[1] Statistics Bureau. The statistical handbook of japan 2021. https://www.stat.go.jp/english/data/handbook/index.html, 2021.
[2] Mitsuru Katagiri. Economic consequences of population aging in japan: Effects through changes in demand structure. The Singapore Economic Review, pages 1– 23, 2018.
[3] Cabinet Office Japan. Reiwasannenbankoureisyakaihakusyo (annual report on the ageing society). 2020.
[4] United Nations Department of Economic and Social Affairs. World population ageing 2020. https://www.un.org/development/desa/pd/news/world-population-ageing-2020-highlights, 2020.
[5] Shinya Matsuda, Keiji Muramatsu, and Kenshi Hayashida. Eligibility classification logic of the japanese long term care insurance. Asian Pacific Journal of Disease Management, 5(3):65–74, 2011. doi: 10.7223/apjdm.5.65.
[6] Paul C. LaStayo, Gordon A. Ewy, David D. Pierotti, Richard K. Johns, and Stan Lindstedt. The positive effects of negative work: Increased muscle strength and decreased fall risk in a frail elderly population. The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, 58(5):M419–M424, 2003.
[7] Fiona F. Stanaway, Danijela Gnjidic, Fiona M. Blyth, David G. Le Couteur, Vasi Naganathan, Louise Waite, Markus J. Seibel, David J. Handelsman, Philip N. Sam- brook, and Robert G. Cumming. How fast does the grim reaper walk? receiver operating characteristics curve analysis in healthy men aged 70 and over. BMJ, 343, 2011.
[8] Yves Lajoie and S. P. Gallagher. Predicting falls within the elderly community: comparison of postural sway, reaction time, the berg balance scale and the activities- specific balance confidence (abc) scale for comparing fallers and non-fallers. Archives of Gerontology and Geriatrics, 38(1):11–26, 2004.
[9] Judy A. Stevens and Elizabeth A. Phelan. Development of steadi: A fall prevention resource for health care providers. Health Promotion Practice, 14(5):706–714, 2013.
[10] Diane Podsiadlo and Sandra Richardson. The timed up & go: A test of basic functional mobility for frail elderly persons. Journal of the American Geriatrics Society, 39(2):142–148, 1991.
[11] S. Mathias, U. S. Nayak, and Bernard Isaacs. Balance in elderly patients: the” get- up and go” test. Archives of Physical Medicine and Rehabilitation, 67(6):387–389, 1986.
[12] Toshiaki Nakatani, Masakazu Nadamoto, Kan-Ichi Mimura, and Minoru Itoh. Vali- dation of a 30-sec chair-stand test for evaluating lower extremity muscle strength in japanese elderly adults. Japanese Society of Physical Education, 47:451–461, 2002.
[13] C. Jessie Jones, Roberta E. Rikli, and William C. Beam. A 30-s chair-stand test as a measure of lower body strength in community-residing older adults. Research Quarterly for Exercise and Sport, 70(2):113–119, 1999.
[14] Elizabeth A. Phelan, Jane E. Mahoney, Jan C. Voit, and Judy A. Stevens. As- sessment and management of fall risk in primary care settings. Medical Clinics of North America, 99(2):281–293, 2015.
[15] Patrick A. Forbes, Anthony Chen, and Jean S´ebastien Blouin. Sensorimotor con- trol of standing balance. Handbook of Clinical Neurology, 159:61–83, 2018. ISSN 22124152. doi: 10.1016/B978-0-444-63916-5.00004-5.
[16] Izumi Koizuka. Past and future of vestibular function testing caloric test. Equilib- rium Research, 78(4):288–294, 2019. doi: 10.3757/jser.78.288.
[17] J. James Collins and Carlo J. De Luca. The effects of visual input on open-loop and closed-loop postural control mechanisms. Experimental Brain Research, 103 (1):151–163, 1995.
