Leg amputation side determines performance in curve sprinting: a case study on a Paralympic medalist

Area of Science:

• Biomechanics
• Sports Science
• Prosthetics

Background:

• Lower limb kinetics in amputee curve sprinting are poorly understood.
• Knowledge is crucial for prosthetic design and athlete classification.
• The impact of amputation side on performance remains unclear.

Purpose of the Study:

• To investigate the influence of amputation side on curve sprinting performance.
• To analyze lower limb kinematics and kinetics in unilateral amputee athletes.
• To compare clockwise and counter-clockwise curve sprinting.

Main Methods:

• Utilized a 3D motion analysis system (Vicon) and force plates (Kistler).
• Employed a modified mathematical human model (ALASKA).
• Analyzed a Paralympic medalist with a left-sided knee exarticulation amputation.

Main Results:

• Vertical ground reaction force and impulse were reduced when the affected limb was inside the curve.
• The unaffected limb exhibited altered joint mechanics compared to non-amputees.
• The unaffected limb may provide enhanced propulsion as the inside limb.

Conclusions:

• Curve sprinting biomechanics are highly dependent on the side of amputation relative to curve direction.
• Athletes' ability to achieve high radial velocities is influenced by amputation side.
• Findings are critical for optimizing performance in elite unilateral amputee sprinters.