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Joint Coordination and Muscle-Tendon Interaction Differ Depending on The Level of Jumping Performance
Iseul Jo1,2, Hae-Dong Lee3,2
1Department of Physical Education, Graduate School of Yonsei University, Seoul, Korea.
Journal of Sports Science & Medicine
|June 9, 2023
Summary
Skilled jumpers utilize elastic energy recoil more effectively during countermovement jumps. This study reveals differences in muscle-tendon interaction, highlighting efficient neuromuscular control in high jumpers.
Area of Science:
- Biomechanics
- Sports Science
- Human Movement Analysis
Background:
- The countermovement jump (CMJ) is a key metric for assessing athletic muscle power.
- Optimizing the stretch-shortening cycle (SSC) through coordinated body segment movement is crucial for jump height.
- Understanding the role of ankle joint dynamics and muscle-tendon interaction in CMJ performance is essential.
Purpose of the Study:
- To investigate how ankle joint kinematics, kinetics, and muscle-tendon interaction vary with jump skill level and intensity.
- To explore the underlying mechanisms of the stretch-shortening cycle (SSC) in high versus low jumpers.
- To determine if skilled jumpers exhibit superior muscle-tendon interaction during countermovement jumps.
Main Methods:
- Categorized 16 healthy males into High (jump > 50 cm) and Low (jump < 50 cm) jumper groups.
- Analyzed lower limb joint kinematics and kinetics using 3D motion analysis during light and maximal effort jumps.
- Investigated muscle-tendon interaction, including fascicle and tendon dynamics, via B-mode real-time ultrasonography.
Main Results:
- Increased jump intensity led to greater joint velocity and power in all participants.
- High jumpers exhibited less fascicle shortening velocity and greater tendon velocity compared to low jumpers.
- High jumpers demonstrated a delayed onset of ankle extension, suggesting enhanced utilization of the elastic catapult mechanism.
Conclusions:
- Muscle-tendon interaction during countermovement jumps is significantly influenced by jump skill level.
- Skilled jumpers display more efficient neuromuscular control, leveraging elastic energy recoil through their tendons.
- Findings suggest that optimizing the stretch-shortening cycle via muscle-tendon interaction is a key differentiator in jump performance.
Keywords:
Ankle plantar flexordynamic catch mechanismforce-power relationshipforce-velocity relationshipseries elastic elementsMore Related Videos
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