[18] Maxime Billot, Grant A. Handrigan, Martin Simoneau, Philippe Corbeil, and Nor- mand Teasdale. Short term alteration of balance control after a reduction of plantar mechanoreceptor sensation through cooling. Neuroscience Letters, 535:40–44, 2013.
[19] Lorenz Assl¨ander and Robert J. Peterka. Sensory reweighting dynamics in human postural control. Journal of Neurophysiology, 111(9):1852–1864, 2014.
[20] Maurizio Schmid, Silvia Conforto, Daniele Bibbo, and Tommaso DAlessio. Res- piration and postural sway: detection of phase synchronizations and interactions. Human Movement Science, 23(2):105–119, 2004.
[21] Silvia Conforto, Maurizio Schmid, Valentina Camomilla, Tommaso D’Alessio, and Aurelio Cappozzo. Hemodynamics as a possible internal mechanical disturbance to balance. Gait and Posture, 14(1):28–35, 2001.
[22] Milo Kojic, Srboljub Mijailovic, and Neboja Zdravkovic. Modelling of muscle be- haviour by the finite element method using hill’s three-element model. International Journal for Numerical Methods in Engineering, 43(5):941–953, 1998.
[23] Ian D. Loram and Martin Lakie. Direct measurement of human ankle stiffness during quiet standing: the intrinsic mechanical stiffness is insufficient for stability. The Journal of Physiology, 545(3):1041–1053, 2002.
[24] Paul Davidovits. Physics in biology and medicine. Academic press, 2019.
[25] Itshak Melzer, Nissim Benjuya, Jacob Kaplanski, and Neil Alexander. Association between ankle muscle strength and limit of stability in older adults. Age and Ageing, 38(1):119–123, 2009.
[26] Keli Shen, Ahmed Chemori, and Mitsuhiro Hayashibe. Human-like balance recovery based on numerical model predictive control strategy. IEEE Access, 8:92050–92060, 2020.
[27] Roberta E. Rikli and C. Jessie Jones. Senior fitness test manual. Human kinetics, 2013.
[28] Erika Jonsson, Marketta Henriksson, and Helga Hirschfeld. Does the functional reach test reflect stability limits in elderly people? Journal of Rehabilitation Medicine, 35(1):26–30, 2003.
[29] Takehiro Michikawa, Yuji Nishiwaki, Toru Takebayashi, and Yoshiaki Toyama. One- leg standing test for elderly populations. Journal of Orthopaedic Science, 14(5): 675–685, 2009.
[30] Roberta E. Rikli and C. Jessie Jones. Development and validation of a functional fitness test for community-residing older adults. Journal of Aging and Physical Activity, 7(2):129–161, 1999.
[31] Irvin Hussein Lopez-Nava and Angelica Munoz-Melendez. Wearable inertial sensors for human motion analysis: A review. IEEE Sensors Journal, 16(22):7821–7834, 2016.
[32] Steffi L. Colyer, Murray Evans, Darren P. Cosker, and Aki I. T. Salo. A review of the evolution of vision-based motion analysis and the integration of advanced computer vision methods towards developing a markerless system. Sports Medicine- Open, 4(1):1–15, 2018.
[33] Yuta Tawaki, Takuichi Nishimura, and Toshiyuki Murakami. Monitoring of gait features during outdoor walking by simple foot mounted imu system. In IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, pages 3413–3418. IEEE, 2020.
[34] Akihiko Murai, Kosuke Kurosaki, Katsu Yamane, and Yoshihiko Nakamura. Musculoskeletal-see-through mirror: Computational modeling and algorithm for whole-body muscle activity visualization in real time. Progress in Biophysics and Molecular Biology, 103(2-3):310–317, 2010.
[35] Edward A. Clancy, Oljeta Bida, and Denis Rancourt. Influence of advanced electromyogram (emg) amplitude processors on emg-to-torque estimation during constant-posture, force-varying contractions. Journal of Biomechanics, 39(14): 2690–2698, 2006.
[36] YIN Yuehong, Yan Zeng, Xing Chen, and Yuanjie Fan. The internet of things in healthcare: An overview. Journal of Industrial Information Integration, 1:3–13, 2016.
