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Changes in specific jumping performance after detraining period.

T M Kannas1, I G Amiridis, F Arabatzi

  • 1Department of Physical Education and Sports Science of Serres, Aristotle University of ThessalonikiLaboratory of Neuromechanics, Serres, Greece - akatis@phed-sr.auth.gr.

The Journal of Sports Medicine and Physical Fitness
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PubMed
Summary
This summary is machine-generated.

Detraining after plyometric training reduces vertical jump height and ankle muscle-tendon properties. These changes suggest a return to pre-training values, possibly due to altered muscle working length.

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Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Plyometric training enhances explosive power and muscle-tendon properties.
  • Detraining periods can lead to a loss of training adaptations.
  • Understanding detraining effects is crucial for optimizing training programs.

Purpose of the Study:

  • To investigate the impact of a four-week detraining period on vertical jump performance.
  • To assess changes in the mechanical properties of the medial gastrocnemius (MG) aponeurosis after detraining.
  • To examine the electromyographic (EMG) activity of lower leg muscles post-detraining.

Main Methods:

  • Twenty participants were divided into incline (IP) and plane plyometric training groups.
  • Vertical jump tests (SJ, CMJ, DJ) and MG aponeurosis strain were measured.
  • MG and tibialis anterior (TA) muscle EMG activity and MG architecture were recorded post-detraining.

Main Results:

  • Vertical jump height significantly decreased after the detraining period for fast drop jumps (DJf20, DJf40).
  • The incline plyometric group showed reduced MG activity during propulsion and decreased aponeurosis strain.
  • Muscle-tendon complex properties reverted towards pre-training levels.

Conclusions:

  • Four weeks of detraining reverses gains in vertical jump performance and muscle-tendon properties.
  • Detraining may alter muscle working length, impacting performance.
  • Findings highlight the importance of continued training to maintain adaptations.