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Scapulothoracic kinematics during tennis forehand drive
Sports Biomechanics
|August 16, 2014
Summary
Tennis players exhibit significant scapular motion during forehand drives, particularly in anterior tilt and internal rotation during the follow-through. This high amplitude movement may contribute to scapular dyskinesis, impacting shoulder health in athletes.
Area of Science:
- Sports Medicine
- Biomechanics
- Kinesiology
Background:
- Scapular dyskinesis is a known kinetic chain abnormality.
- Limited research quantifies scapular motion during high-velocity sport tasks.
- Understanding scapular kinematics is crucial for identifying sport-specific pathologies.
Purpose of the Study:
- To quantify scapulothoracic kinematics during tennis forehand drives.
- To evaluate the repeatability of scapular motion in skilled tennis players.
- To investigate the potential contribution of tennis strokes to scapular dyskinesis.
Main Methods:
- Video-based motion analysis of eight highly skilled tennis players performing forehand drives.
- Computation of scapulothoracic kinematics (upward/downward rotation, anterior/posterior tilt, internal/external rotation) using an acromial marker cluster.
- Analysis of scapular motion across different phases of the tennis stroke (backswing, forward swing, follow-through).
Main Results:
- Significant scapular motion was observed: upward rotation (1-26°), anterior tilt (7-32°), and internal rotation (42-100°).
- Scapular angles showed minimal changes during backswing and forward swing.
- Rapid increases in scapular angles occurred during the follow-through phase.
Conclusions:
- The tennis forehand drive, especially the follow-through, involves substantial scapular anterior tilt and internal rotation.
- These large-amplitude movements suggest a potential contribution to scapular dyskinesis in tennis players.
- Quantifying normal scapular motion in high-velocity sports aids in understanding adaptations and pathologies.
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