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Related Experiment Video

Updated: Jun 19, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

Body position determines propulsive forces in accelerated running.

F Kugler¹, L Janshen

¹Department of Training and Movement Sciences, Humboldt-University Berlin, Philippstr 13, Haus 11, DE-10115 Berlin, Germany. mail@floriankugler.de

Journal of Biomechanics

|October 30, 2009

Summary

This summary is machine-generated.

Running acceleration depends on body position, not just force. Optimal forward lean and controlled vertical forces are key for maximizing propulsion and stride frequency in athletes.

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Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

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Published on: July 26, 2022

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Last Updated: Jun 19, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Published on: July 26, 2022

Area of Science:

Biomechanics
Sports Science
Human Movement

Background:

Efficient running acceleration is vital for athletic performance.
Achieving high stride frequencies requires minimizing vertical ground reaction forces.
Propulsive and vertical forces are interdependent due to angular momentum constraints.

Purpose of the Study:

To investigate the relationship between body position and propulsive forces during running acceleration.
To determine if performance level influences the dependency of propulsive force on body position.
To identify strategies for optimizing forward propulsion in runners.

Main Methods:

Cross-sectional study involving 41 physical education students (28 male, 13 female).
Participants performed submaximal and maximal running accelerations.
Ground reaction forces and whole-body kinematics were measured.

Main Results:

Higher accelerations were achieved with lower, more forward-oriented forces.
The orientation of the maximum force vector strongly correlated with the body's forward lean at toe-off (r=0.93).
Similar propulsive forces were observed at equivalent body positions across all subjects, indicating mechanical constraints.

Conclusions:

Running acceleration is primarily constrained by the body's ability to maintain a stable posture.
Faster runners adopt strategies like posterior foot placement or longer ground contact time to increase forward lean.
Optimizing body position is crucial for maximizing forward propulsion, rather than simply applying maximal force.