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    <item>
      <title>Ein vereinfachter Ansatz zur Bestimmung der ventilatorischen und respiratorischen Kompensationsschwellen</title>
      <pubDate>Wed, 01 Jan 2014 08:10:57 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4043596</link>
      <guid>https://sponet.de/sponet/Record/4043596</guid>
      <author>Condello, G.</author>
      <author>Reynolds, E.</author>
      <author>Foster, C.</author>
      <author>de Koning, J. J.</author>
      <author>Casolino, E.</author>
      <author>Knutson, M.</author>
      <author>Porcari, J. P.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Atmung</dc:subject>
      <dc:subject>Ventilationsschwelle</dc:subject>
      <dc:subject>Untersuchungsmethode</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>maximal</dc:subject>
      <dc:subject>Herzfrequenz</dc:subject>
      <dc:subject>Laktat</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Condello, G.</dc:creator>
      <dc:creator>Reynolds, E.</dc:creator>
      <dc:creator>Foster, C.</dc:creator>
      <dc:creator>de Koning, J. J.</dc:creator>
      <dc:creator>Casolino, E.</dc:creator>
      <dc:creator>Knutson, M.</dc:creator>
      <dc:creator>Porcari, J. P.</dc:creator>
      <content:encoded><![CDATA[This study aimed to investigate whether ventilatory (VT) and respiratory compensation (RCT) thresholds could be derived from percentages of maximal running speed (Vmax). During the model building phase (1), VT & RCT of 31 competitive level athletes were identified with respiratory gas exchange. During the cross-validation phase (2), 20 subjects performed a treadmill test to identify Vmax and then they performed 30-min runs at velocities 2SE below or above the velocity at VT and RCT derived from (1), with measurement of blood lactate [BL], RPE, heart rate (HR), and speech comfort. Phase (1) revealed that VT and RCT were reached at 67 ± 9% and 84 ± 6% of Vmax. In (2) sustained running 2SE below VT (64% Vmax) was associated with the ability to finish 30-min, with low and constant [BL] (~2.5 mmol.l-1), moderate RPE (~3.0-3.5), a small HR drift, and ability to speak comfortably. Conversely, running at 2SE above RCT (86% Vmax) was associated with the inability to finish 30-min (18.5 ± 2.5 min to fatigue), increasing [BL] (end-exercise = 11.9 ± 0.9 mmol.l-1), high RPE (end-exercise = 8.9 ± 1.0), large HR drift (end-exercise = 98 ± 3% HRmax), and inability to speak comfortably. Simple percentages of Vmax (=64% and =86%) obtained from a treadmill test without gas exchange, may be useful for prescribing exercise training intensities.]]></content:encoded>
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    <item>
      <title>Ein vereinfachter Ansatz zur Bestimmung der Ventilations- und Atmungskompensationsschwellen</title>
      <pubDate>Wed, 01 Jan 2014 08:10:57 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4031627</link>
      <guid>https://sponet.de/sponet/Record/4031627</guid>
      <author>Condello, G.</author>
      <author>Reynolds, E.</author>
      <author>Foster, C.</author>
      <author>de Koning, C. J.</author>
      <author>Casolino, E.</author>
      <author>Knutson, M.</author>
      <author>Porcari, J. P.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Atmung</dc:subject>
      <dc:subject>Ventilationsschwelle</dc:subject>
      <dc:subject>Laktat</dc:subject>
      <dc:subject>Blut</dc:subject>
      <dc:subject>Untersuchungsmethode</dc:subject>
      <dc:subject>O2-Aufnahme</dc:subject>
      <dc:subject>maximal</dc:subject>
      <dc:subject>Belastungsintensität</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Condello, G.</dc:creator>
      <dc:creator>Reynolds, E.</dc:creator>
      <dc:creator>Foster, C.</dc:creator>
      <dc:creator>de Koning, C. J.</dc:creator>
      <dc:creator>Casolino, E.</dc:creator>
      <dc:creator>Knutson, M.</dc:creator>
      <dc:creator>Porcari, J. P.</dc:creator>
      <content:encoded><![CDATA[This study aimed to investigate whether ventilatory (VT) and respiratory compensation (RCT) thresholds could be derived from percentages of maximal running speed (Vmax). During the model building phase (1), VT & RCT of 31 competitive level athletes were identified with respiratory gas exchange. During the cross-validation phase (2), 20 subjects performed a treadmill test to identify Vmax and then they performed 30-min runs at velocities 2SE below or above the velocity at VT and RCT derived from (1), with measurement of blood lactate [BL], RPE, heart rate (HR), and speech comfort. Phase (1) revealed that VT and RCT were reached at 67  +/- 9% and 84  +/- 6% of Vmax. In (2) sustained running 2SE below VT (64% Vmax) was associated with the ability to finish 30-min, with low and constant [BL] (~2.5 mmol.l-1), moderate RPE (~3.0-3.5), a small HR drift, and ability to speak comfortably. Conversely, running at 2SE above RCT (86% Vmax) was associated with the inability to finish 30- min (18.5  +/- 2.5 min to fatigue), increasing [BL] (end-exercise = 11.9 +/- 0.9 mmol.l-1), high RPE (end-exercise = 8.9 +/- 1.0), large HR drift (end-exercise = 98 +/- 3% HRmax), and inability to speak comfortably. Simple percentages of Vmax (.64% and .86%) obtained from a treadmill test without gas exchange, may be useful for prescribing exercise training intensities.]]></content:encoded>
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