Effect of vertical loading on energy cost and kinematics of running in trained male subjects
Deutscher übersetzter Titel: | Auswirkung von vertikaler Belastung auf den Energieaufwand und die Kinematik des Laufens bei trainierten Maennern |
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Autor: | Bourdin, M.; Belli, A.; Arsac, L.M.; Bosco, C.; Lacour, J.R. |
Erschienen in: | Journal of applied physiology |
Veröffentlicht: | 79 (1995), 6, S. 2078-2085, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 8750-7587, 0021-8987, 0161-7567, 1522-1601 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199603106513 |
Quelle: | BISp |
Abstract des Autors
This investigation examined, in a group of 10 trained male runners, the effect of vertical loading during level treadmill running at a velocity of 5 m/s. The net energy cost of running (Cr), the external work of the center of mass of the body (Wext; both expressed in J/kg/m), and the eccentric-to-concentric ratio (Ecc/Con) of integrated electromyographic activity for the vastus lateralis (VL) and gastrocnemius lateralis muscles were measured. It was observed that Wext and Ecc/Con for the VL could explain a large part of the interindividual variations in Cr. This result reinforces the hypothesis that Ecc/Con could be a good index of effectiveness in the stretch-shortening cycle. When the subjects ran with a vertical load of 9.3% of their body mass, Cr and Wext were significantly reduced, whereas Ecc/Con for the VL and gastrocnemius lateralis remained unchanged. The variations in Cr and Wext due to vertical loading were significantly correlated (r=0.75; P<0.01). It was then concluded that the significant improvement of Cr observed with the added load was mainly due to the fact that Wext was significantly decreased. Verf.-Referat