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A biomechanical study of side steps at different distances
Yuki Inaba1, Shinsuke Yoshioka, Yoshiaki Iida
1Department of Life Sciences, University of Tokyo, Meguro, Tokyo, Japan.
Journal of Applied Biomechanics
|August 28, 2012
Summary
This study analyzed lower extremity joint kinetics during side steps. Hip, knee, and ankle extension torques significantly influenced side step distance, highlighting their importance in lateral quickness.
Area of Science:
- Biomechanics
- Sports Science
- Human Movement Analysis
Background:
- Lateral quickness is vital in sports, yet the underlying biomechanical factors remain unclear.
- Understanding joint function during lateral movements is essential for performance enhancement.
Purpose of the Study:
- To quantify 3-dimensional kinetics of the hip, knee, and ankle during side steps.
- To elucidate the functional roles of lower extremity muscle groups in lateral movements.
Main Methods:
- Nine male subjects performed side steps at various distances.
- Kinematic and ground reaction force data were collected.
- Inverse dynamics calculated net joint torques and work.
Main Results:
- Hip, knee, and ankle extension torques and work substantially affected side step distances.
- Hip abduction work showed less sensitivity to changes in step distance.
- Hip abduction primarily stabilized the trunk and initiated lateral acceleration.
Conclusions:
- Extension power at the hip, knee, and ankle is key for generating side step distance.
- Hip abduction's role is more about initial lateral propulsion and stability than generating propulsive power.
