## 5 Conclusions and Suggestions
Drawing inspiration from this study, there is potential to create wearable sensors equipped with 3D accelerometers to monitor and enhance balance control. These sensors could offer visual feedback to aid elderly individuals or patients with neuromotor disease in improving their balance control. An inherent limitation of the method resides in the requirement for direct gaze upon the monitor screen, precluding simultaneous engagement in other activities during testing, which could be a potential source of fatigue and reduced concentration. In prospective research endeavors, the incorporation of audio warnings could supplant visual monitoring, affording individuals the freedom to engage in their preferred activities while using the computer, with timely audio cues signaling any departure from optimal head positioning. Another limitation of this study is the exclusive inclusion of female participants within a restricted age range. Additionally, the absence of follow-up sessions to track the treatment's continued impact after the end of visual feedback represents another constraint. An accurate comparison between the cost of the proposed design and existing products proves challenging due to several factors. These include the presence of distinct elements and components, as well as the differing levels of confidence perceived by users. The proposed design primarily serves as a prototype aimed at materializing the concept into a small and affordable solution specifically tailored for research purposes. As such, this design is positioned as a cost-effective device concerning a number of elements, such as sensor and controller, which are available with an affordable price, and the simple program, which was already converted into Python language to reduce the cost of the Matlab software. Envisioning the future, these metrics could be transmitted to specialized centers via internet connectivity, obviating the need for patients to bear travel expenses and reducing the demand on specialists' time. Consequently, this holds the potential to curtail the overall cost of treatment, constituting a promising avenue for the advancement of healthcare delivery. An additional proposal within this domain pertains to the ubiquity of contemporary smartphones, all of which are endowed with sophisticated motion sensors. These cutting-edge motion sensors, integral components of today's smartphones, proffer a compelling opportunity for the creation of a visual feedback system designed to discern and analyze precise user movements. This system can be ingeniously devised to provide instantaneous real-time audio visual feedback to the user should such guidance be deemed requisite. Such an initiative would leverage the existing technological infrastructure of smartphones to foster a novel paradigm in user-directed visual feedback, thereby harnessing the vast potential of mobile devices in the realm of healthcare and self-improvement. For future endeavors, it is crucial to track the long term impact of visual feedback. Additionally, exploring the option of delivering 3D auditory feedback through a headset could be beneficial. Headsets equipped with sensors to monitor head position could offer a potential solution akin to other wearable devices, helping to prevent head positions that might lead to health issues. Conceptualization: M.E.A. ; Methodology: M.E.A. ; Validation: M.E.A. and A.J.M. ; Investigation: M.E.A., A.J.M. and B.L. ; Data curation: M.E.A., A.J.M. and B.L. ; Writing--original draft: M.E.A., A.J.M. and B.L. ; Writing--review and editing: M.E.A. and A.J.M. ; Visualization: M.E.A. and A.J.M. ; Administration: M.E.A. and A.J.M. ; Supervision: M.E.A. ; Project administration: M.E.A., A.J.M. and B.L. ; Funding acquisition: M.E.A. and A.J.M. All authors have read and agreed to the published version of the manuscript. This work was supported by Jiangxi University of Science and Technology, 341000, Ganzhou, China, under funding number 2021205200100563. Not applicable. The data are available upon the request.