Positional relationship between leg rotation and lumbar spine during quiet standing

Area of Science:

• Biomechanics
• Spinal Health
• Orthopedics

Background:

• Clinical visual assessment of spinal posture, including lumbar lordosis, is common but often unreliable.
• Lumbar lordosis is crucial for spinal function, and changes are linked to gait abnormalities and hip joint issues.
• Previous research suggests hyperpronation affects pelvic alignment, indicating a kinematic chain from foot to pelvis.

Purpose of the Study:

• To investigate the effect of a pronated foot position on the lumbar region of the spine.
• To explore the relationship between foot posture and spinal sagittal contour.
• To quantify kinematic changes in the lumbar spine due to foot hyperpronation.

Main Methods:

• Utilized an optoelectronic movement analysis system for precise motion tracking.
• Focused on analyzing the lumbar region's response to induced pronated foot positions.
• Collected kinematic data to assess changes in spinal alignment.

Main Results:

• Pronated foot positions were observed to influence pelvic tilt and rotation.
• Significant alterations in lumbar lordosis were detected in response to foot hyperpronation.
• The study confirmed a kinematic link between foot posture and lumbar spine alignment.

Conclusions:

• Foot pronation is a significant factor influencing lumbar spine posture and sagittal contour.
• Understanding this foot-spine connection can inform clinical assessments and interventions for back pain.
• Optoelectronic analysis provides a reliable method for quantifying these biomechanical relationships.