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A Vibrotactile Feedback Device for Seated Balance Assessment and Training

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Wearable Smartphone-Based Multisensory Feedback System for Torso Posture Correction: Iterative Design and

Amanda Polin Pereira¹, Olibario Jose Machado Neto², Valeria Meirelles Carril Elui¹

¹Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto SP, Brazil.

|January 22, 2025

Summary

The Postural SmartVest wearable device uses smartphone sensors to provide real-time feedback, significantly improving posture awareness and aiding stroke rehabilitation by helping patients maintain optimal body alignment during exercises.

Keywords:

digital health digital intervention digital technology gerontology mHealth mobile health multisensory feedback postural balance posture smartphone stroke stroke rehabilitation wearable technology

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Area of Science:

Biomedical Engineering
Rehabilitation Technology
Wearable Sensors

Background:

Stroke frequently causes sensorimotor deficits, including hemiparesis, impacting balance and posture.
Post-stroke patients require torso stabilization exercises, but maintaining correct posture is difficult due to neurological impairments.

Purpose of the Study:

To develop the Postural SmartVest, an affordable wearable technology for monitoring and improving posture in stroke survivors.
To provide real-time, multisensory feedback to guide patients toward their best possible posture during rehabilitation.

Main Methods:

Iterative prototype development involving therapist input and feasibility/pilot studies.
Kinematic assessment using the Vicon Gait Plug-in system.
Within-subject experiment with poststroke patients and therapists evaluating the device during daily activities and exercises.

Main Results:

The Postural SmartVest integrates a smartphone app with a compression tank top, using accelerometers for posture monitoring.
Multisensory feedback (audio, vibration, color) significantly improved patients' ability to achieve and maintain optimal posture (P<.001).
High patient satisfaction reported for comfort, usability, and effectiveness; therapists noted positive impacts on rehabilitation.

Conclusions:

The Postural SmartVest is an effective tool for enhancing posture awareness in poststroke patients.
The device supports therapists in guiding patients toward improved postural control during rehabilitation sessions.