m having some positive outcome on performance cannot be discounted and should be further investigated in a training study.]]></content:encoded>
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    <item>
      <title>Auswirkung verschiedener simulierter Höhen auf die wiederholte Sprintleistung von Sportlern aus Spielsportarten</title>
      <pubDate>Wed, 01 Jan 2014 11:22:45 +0100</pubDate>
      <link>https://www.sponet.de/sponet/Record/4033248</link>
      <guid>https://www.sponet.de/sponet/Record/4033248</guid>
      <author>Goods, P. S. R.</author>
      <author>Dawson, B. T.</author>
      <author>Landers, G. J.</author>
      <author>Gore, C. J.</author>
      <author>Peeling, P.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Spielsportart</dc:subject>
      <dc:subject>Höhentraining</dc:subject>
      <dc:subject>Hypoxie</dc:subject>
      <dc:subject>Simulation</dc:subject>
      <dc:subject>Trainingswirkung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Goods, P. S. R.</dc:creator>
      <dc:creator>Dawson, B. T.</dc:creator>
      <dc:creator>Landers, G. J.</dc:creator>
      <dc:creator>Gore, C. J.</dc:creator>
      <dc:creator>Peeling, P.</dc:creator>
      <content:encoded><![CDATA[Purpose: This study aimed to assess the impact of 3 heights of simulated altitude exposure on repeat-sprint performance in teamsport athletes. Methods: Ten trained male team-sport athletes completed 3 sets of repeated sprints (9 × 4 s) on a nonmotorized treadmill at sea level and at simulated altitudes of 2000, 3000, and 4000 m. Participants completed 4 trials in a random order over 4 wk, with mean power output (MPO), peak power output (PPO), blood lactate concentration (Bla), and oxygen saturation (SaO2) recorded after each set. Results: Each increase in simulated altitude corresponded with a significant decrease in SaO2. Total work across all sets was highest at sea level and correspondingly lower at each successive altitude (P < .05; sea level < 2000 m < 3000 m < 4000 m). In the first set, MPO was reduced only at 4000 m, but for subsequent sets, decreases in MPO were observed at all altitudes (P < .05; 2000 m < 3000 m < 4000 m). PPO was maintained in all sets except for set 3 at 4000 m (P < .05; vs sea level and 2000 m). BLa levels were highest at 4000 m and significantly greater (P < .05) than at sea level after all sets. Conclusions: These results suggest that "higher may not be better," as a simulated altitude of 4000 m may potentially blunt absolute training quality. Therefore, it is recommended that a moderate simulated altitude (2000-3000 m) be employed when implementing intermittent hypoxic repeat-sprint training for team-sport athletes.]]></content:encoded>
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