Kinesiology, Vol. 36 No. 1., 2004.
Original scientific paper
How can dynamic rigid-body modeling be helpful in motor learning? - diagnosing performance using dynamic modeling
Gongbing Shan
Martin Sust
Stephane Simard
Christina Bohn
Klaus Nicol
Abstract
There are two main problems for biomechanists in motor learning practice. One is theory vs. experience, the other is the determination of dominative information directly helpful in the practice. This project aimed at addressing these problems from a quantitative aspect by using motion capture and biomechanical rigid body modeling. The purposes were to identify differences in the description of movements amongst motion analysists (external view), athletes (internal sight) and coaches (internal sight from external view; Lippens, 1997) and to identify applicable and germane information for the practitioners. A trampoline skill of a vertical takeoff and landing on the back was selected for the project. The skill was captured and modeled using a five-segment model: head-trunk, arm, thigh, shank and foot. Through the application of dynamic and inverse dynamic analysis, timely variations in joint angles and muscle moments (shoulder, hip, knee and ankle) were calculated to determine description differences among the three views and seek a possible linkage within them. Results show that the inertial and non-inertial systems as well as the coupling of body segments established the differences among the three views and that joint rotations are not identical with the muscular moments, therefore, passive rotations (McGeer, 1990) can occur, and lastly, knowledge of muscular moments at 'critical' and passive phases should be emphasized during motor learning. It is concluded that biomechanical modeling should be a platform to link all three views and supply a more holistic picture on human motor control.
Keywords
external view; internal sight; passive phase; critical phase; muscular moments; anthropometry
Hrčak ID:
4216
URI
Publication date:
28.6.2004.
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