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Force and momentum are intimately related. Force acting over time can change momentum, and Newton's second law of motion can be stated in its most broadly applicable form in terms of momentum. Momentum can be applied to systems where the mass is changing, such as rockets, as well as to systems of constant mass. Also, momentum continues to be a key concept in the study of atomic and subatomic particles in quantum mechanics. One can consider systems with varying mass in some detail; however, the...
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Related Experiment Video

Updated: Jun 12, 2026

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
07:19

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step

Published on: June 16, 2021

Movement-production strategy in tennis: a case study.

Eric Gillet1, David Leroy, Régis Thouvarecq

  • 1CETAPS Laboratory, Faculty of Sports Sciences, Rouen University, Rouen, France. eric.gillet@univ-rouen.fr

Journal of Strength and Conditioning Research
|June 18, 2010
PubMed
Summary

This study analyzed a professional tennis player's serve-return technique, revealing a predictive movement strategy. The expert player demonstrated reproducible movements with adaptive skills for consistent, successful performance.

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Last Updated: Jun 12, 2026

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
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Area of Science:

  • Sports Science
  • Biomechanics
  • Motor Control

Background:

  • Expertise research often focuses on cognitive aspects, but motor execution is crucial for performance.
  • Understanding the biomechanics of elite athletes provides insights into optimal movement strategies.

Observation:

  • An optoelectronic system analyzed a professional tennis player's serve-return strokes in real-time.
  • Movement-production strategies, including temporal trajectories and kinematic parameters, were examined.

Findings:

  • The expert player exhibited a predictive movement strategy characterized by high reproducibility.
  • Adaptive skills were evident during reprogramming strokes, suggesting flexible motor control.
  • Key differences were noted in racquet displacement, amplitude, and latency, but not in center of gravity movements.

Implications:

  • Findings highlight the interplay between consistent motor programs and adaptive perception-action coupling in elite tennis.
  • This research contributes to understanding the biomechanical underpinnings of expertise in dynamic sports.