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    <item>
      <title>Mechanische und metabolische Belastung beim Radfahren - eine Analyse aus physiologischer und biomechanischer Sicht</title>
      <pubDate>Mon, 01 Jan 2001 18:06:18 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3032715</link>
      <guid>https://sponet.de/sponet/Record/3032715</guid>
      <author>Beneke, R.</author>
      <author>Di Prampero, P. E.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Radsport</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Energiestoffwechsel</dc:subject>
      <dc:subject>Modellierung</dc:subject>
      <dc:subject>Mechanik</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Beneke, R.</dc:creator>
      <dc:creator>Di Prampero, P. E.</dc:creator>
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      <title>Mechanische und metabolische Belastung beim Radfahren - eine Analyse aus physiologischer und biomechanischer Sicht</title>
      <pubDate>Mon, 01 Jan 2001 18:06:18 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4005031</link>
      <guid>https://sponet.de/sponet/Record/4005031</guid>
      <author>Beneke, R.</author>
      <author>Di Prampero, P. E.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Radsport</dc:subject>
      <dc:subject>Mechanik</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Energiestoffwechsel</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Belastbarkeit</dc:subject>
      <dc:subject>Aerodynamik</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Beneke, R.</dc:creator>
      <dc:creator>Di Prampero, P. E.</dc:creator>
      <content:encoded><![CDATA[Bicycle riding has been booming during recent years utilizing the bike as sports kit for leisure time recreational and top performance exercises or simply as a reasonable vehicle in daily life. This enthusiasm is essentially based on the fact that at a given velocity cycling needs less metabolic power than any other terrestial muscle-powered mode of human locomotion. In the present paper cycling is described and analysed as a complex model of performance limiting factors with special respect to physiology and biomechanics. The model includes cycling velocity (v), rolling resistance (C R ) and resistances against gravity (C G ) as body mass related factors of physical strain (a = C R + C G ) but also air resistance (C L = b (v + v L cos . ) 2 ) considering wind velocity (v L ) and wind
direction (. ). The parameter b subsumes drag coefficient agianst air, area projected on the frontal plane and air density. The metabolic power results from biomechanical efficiency (ç ) and mechanical power (P Mech ) based on interrelationships described above (P Met = P Mech ç -1 = (C R + C G + C L ) v ç -1 = (a + b (v + v L cos . ) 2 ) ç -1 ). The model enables calculation of energy cost of cycling and thus performance limitations with respect to physical fitness under various conditions which makes optimized prescription
of exercise training possible.]]></content:encoded>
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