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Effect of Fatigue on Movement Patterns During a Loaded Ruck March.

Audra E Bloch¹, J Josiah Steckenrider¹, Rebecca A Zifchock¹

¹Department of Civil & Mechanical Engineering, U.S. Military Academy, West Point, NY 10996, USA.

Military Medicine

|April 21, 2023

Summary

This summary is machine-generated.

Loaded ruck marches alter soldiers' gait, increasing stride width and torso lean variability as fatigue sets in. These findings can help predict fatigue and prevent injuries during military training.

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Area of Science:

Military science
Biomechanics
Sports medicine

Background:

Loaded ruck marching is a common military task.
It is associated with fatigue, reduced readiness, and injuries.
Understanding gait changes during marches can inform injury prevention.

Purpose of the Study:

To examine changes in soldiers' gait patterns during a loaded ruck march.
To correlate fatigue with kinematic parameters.
To investigate how fatigue impacts gait over distance.

Main Methods:

Three platoons of soldiers participated in a 7-mile ruck march.
Inertial measurement sensors recorded gait parameters (stride length, width, ankle yaw, torso lean).
One-way repeated measure ANOVAs compared gait parameters between march segments.

Main Results:

Stride length decreased from the first to the last quarter of the march.
Stride width and its variability increased.
Anterior-posterior and side-to-side torso lean variability also increased.

Conclusions:

Gait changes observed can indicate increasing fatigue during loaded ruck marches.
These findings can improve methods for quantifying and predicting soldier fatigue.
Enhanced fatigue prediction may lead to more effective injury prevention strategies.