[37] Tomoe Yoshida, Makoto Oda, Hirotaka Osafune, Mamiko Miyaji, and Masahiko Yamamoto. The evaluation of tracking ability by the body tracking test (btt). Equilibrium Research, 56(1):39–44, 1997.
[38] Yuta Tawaki and Toshiyuki Murakami. Exploring the relationship between center of pressure control agility and physical test. Japan Society of Functional Recovery Care and Power Rehabilitation, 13(2):68–75, 2019.
[39] Yasuyuki Suzuki, Akihiro Nakamura, Matija Milosevic, Kunihiko Nomura, Takao Tanahashi, Takuyuki Endo, Saburo Sakoda, Pietro Morasso, and Taishin Nomura. Postural instability via a loss of intermittent control in elderly and patients with parkinsons disease: A model-based and data-driven approach. Chaos: An Interdis- ciplinary Journal of Nonlinear Science, 30(11):113140, 2020.
[40] Luca Prosperini, Deborah Fortuna, Costanza Giann`ı, Laura Leonardi, Maria Rita Marchetti, and Carlo Pozzilli. Home-Based Balance Training Using the Wii Bal- ance Board: A Randomized, Crossover Pilot Study in Multiple Sclerosis. Neu- rorehabilitation and Neural Repair, 27(6):516–525, 2013. ISSN 15459683. doi: 10.1177/1545968313478484.
[41] Masatsugu Asai. International standardization in clinical stabilometryand problems in japan. Equilibrium Research, 75(3):135–141, 2016. doi: 10.3757/jser.75.135.
[42] David A. Winter. Biomechanics and Motor Control of Human Movement. John Wiley & Sons, 2009.
[43] Danik Lafond, Marcos Duarte, and Franois Prince. Comparison of three methods to estimate the center of mass during balance assessment. Journal of Biomechanics, 37(9):1421–1426, 2004.
[44] Tomohisa Yamamoto, Charles E. Smith, Yasuyuki Suzuki, Ken Kiyono, Takao Tanahashi, Saburo Sakoda, Pietro Morasso, and Taishin Nomura. Universal and individual characteristics of postural sway during quiet standing in healthy young adults. Physiological Reports, 3(3):1–24, 2015. ISSN 2051817X. doi: 10.14814/phy2.12329.
[45] Maciej Bosek, Bronis Grzegorzewski, and Andrzej Kowalczyk. Two-dimensional Langevin approach to the human stabilogram. Human Movement Science, 22(6): 649–660, 2004. ISSN 01679457. doi: 10.1016/j.humov.2004.02.005.
[46] Maciej Bosek. Model of two noise source dependent Ornstein-Uhlenbeck processes applied to postural sway. BioSystems, 94(3):282–284, 2008. ISSN 03032647. doi: 10.1016/j.biosystems.2008.06.013.
[47] Julia Gottschall, Joachim Peinke, Volker Lippens, and Volker Nagel. Exploring the dynamics of balance data - movement variability in terms of drift and diffusion. Physics Letters A, 373(8-9):811–816, 2009. ISSN 03759601. doi: 10.1016/j.physleta. 2008.12.026. URL http://dx.doi.org/10.1016/j.physleta.2008.12.026.
[48] Max J. Kurz, David J. Arpin, Brenda L. Davies, and Regina Harbourne. The Stochastic Component of the Postural Sway Variability is Higher in Children with Balance Impairments. Annals of Biomedical Engineering, 41(8):1703–1712, 2013. ISSN 00906964. doi: 10.1007/s10439-013-0821-7.
[49] Alice Nicola¨ı, Myrto Limnios, Alain Trouv´e, and Julien Audiffren. A Langevin- Based Model with Moving Posturographic Target to Quantify Postural Control. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 29:478–487, 2021. ISSN 15580210. doi: 10.1109/TNSRE.2021.3057257.
