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Influence of plyometric training on the mechanical impedance of the human ankle joint

  • Christophe Cornu
  • Maria-Izabel Almeida Silveira
  • F. Goubel
ORIGINAL ARTICLE

Abstract

The objective of this work was to study the effects of plyometric training on the mechanical properties of the ankle joint in humans. Changes in the mechanical parameters of this musculo-articular structure were quantified with the aid of a sinusoidal perturbation technique. This technique allowed the expression of the mechanical impedance of the musculo-articular system in terms of stiffness, viscosity and inertia. Measurements were performed under passive conditions and when the subject performed plantar flexion. A 7-week period of training induced a decrease in the slope of the relationship between stiffness and plantar flexion torque, whereas passive stiffness was increased. A slight decrease in viscosity and an invariability in inertia were also found. These results are interpreted in terms of the possible adaptations of the musculo-articular structure and ultrastructure involved in the performance of plantar flexion.

Key words Mechanical impedance Sinusoidal perturbation Plyometric training Ankle ergometer Muscle mechanics 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Christophe Cornu
    • 1
  • Maria-Izabel Almeida Silveira
    • 1
  • F. Goubel
    • 1
  1. 1.Département de Génie Biologique UMR CNRS 6600, Université de Technologie de Compiègne, B.P. 20529, F-60205 Compiègne Cédex, FranceFR

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