Relationships between three potentiation effects of plyometric training and performance
- 19 January 2010
- journal article
- research article
- Published by Wiley in Scandinavian Journal of Medicine & Science in Sports
- Vol. 20 (1), e80-e86
- https://doi.org/10.1111/j.1600-0838.2009.00908.x
Abstract
This study measured the potentiation effects of plyometric training [normalized electromyography (EMG) in triceps surae, stiffness and elastic energy utilization of the Achilles tendon] and investigated the correlations between these effects and performances [voluntary electromechanical delay (EMD) and jump height]. Twenty-one subjects were randomly assigned either to the control group (10 subjects: age 22.3+/-1.6 years) or to a training group (11 subjects: age 22.1+/-1.6 years) that performed 8 weeks of plyometric training. As compared with the performances before training, normalized EMG in the soleus were significantly (P<or=0.001) increased after 4 and 8 weeks of training. Tendon stiffness, elastic energy storage, release and jump height determined after training were significantly increased (P<0.05), with a concomitantly reduced voluntary EMD (P=0.01). These variables also showed significant differences vs the control group (all P<0.05). The other variables remained unchanged. Correlations were observed between tendon stiffness and either voluntary EMD (r=-0. 77, P=0.014) or jump height (r=0.54, P=0.031). Plyometric training specifically potentiated the normalized EMG, tendon stiffness and elastic energy utilization in the myotendinous complex of the triceps surae. Although these changes are possibly essential determinants, only increases of tendon stiffness were observed to correlate with performance improvements.Keywords
This publication has 26 references indexed in Scilit:
- PLYOMETRIC VS.ISOMETRIC TRAINING INFLUENCES ON TENDON PROPERTIES AND MUSCLE OUTPUTJournal of Strength and Conditioning Research, 2007
- A COMPARISON OF VOLUNTARY AND INVOLUNTARY MEASURES OF ELECTROMECHANICAL DELAYInternational Journal of Neuroscience, 2007
- Plyometric vs. Isometric Training Influences on Tendon Properties and Muscle OutputJournal of Strength & Conditioning Research, 2007
- Soleus- and Gastrocnemii-Evoked V-Wave Responses Increase After Neuromuscular Electrical Stimulation TrainingJournal of Neurophysiology, 2006
- Muscle performance during maximal isometric and dynamic contractions is influenced by the stiffness of the tendinous structuresJournal of Applied Physiology, 2005
- Tendon properties in relation to muscular activity and physical trainingScandinavian Journal of Medicine & Science in Sports, 2003
- Effect of low‐load resistance training on the tendon properties in middle‐aged and elderly womenActa Physiologica Scandinavica, 2003
- Strength training alters the viscoelastic properties of tendons in elderly humansMuscle & Nerve, 2003
- Load‐displacement properties of the human triceps surae aponeurosis in vivoJournal Of Physiology-London, 2001
- Electromechanical delay in skeletal muscle under normal movement conditionsActa Physiologica Scandinavica, 1979