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Related Concept Videos

Kinematic Equations - I01:26

Kinematic Equations - I

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When an object moves with constant acceleration, the velocity of the object changes at a constant rate throughout the motion. The kinematic equations of motions are derived for such cases where the acceleration of the object is constant. The first kinematic equation gives an insight into the relationship between velocity, acceleration, and time. We can see, for example:
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Kinematic Equations: Problem Solving01:15

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When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
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Related Experiment Video

Updated: Jan 6, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
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Changes in running kinematics and kinetics after a 12-week running program for beginners.

Ellen Maas1, Benedicte Vanwanseele1

  • 1Department of Movement Sciences, Biomedical Sciences Group, KU Leuven, Leuven, Belgium.

Sports Biomechanics
|October 2, 2019
PubMed
Summary

A 12-week running program for novice runners did not significantly alter running kinematics or kinetics. This suggests beginner training may not improve running economy or reduce injury risk through biomechanical changes.

Keywords:
Biomechanicsnovice runnerstraining

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Area of Science:

  • Biomechanics
  • Sports Science
  • Exercise Physiology

Background:

  • Novice runners exhibit lower running economy and higher injury risk compared to trained runners.
  • Running economy and injury risk are linked to potentially trainable biomechanical factors.

Purpose of the Study:

  • To investigate the impact of a 12-week beginner running program on running kinematics and kinetics.
  • To determine if training leads to biomechanical adaptations associated with improved running economy and reduced injury risk.

Main Methods:

  • 27 novice runners participated in a 12-week training program.
  • Full-body, 3D running analysis was conducted pre- and post-training.
  • Key outcome variables included joint angles, moments, and ground reaction forces (GRF).

Main Results:

  • A significant increase in hip external rotation moment (0.01 Nm/kg) was observed.
  • Peak vertical ground reaction force (GRF) decreased by 4.05% (0.9 N/kg).
  • No significant changes were found in peak joint angles.

Conclusions:

  • A 12-week beginner running program focused on endurance did not yield significant changes in running kinematics or kinetics.
  • The observed biomechanical changes were not those typically associated with enhanced running economy or lower injury risk in novice runners.