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Related Experiment Videos

Ground reaction forces during the power clean.

Aaron L Souza1, Sean D Shimada, Alicia Koontz

  • 1Biomechanical Consultants of California, Davis 95616, USA. alsst136@pitt.edu

Journal of Strength and Conditioning Research
|August 14, 2002
PubMed
Summary

Understanding ground reaction forces (Fz) in the power clean is crucial for athletic performance. Peak force (Fz) during the second pull is greater than the first pull, with technique optimization aiding competitive success.

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Area of Science:

  • Biomechanics
  • Sports Science
  • Human Movement Analysis

Background:

  • The power clean is a complex athletic movement requiring significant force production.
  • Understanding the biomechanical forces involved is essential for optimizing performance and preventing injury.
  • Ground reaction forces (Fz) are a key indicator of force application during lifts.

Purpose of the Study:

  • To characterize and describe ground reaction forces (Fz) during the power clean lift.
  • To analyze how different percentages of maximum clean weight affect force production.
  • To identify key phases of the power clean with distinct force characteristics.

Main Methods:

  • Data collected from 10 collegiate weightlifting men.
  • Utilized three 60-Hz motion-detecting cameras and an AMTI force plate.

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  • Subjects performed power cleans at 60% and 70% of their maximum clean.

    • Main Results:

    • A greater peak ground reaction force (Fz) was observed during the second pull phase compared to the first pull and unweighted phases.
    • Increasing weight from 60% to 70% of maximum clean resulted in increased peak force (Fz) during the first pull and unweighted phases.
    • Peak force (Fz) during the second pull phase decreased as weight increased from 60% to 70%.

    Conclusions:

    • The second pull phase is critical for maximal force generation in the power clean.
    • Weight progression influences force application differently across power clean phases.
    • Mastering proper power clean technique is fundamental for competitive athletic success.