[50] Yuta Tawaki and Toshiyuki Murakami. Evaluation of Langevin Model for Human Stabilogram Based on Reproducibility of Statistical Indicators. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, pages 1934–1939, 2019. ISSN 1557170X. doi: 10.1109/EMBC.2019. 8857783.
[51] Yuta Tawaki, Takuichi Nishimura, and Toshiyuki Murakami. Verification of stochas- tic model for posturography. Japanese Journal of Clinical Biomechanics, 42:169– 176, 2021.
[52] Kei Masani, Albert H. Vette, and Milos R. Popovic. Controlling balance during quiet standing: Proportional and derivative controller generates preceding motor command to body sway position observed in experiments. Gait and Posture, 23(2): 164–172, 2006. ISSN 09666362. doi: 10.1016/j.gaitpost.2005.01.006.
[53] Thomas E. Prieto, Joel B. Myklebust, Raymond G. Hoffmann, Eric G. Lovett, and Barbara M. Myklebust. Measures of postural steadiness: Differences between healthy young and elderly adults. IEEE Transactions on Biomedical Engineering, 43(9):956–966, 1996. ISSN 00189294. doi: 10.1109/10.532130.
[54] Dingding Lin, Hyang Seol, Maury A. Nussbaum, and Michael L. Madigan. Relia- bility of COP-based postural sway measures and age-related differences. Gait and Posture, 28(2):337–342, 2008. ISSN 09666362. doi: 10.1016/j.gaitpost.2008.01.005.
[55] Alexander Ruhe, Ren´e Fejer, and Bruce Walker. The test-retest reliability of centre of pressure measures in bipedal static task conditions - A systematic review of the literature. Gait and Posture, 32(4):436–445, 2010. ISSN 09666362. doi: 10.1016/j. gaitpost.2010.09.012.
[56] Flavien Quijoux, Ali´enor Vienne-Jumeau, Franc¸ois Bertin-Hugault, Philippe Zaw- ieja, Marie Lef`evre, Pierre Paul Vidal, and Damien Ricard. Center of pressure dis- placement characteristics differentiate fall risk in older people: A systematic review with meta-analysis. Ageing Research Reviews, 62:101117, 2020. ISSN 18729649. doi: 10.1016/j.arr.2020.101117. URL https://doi.org/10.1016/j.arr.2020.101117.
[57] J. James Collins and Carlo J. De Luca. Open-loop and closed-loop control of posture : A random-walk analysis of center-of-pressure trajectories. Experimental Brain Research, 95(2):308–318, 1993.
[58] Manuel E. Hernandez, Joseph Snider, Cory Stevenson, Gert Cauwenberghs, and Howard Poizner. A Correlation-Based Framework for Evaluating Postural Control Stochastic Dynamics. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 24(5):551–561, 2016. ISSN 15344320. doi: 10.1109/TNSRE.2015. 2436344.
[59] Pilwon Hur, K. Alex Shorter, Prashant G. Mehta, and Elizabeth T. Hsiao-Wecksler. Invariant density analysis: Modeling and analysis of the postural control system using Markov chains. IEEE Transactions on Biomedical Engineering, 59(4):1094– 1100, 2012. ISSN 00189294. doi: 10.1109/TBME.2012.2184105.
[60] Damiana A. dos Santos, Claudiane A. Fukuchi, Reginaldo K. Fukuchi, and Marcos Duarte. A data set with kinematic and ground reaction forces of human balance. PeerJ, 5:e3626, 2017. ISSN 21678359. doi: 10.7717/peerj.3626.
[61] Mitesh Patel, Per-Anders Fransson, David Lush, and Stephen Gomez. The effect of foam surface properties on postural stability assessment while standing. Gait and Posture, 28(4):649–656, 2008. ISSN 09666362. doi: 10.1016/j.gaitpost.2008.04.018.
