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Olympic weightlifting training causes different knee muscle-coactivation adaptations compared with traditional weight
Fotini Arabatzi1, Eleftherios Kellis
1Laboratory of Neuromechanics, Department of Physical Education and Sport Science, Aristotle University of Thessaloniki at Serres, Serres, Greece. farabaji@phed-sr.auth.gr
Journal of Strength and Conditioning Research
|October 15, 2011
Summary
Olympic weightlifting (OL) training improved vertical jump performance by maintaining knee muscle coactivation. Traditional weight (TW) training increased coactivation, potentially enhancing joint stability but not jump height.
Area of Science:
- Sports Science
- Biomechanics
- Exercise Physiology
Background:
- Muscle coactivation plays a crucial role in dynamic movements like vertical jumps.
- Different training modalities may influence neuromuscular control and joint stability differently.
Purpose of the Study:
- To compare the effects of Olympic weightlifting (OL) versus traditional weight (TW) training on knee joint muscle coactivation during vertical jumps.
- To investigate how these training programs impact jump performance metrics.
Main Methods:
- Twenty-six male participants were divided into OL, TW, and control groups, training for 8 weeks.
- Electromyography (EMG), kinematics, vertical stiffness, jump height, and power were measured during squat jump, countermovement jump (CMJ), and drop jump (DJ).
- Knee muscle coactivation index (CI) was calculated using antagonist and agonist EMG activity.
Main Results:
- Both OL and TW training increased coactivation during preactivation and eccentric phases.
- The OL group demonstrated superior improvements in leg stiffness and jump height compared to the TW group.
- OL training led to decreased or maintained coactivation during propulsion, while TW training increased it.
Conclusions:
- Olympic weightlifting training enhances vertical jump performance through optimized muscle activation patterns and leg stiffness.
- Traditional weight training may prioritize joint stability by increasing coactivation, potentially at the expense of peak jump performance.
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