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Torso dynamics during follow through in baseball batting.
Gen Horiuchi1, Hirotaka Nakashima2
1Faculty of Health and Well-being, Kansai University, Osaka, Japan.
Sports Biomechanics
|May 4, 2022
Summary
Higher bat swing speed after impact in baseball is linked to increased torso rotation torque, potentially straining abdominal oblique muscles during follow-through.
Area of Science:
- Biomechanics
- Sports Science
- Kinesiology
Background:
- Baseball batting involves complex kinetic chains.
- Understanding torso dynamics is crucial for performance and injury prevention.
Purpose of the Study:
- To investigate the relationship between post-impact bat swing speed and torso rotational dynamics during the follow-through phase.
- To identify biomechanical factors influencing bat speed and potential muscle strain.
Main Methods:
- Utilized motion capture and force plates to record batting motion and ground reaction forces in 29 collegiate baseball players.
- Calculated biomechanical variables for the torso joint, specifically focusing on rotational torque and power.
Main Results:
- A significant negative correlation was found between bat head speed post-impact and peak negative rotation torque (r = -0.635, p < 0.001) and peak negative rotation power (r = -0.590, p = 0.001) in the torso joint for right-handed batters.
- Negative torque and power indicate eccentric contraction of the left external abdominal oblique muscle during follow-through.
Conclusions:
- The findings suggest that increased bat head speed post-impact is associated with greater eccentric loading on the left external abdominal oblique muscle.
- Higher bat speeds may increase the risk of abdominal oblique muscle strain during the baseball batting follow-through.
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