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Changes in bar-path kinematics and kinetics after power-clean training
Jason B Winchester1, Travis M Erickson, John B Blaak
1Department of Exercise and Sport Science, Musculoskeletal Research Center, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, USA.
Journal of Strength and Conditioning Research
|February 12, 2005
Summary
Four weeks of power clean (PC) training significantly improved kinematic and kinetic variables. Focusing on proper bar path during PC exercise enhances force and power output, especially for beginners.
Area of Science:
- Sports Science
- Biomechanics
- Strength and Conditioning
Background:
- The power clean (PC) is a complex Olympic lift requiring precise technique.
- Understanding the effects of training on kinematic and kinetic variables is crucial for performance enhancement.
Purpose of the Study:
- To investigate kinematic changes in bar path and kinetic variables after 4 weeks of power clean (PC) training.
- To determine the impact of feedback-enhanced training on PC performance.
Main Methods:
- Eighteen experienced male lifters participated.
- Subjects underwent 4 weeks of PC training (3x/week) with visual and verbal cues.
- Kinematic and kinetic variables were measured at 50%, 70%, and 90% of pre-training 1-repetition maximum (1RM) using videography.
Main Results:
- Significant improvements were observed in peak force across all tested percentages of 1RM.
- Peak power at 50% of 1RM increased notably.
- All measured bar-path kinematic variables showed significant improvements.
Conclusions:
- Four weeks of PC training, incorporating feedback, effectively enhances both kinematic and kinetic variables.
- Emphasis on proper bar path during PC training may be key for developing force and power.
- Further research is needed to solidify the relationship between bar-path modifications and kinetic performance gains.