An insole pressure measurement system: repeatability of postural data.

Area of Science:

• Biomechanics
• Human Movement Science
• Clinical Measurement

Background:

• Postural sway is a key indicator of balance and stability.
• Accurate measurement of postural sway is crucial for clinical assessment and rehabilitation.
• Existing methods for measuring postural sway have limitations in terms of repeatability and clinical applicability.

Purpose of the Study:

• To evaluate the repeatability of an in-shoe plantar pressure measurement system for postural sway data.
• To assess the system's reliability in both healthy individuals and patients with clinical balance deficiencies.
• To determine the clinical utility of this technology for balance assessment.

Main Methods:

• Participants (9 healthy, 5 clinical) underwent quiet stance trials with an in-shoe plantar pressure system.
• Data were collected over multiple sessions/days to assess intrasubject reliability.
• Nine response variables were analyzed using the Kerlinger reliability procedure.

Main Results:

• Direct system outputs showed high repeatability (r=0.95-0.98) across left and right feet.
• Calculated variables from raw data demonstrated moderate to good repeatability (r=0.65-0.77).
• The system provided highly reproducible postural sway parameters.

Conclusions:

• In-shoe plantar pressure measurement systems offer a reliable method for assessing postural sway.
• The high repeatability of the system supports its use in clinical settings for balance assessment.
• This technology can enhance clinician confidence in managing patients with balance impairments.