Repeatability in the assessment of multi-segment foot kinematics

Area of Science:

• Biomechanics
• Orthopedics
• Clinical Gait Analysis

Background:

• Systematic reviews highlight a lack of repeatability studies for 3D multi-segment foot models, hindering clinical decision-making.
• The Leardini et al. [10] 3D foot model is a recent development requiring validation for clinical use.

Purpose of the Study:

• To assess the repeatability of the Leardini et al. [10] 3D multi-segment foot model.
• To evaluate the influence of therapist experience on the repeatability of foot kinematic measurements.

Main Methods:

• Repeated-measures design analyzing foot kinematics in six healthy adults.
• Involved two therapists with varying experience levels across four test sessions.
• Measured within-day and between-day variability for relative 3D rotations and absolute angles.

Main Results:

• Moderate to good repeatability was observed for most parameters.
• Junior clinicians showed higher within- and between-day variability compared to senior clinicians.
• Inter-therapist variability was notable, particularly for absolute angles.

Conclusions:

• The Leardini et al. [10] 3D foot model demonstrates adequate repeatability for establishing normative databases in gait laboratories.
• Therapist experience is a critical factor influencing measurement variability.
• Gait laboratories should invest in comprehensive clinician training to ensure reliable foot kinematic data.