The Influence of Induced Head Acceleration on Lower-Extremity Biomechanics during a Cutting Task

Area of Science:

• Sports Medicine
• Biomechanics
• Neurology

Background:

• Sports-related concussions result from head impacts causing brain movement.
• Athletes with concussion history exhibit altered lower-extremity biomechanics, increasing injury risk.
• The specific impact of head acceleration on lower-extremity landing biomechanics remains unclear.

Purpose of the Study:

• To investigate the influence of induced head acceleration on lower-extremity biomechanics during landing tasks.
• To compare head acceleration and landing kinematics between vertical and lateral hopping interventions.
• To assess changes in lower-extremity biomechanics pre- and post-hopping intervention.

Main Methods:

• Twenty participants were divided into vertical and lateral hopping groups.
• Participants performed land-and-cut maneuvers before and after a hopping intervention.
• Vertical head acceleration was measured using an accelerometer; kinematic and kinetic variables were analyzed.

Main Results:

• The vertical hopping group experienced significantly greater vertical head acceleration than the lateral hopping group (p=0.04).
• Post-intervention, the vertical hopping group showed significantly greater knee abduction angles during landing compared to the lateral hopping group (p<0.000).
• Induced head acceleration through hopping influenced lower-extremity biomechanics during landing.

Conclusions:

• Continuous hopping can induce head acceleration, impacting lower-extremity biomechanics.
• Vertical hopping leads to greater head acceleration and knee abduction, potentially increasing injury risk.
• Further research is needed to understand the implications for sports-related concussion and injury prevention.