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A three-dimensional analysis of angular momentum in the hammer throw
1Department of Physical Education, Indiana University, Bloomington 47405.
Medicine and Science in Sports and Exercise
|April 1, 1989
Summary
Hammer throwers
Area of Science:
- Biomechanics
- Sports Science
- Athletic Performance
Background:
- Understanding the complex movements in hammer throw is crucial for performance.
- Previous research has not fully elucidated the interplay of angular momentum vectors.
Purpose of the Study:
- To analyze the angular momentum of hammer throwers and the hammer.
- To investigate the relationship between angular momentum, trunk tilt, and hammer plane height.
Main Methods:
- Three-dimensional cinematography was used to study eight hammer throwers.
- Analysis of local term (HTL), remote term (HTR), and hammer angular momentum (HH) vectors.
Main Results:
- HTL followed a wide conical path; HTR and HH followed narrower paths.
- Hammer angular momentum (HH) and thrower's total angular momentum (HT) counteracted each other, minimizing system angular momentum (HS) conical motion.
- Trunk tilt and hammer plane height varied between throwers and phases of the throw.
Conclusions:
- The counteracting angular momentum vectors contribute to a stable throwing motion.
- Individual techniques in trunk tilt and hammer plane management exist, with theories proposed for forward-to-backward trunk tilt transitions.