[62] Chisato Fujimoto, Toshihisa Murofushi, Yasuhiro Chihara, Munetaka Ushio, Keiko Sugasawa, Takuhiro Yamaguchi, Tatsuya Yamasoba, and Shinichi Iwasaki. As- sessment of diagnostic accuracy of foam posturography for peripheral vestibular disorders: Analysis of parameters related to visual and somatosensory dependence. Clinical Neurophysiology, 120(7):1408–1414, 2009. ISSN 13882457. doi: 10.1016/j. clinph.2009.05.002. URL http://dx.doi.org/10.1016/j.clinph.2009.05.002.
[63] Vicki L. Gray, Tanya D. Ivanova, and S. Jayne Garland. Reliability of center of pressure measures within and between sessions in individuals post-stroke and healthy controls. Gait and Posture, 40(1):198–203, 2014. ISSN 18792219. doi: 10.1016/j.gaitpost.2014.03.191. URL http://dx.doi.org/10.1016/j.gaitpost. 2014.03.191.
[64] Danuta Roman-Liu. Age-related changes in the range and velocity of postural sway. Archives of Gerontology and Geriatrics, 77:68–80, 2018. ISSN 18726976. doi: 10.1016/j.archger.2018.04.007. URL https://doi.org/10.1016/j.archger. 2018.04.007.
[65] Tsuyoshi Okawa, Takashi Tokita, Yasunari Shibata, Tetsuya Ogawa, and Hideo Miyata. Stabilometry Significance of Locus Length per Unit Area (L/A) in Patients with Equilibrium Disturbances. Equilibrium Research, 55(3):283–293, 1996.
[66] Fredrik Tjernstr¨om, M˚ans Bj¨orklund, and Eva-Maj Malmstr¨om. Romberg ratio in quiet stance posturographyTest to retest reliability. Gait and Posture, 42(1):27–31, 2015. ISSN 18792219. doi: 10.1016/j.gaitpost.2014.12.007.
[67] Marcos Duarte and Vladimir M. Zatsiorsky. Patterns of Center of Pressure Migra- tion during Prolonged Unconstrained Standing. Motor control, 3(1):12–27, 1999. ISSN 10871640. doi: 10.1123/mcj.3.1.12.
[68] Brian J. Benda, Patrick O. Riley, and David E. Krebs. Biomechanical Relation- ship Between Center of Gravity and Center of Pressure During Standing. IEEE Transactions on Rehabilitation Engineering, 2(1):3–10, 1994. ISSN 10636528. doi: 10.1109/86.296348.
[69] Olivier Caron, Bernard Faure, and Yvon Breni`ere. Estimating the centre of gravity of the body on the basis of the centre of pressure in standing pos- ture. Journal of Biomechanics, 30(11-12):1169–1171, 1997. ISSN 00219290. doi: 10.1016/S0021-9290(97)00094-8.
[70] Alessandra Bottaro, Youko Yasutake, Taishin Nomura, Maura Casadio, and Pietro Morasso. Bounded stability of the quiet standing posture: An intermittent control model. Human Movement Science, 27(3):473–495, 2008. ISSN 01679457. doi: 10.1016/j.humov.2007.11.005.
[71] Pietro Morasso, Amel Cherif, and Jacopo Zenzeri. Quiet standing: The Single Inverted Pendulum model is not so bad after all. PLOS ONE, 14(3):1–20, 2019. ISSN 19326203. doi: 10.1371/journal.pone.0213870.
[72] Hidenori Kimura and Jiang Yifa. A PID model of human balance keeping. IEEE Control Systems, 26(6):18–23, 2006. ISSN 1066033X. doi: 10.1109/MCS.2006. 252809.
[73] Yuta Tawaki, Takuichi Nishimura, and Toshiyuki Murakami. Linear Langevin- Based Models Providing Predictive Descriptive Statistics for Postural Sway. IEEE Access, 9:114485–114494, 2021. ISSN 21693536. doi: 10.1109/ACCESS.2021. 3104897.
[74] Damiana A. Santos and Marcos Duarte. A public data set of human balance eval- uations. PeerJ, 4:e2648, 2016. ISSN 21678359. doi: 10.7717/peerj.2648.
