Prophylactic ankle bracing reduces rearfoot motion during sudden inversion

Area of Science:

• Biomechanics
• Sports Medicine
• Orthopedics

Background:

• Ankle sprains are common injuries, often resulting from sudden inversion.
• Ankle braces are widely used to prevent or manage ankle injuries.
• Understanding the biomechanical effects of different brace types is crucial for injury prevention.

Purpose of the Study:

• To compare the effectiveness of semi-rigid and lace-up ankle braces.
• To quantify the impact of bracing on rearfoot motion during inversion.
• To evaluate ankle brace efficacy in limiting angular displacement and velocity.

Main Methods:

• A 1x3 factorial design study involving 24 healthy volunteers.
• Measurement of rearfoot angular displacement and velocity using a motion analysis system.
• Comparison of three ankle brace conditions: semi-rigid, lace-up, and control.

Main Results:

• Semi-rigid braces significantly reduced rearfoot angular displacement and velocity compared to lace-up and control conditions.
• Lace-up braces also showed significant reductions compared to the control condition.
• Both brace types demonstrated effectiveness in limiting rearfoot motion during inversion.

Conclusions:

• Semi-rigid ankle braces provide superior restriction of rearfoot motion compared to lace-up braces.
• Lace-up braces offer significant biomechanical advantages over no ankle support.
• Ankle bracing is an effective strategy for limiting potentially injurious rearfoot movements.