Design and Development of a Portable Static Stability Training System

Abstract

This study presents a portable static stability training system that integrates a custom-built Inertial Measurement Unit, the Motion Signal Detection Device (MSDD), along with an interface program. It provides a cost-effective alternative to traditional force plates, which are expensive and restricted to laboratory use. The MSDD assesses body sway by analyzing acceleration data in three directions and offers real-Time feedback to enhance stability, making it suitable for sports training and rehabilitation. Data were collected from five young adult participants with the following mean demographic characteristics: Age 23 ± 1.22 years, height 167.8 ± 10.23 cm, weight 60.34 ± 10.58 kg, and BMI 21.28 ± 1.69. The study involved three postures: normal stance, single stance, and heel-To-Toe stance. To compare data from two different devices, including force plates (FP) and MSDD, data alignment was analyzed by comparing mean CoP velocities (FP) with sway velocities (MSDD) for each posture. The results indicated that the FP Center of Pressure (CoP) data and MSDD sway paths in the x and y directions exhibited similar trends. Consequently, the MSDD was integrated into the Portable Static Stability Training System for body sway measurement. The interface program, developed using Windows Forms App in Visual Studio 2022, improves usability by monitoring CoP and Base of Support. The principles of limited stability have been implemented to enhance balance control by restricting the center of pressure (CoP) and minimizing body sway within the base of support. The system enables customization of the sway path area limit, allowing for an appropriate challenge based on an individual's balance ability. When CoP exceeds stability limits, the system provides immediate feedback to prompt posture correction. This portable system bridges the gap between laboratory-based measurement tools and practical stability training.