Better Neutral: A Wearable Sound-Based Biofeedback System for Enhancing Pelvic Alignment in Pilates
DOI:
https://doi.org/10.4108/eetpht.11.10859Keywords:
Wearable IoT, Auditory biofeedback, Pilates, Pelvic alignment, Posture monitoring, Neutral Position, Somatic InteractionsAbstract
INTRODUCTION: This paper introduces *Better Neutral*, a low-cost wearable IoT system designed to enhance Pilates practice through sound-based biofeedback. The system aims to address the challenge of maintaining proper pelvic alignment—particularly during supine exercises where visual monitoring is limited—by providing intuitive auditory cues instead of visual or continuous corrective feedback.
OBJECTIVES: The main objective of this research is to develop and evaluate an embodied interaction system that promotes somatic awareness and self-correction through subtle, non-intrusive auditory feedback. The goal is to support practitioners in recognizing and adjusting pelvic alignment independently during Pilates sessions.
METHODS: The device employs a linear potentiometer to detect pelvic tilt and converts pressure variations into minimalist sound patterns. A user-specific calibration framework with adaptive thresholds ensures stable, individualized responses using commodity sensors. Grounded in soma design principles and informed by techniques derived from social network analysis, the system’s feedback design emphasizes interpretive engagement rather than prescriptive correction.
RESULTS: A preliminary study with four participants across eight Pilates sessions generated 19,200 seconds of sensor data and qualitative reflections. Findings indicate improved pelvic control, heightened somatic awareness, and perceived support for autonomous practice. Participants recognized the auditory cues as both informative and non-distracting.
CONCLUSION: This paper demonstrates how evocative sound feedback can foster embodied self-correction and engagement without overwhelming the user. This approach shows promise not only for Pilates practice but also for broader applications in posture training, rehabilitation, and preventive care.
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[1] Baweja HS, Patel BK, Martinkewiz JD, Vu J, Christou EA. Removal of visual feedback alters muscle activity and reduces force steadiness in older adults. Exp Brain Res. 2015;233(1):283–291.
[2] Barreiros J, Figueiredo T, Godinho M. Athletes’ retention of coaches’ instruction before competition. Int J Sports Sci Coach. 2013;8(3):641–653.
[3] Bortoli L, Bertollo M, Hanin Y, Robazza C. Striving for excellence: Attention, emotion, and mental energy. J Sport Psychol Action. 2014;5(3):179–193.
[4] Cowan N. The magical number 4 in short-term memory: A reconsideration of mental storage capacity. Behav Brain Sci. 2001;24(1):87–185.
[5] De Marchi T, Ferlito JV, Turra AC, Flamia S, de Bispo Magro F, Pavelecini Donida ML, Dilkin M, da Silva D, Massia Ribas V, Leal Junior ECP. Pilates method and/or photobiomodulation therapy combined to static magnetic field in women with stress urinary incontinence: A randomized, double-blind, placebo-controlled clinical trial. J Clin Med. 2023;12(3):1104.
[6] Dinh-Le C, Chuang R, Chokshi S, Mann D. Wearable health technology and its impact on wellness-related behavior. Digit Health. 2022;8:20552076221074265.
[7] Förstl N, Adler I, Süß F, Dendorfer S. Technologies for evaluation of pelvic floor functionality: A systematic review. Sensors (Basel). 2024;24(12):4001.
[8] Höök K, Caramiaux B, Erkut C, et al. Embracing first-person perspectives in soma-based design. Informatics. 2018;5(1):8.
[9] Kumar T, Kumar S, Nezamuddin M, Sharma VP. Efficacy of core muscle strengthening exercise in chronic low back pain patients. J Back Musculoskelet Rehabil. 2015;28(4):699–707.
[10] Nagata I, Murakami G, Suzuki D, Furuya K, Koyama M, Ohtsuka A. Histological features of the rectovaginal septum in elderly women and a proposal for posterior vaginal defect repair. Int Urogynecol J. 2007;18(7):863–868.
[11] Norton PA. Pelvic floor disorders: The role of fascia and ligaments. Clin Obstet Gynecol. 1993;36(4):926–938.
[12] Oberauer K. Working memory capacity limits memory for bindings. J Cogn. 2016;1(1):1–23.
[13] Ranaweera R, Attygalle S, Wachs J. Directional vibrotactile feedback for ergonomic posture correction in prolonged sitting. IEEE Trans Haptics. 2022;15(2):327–336.
[14] Roch M, Gaudreault N, Cyr M-P, Venne G, Bureau NJ, Morin M. The female pelvic floor fascia anatomy: A systematic search and review. Life (Basel). 2021;11(9):900.
[15] Song BH, Kim J. Effects of Pilates on pain, physical function, sleep quality, and psychological factors in young women with dysmenorrhea: A preliminary randomized controlled study. Healthcare (Basel). 2023;11(14):2076.
[16] Ståhl A, Löwgren J, Höök K. Evocative balance: Designing for interactional empowerment. Int J Des. 2014;8(1):43–57.
[17] Thibault-Gagnon S, Morin M. Active and passive components of pelvic floor muscle tone in women with provoked vestibulodynia: A perspective based on a review of the literature. J Sex Med. 2015;12(10):2178–2189.
[18] van der Kamp J, Masters R. Moving advertisements systematically affect gaze and performance in soccer penalty kicking. Front Sports Act Living. 2019;1:69.
[19] Wei JT, DeLancey JOL. Functional anatomy of the pelvic floor and lower urinary tract. Clin Obstet Gynecol. 2004;47(1):3–17.
[20] Zhang Z, Wang C, Wang J, Xu Y. A wearable posture correction system using IMU and vibrotactile feedback. Sensors (Basel). 2019;19(21):4707.
[21] Zhou J, et al. Smart wearable devices for posture monitoring: A systematic review. Sensors (Basel). 2023;23(1):223.
[22] Sweller J. Cognitive load theory. New York, NY: Springer; 2011.
[23] Albert H. Non-surgical treatment of patients with sciatica: A randomized clinical controlled trial. PhD thesis. University of Southern Denmark; 2004.
[24] Cerney AD. Experiences of postpartum women living with a pelvic floor disorder. Master’s thesis. Southern Illinois University Carbondale; 2014.
[25] Cruz S. The possible effects of Pilates on the alignment of a dancer’s body. Master’s thesis. University of Northern Colorado; 2018.
[26] Mills M. Analysis of pelvic alignment patterns utilizing the Postural Restoration Institute approach. Master’s thesis. West Chester University of Pennsylvania; 2022.
[27] Tan EJKW. Operative and diagnostic strategies in pelvic floor disease and incontinence. Doctoral thesis. Imperial College London; 2012.
[28] Jin H, He X, Wang L, Zhu Y, Jiang W, Zhou X. SitPose: Real-time detection of sitting posture and sedentary behavior using ensemble learning with depth sensor. arXiv preprint arXiv:2412.12216. 2024.
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