Validity of Wearable Gait Analysis System for Measuring Lower-Limb Kinematics during Timed Up and Go Test

Area of Science:

• Biomechanics
• Kinesiology
• Wearable Technology

Background:

• Limited research exists on sensor-based lower-limb kinematics during the Timed Up and Go (TUG) test.
• Accurate kinematic assessment is crucial for evaluating mobility and fall risk.

Purpose of the Study:

• To determine the validity of a wearable gait sensor system for assessing lower-limb kinematics during the TUG test.
• To compare sensor-based kinematic data with a standard optical motion analysis system.

Main Methods:

• Ten healthy young participants performed the TUG test.
• Lower-limb kinematics were simultaneously recorded using a wearable gait sensor system and an optical motion analysis system.
• Angular velocities, peak angles, and ranges of motion for hip, knee, and ankle joints were analyzed.

Main Results:

• Significant correlations were found between the wearable sensor system and optical system for joint angular velocities during sit-to-stand and turn-to-sit phases (R = 0.612-0.937).
• Correlations were also observed for peak joint angles and ranges of motion during walking phases (R = 0.528-0.924).
• High agreement between systems indicates reliable kinematic measurements.

Conclusions:

• The wearable gait sensor system demonstrates validity for evaluating lower-limb kinematics during the TUG test.
• This technology offers a practical and reliable method for assessing mobility-related kinematics beyond standard gait analysis.
• Wearable sensors can be effectively utilized in clinical and research settings for TUG test assessments.