Cueing Changes in Peak Vertical Ground Reaction Force to Improve Coordination Dynamics in Walking

Area of Science:

• Biomechanics
• Rehabilitation Science
• Motor Control

Background:

• Biofeedback effectively modifies joint loading during gait.
• Altered loading patterns can increase pathological stress and injury risk.
• Understanding joint coordination is crucial for rehabilitation after anterior cruciate ligament reconstruction.

Purpose of the Study:

• To investigate how cueing increased or decreased lower extremity loading affects inter- and intralimb joint coordination during gait.
• To assess the influence of altered loading conditions on joint coordination stability and patterns in individuals post-anterior cruciate ligament reconstruction.

Main Methods:

• 12 participants post-anterior cruciate ligament reconstruction underwent three loading conditions: control, high, and low.
• Visual biofeedback from a force-measuring treadmill guided participants to alter peak vertical ground reaction forces.
• Discrete relative phase and cross-recurrence quantification analyses evaluated joint coordination dynamics (ankle, hip, knee).

Main Results:

• Both high and low loading conditions altered intralimb coordination patterns and stability.
• Low loading decreased coordination stability, showing a 20° greater deviation than the control.
• High loading resulted in a more tightly coupled coordination pattern, indicated by a higher %CDET.

Conclusions:

• Biofeedback-guided alterations in lower extremity loading significantly influence joint coordination during gait in individuals post-anterior cruciate ligament reconstruction.
• Targeting movement control through biofeedback can potentially mitigate deleterious joint adaptations and reduce injury risk.
• This approach offers a promising strategy for enhancing rehabilitation outcomes and long-term joint health.