European Journal of Applied Physiology

, Volume 112, Issue 8, pp 2849–2857 | Cite as

Effects of plyometric training on passive stiffness of gastrocnemii muscles and Achilles tendon

  • Alexandre Fouré
  • Antoine Nordez
  • Christophe CornuEmail author
Research Article


Plyometric training is commonly used to improve athletic performance; however, it is unclear how each component of the muscle–tendon complex (MTC) is affected by this intervention. The effects of 14 weeks of plyometric training on the passive stiffness of the gastrocnemii muscles and Achilles tendon was determined simultaneously to assess possible local adaptations of elastic properties. The passive force–length relationship of the gastrocnemii MTC and elongation of the gastrocnemii muscles were determined using ultrasonography during passive cyclic stretching in 19 subjects divided into trained (n = 9) and control (n = 10) groups. An upward trend in stiffness of the gastrocnemii MTC (P = 0.09) and a significant increase in the intrinsic gastrocnemii muscle stiffness were found (P < 0.05). In contrast, no significant change in gastrocnemii tendon stiffness, or in muscle and tendon geometry, was determined (P > 0.05). Considering the lack of change in gastrocnemii muscle geometry, the change in the gastrocnemii muscle stiffness may be mainly due to a change in the intrinsic mechanical properties of the muscular tissues.


Range of motion Jump Stiffness Gastrocnemius muscle–tendon complex 



This study was supported by grants from the AFM (Association Française contre les Myopathies, Grant no 13923), Nantes Métropole and the RSPDL network (Recherche et Sport en Pays de la Loire).


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Alexandre Fouré
    • 1
  • Antoine Nordez
    • 1
  • Christophe Cornu
    • 1
    Email author
  1. 1.Laboratoire “Motricité, Interactions, Performance”-EA 4334, UFR STAPS, Université de NantesNantes cedex 3France

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