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    Area of Science:

    • Biomechanics
    • Human Movement Science
    • Gait Analysis

    Background:

    • Interlimb coordination is crucial for effective walking, involving synchronized movement of the left and right legs.
    • Dynamic treadmill walking, which alters treadmill speed during the gait cycle, is a novel environment whose coordination demands are not fully understood.
    • Assessing dynamic treadmill walking in clinical populations requires prior knowledge of its effects on interlimb coordination in healthy individuals.

    Purpose of the Study:

    • To investigate the interlimb coordination requirements of dynamic treadmill walking in healthy young adults.
    • To quantify changes in gait coordination under different dynamic treadmill conditions.
    • To understand the potential of dynamic treadmill walking for gait rehabilitation.

    Main Methods:

    • Ten healthy young adults participated in the study.
    • Interlimb coordination was quantified using phase shift, center of oscillation, and center of oscillation difference.
    • Participants walked on a treadmill with varying speed conditions (Fast, Slow, Accelerate, Decelerate).

    Main Results:

    • The 'Fast' dynamic treadmill condition significantly increased phase shift, indicating the right leg led the left leg.
    • The 'Fast' condition also resulted in a more flexed oscillation axis for the right leg compared to the left.
    • Dynamic treadmill walking altered interlimb coordination in both spatial and temporal domains, with specific changes varying by condition.

    Conclusions:

    • Different dynamic treadmill walking protocols induce varying degrees of change in interlimb coordination.
    • Dynamic treadmill walking is adaptable, allowing for tuning of biomechanical and coordination parameters.
    • This adaptability suggests potential for using dynamic treadmill walking to restore gait symmetry in individuals with asymmetric gaits.