[75] Toshio Teranishi, Izumi Kondo, Shigeru Sonoda, Yosuke Wada, Hiroyuki Miyasaka, Genichi Tanino, Wataru Narita, Hiroaki Sakurai, Makoto Okada, and Eiichi Saitoh. Validity study of the standing test for imbalance and disequilibrium (SIDE): Is the amount of body sway in adopted postures consistent with item order? Gait and Posture, 34(3):295–299, 2011. ISSN 09666362. doi: 10.1016/j.gaitpost.2011.05.007. URL http://dx.doi.org/10.1016/j.gaitpost.2011.05.007.
[76] A. A. Nikooyan and A. A. Zadpoor. Mass–spring–damper modelling of the human body to study running and hopping – an overview. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 225(12): 1121–1135, 2011. ISSN 09544119. doi: 10.1177/0954411911424210.
[77] Peter J. Huber. Robust Estimation of a Location Parameter. The Annals of Mathematical Statistics, 35(1):73–101, 1964. ISSN 0003-4851. doi: 10.1214/aoms/1177703732.
[78] Kimiya Fujio and Yahiko Takeuchi. Discrimination of standing postures between young and elderly people based on center of pressure. Scientific Reports, 11:1–9, 2021. ISSN 20452322. doi: 10.1038/s41598-020-80717-z. URL https://doi.org/10.1038/s41598-020-80717-z.
[79] Bruce G. Marcot and Anca M. Hanea. What is an optimal value of k in k-fold cross- validation in discrete Bayesian network analysis? Computational Statistics, 36: 2009–2031, 2021. ISSN 16139658. doi: 10.1007/s00180-020-00999-9. URL https://doi.org/10.1007/s00180-020-00999-9.
[80] Anne Laure Boulesteix, Silke Janitza, Jochen Kruppa, and Inke R. K¨onig. Overview of random forest methodology and practical guidance with emphasis on com- putational biology and bioinformatics. Wiley Interdisciplinary Reviews: Data Mining and Knowledge Discovery, 2(6):493–507, 2012. ISSN 19424795. doi: 10.1002/widm.1072.
[81] Benjamin A. Goldstein, Eric C. Polley, and Farren B. S. Briggs. Random forests for genetic association studies. Statistical Applications in Genetics and Molecular Biology, 10(1), 2011.
[82] Roman Jaeschke, Gordon Guyatt, David Sackett, Gordon Guyatt, Eric Bass, Patrick Brill-Edwards, George Browman, Deborah Cook, Michael Farkouh, Hertzel Gerstein, Brian Haynes, Robert Hayward, Anne Holbrook, Elizabeth Juniper, Hui Lee, Mitchell Levine, Virginia Moyer, Jim Nishikawa, Andrew Oxman, Ameen Patel, John Philbrick, Scott Richardson, Stephane Sauve, David Sackett, Jack Sinclair, K. S. Trout, Peter Tugwell, Sean Tunis, Stephen Walter, and Mark Wilson. Users’ Guides to the Medical Literature: III. How to Use an Article About a Diagnostic Test B. What Are the Results and Will They Help Me in Caring for My Patients? JAMA, 271(9):703–707, 1994. ISSN 13676539. doi: doi:10.1001/jama.1994.03510330081039.
[83] Thanh Thuan Lˆe and Zo¨ı Kapoula. Role of ocular convergence in the Romberg quotient. Gait and Posture, 27(3):493–500, 2008. ISSN 09666362. doi: 10.1016/j. gaitpost.2007.06.003.
[84] Sandra M. S. F. Freitas, Silvana A. Wieczorek, Paulo H. Marchetti, and Marcos Duarte. Age-related changes in human postural control of prolonged standing. Gait and Posture, 22(4):322–330, 2005. ISSN 09666362. doi: 10.1016/j.gaitpost.2004.11.001.
[85] World Health Organization, World Health Organization. Ageing, and Life Course Unit. WHO global report on falls prevention in older age. World Health Organiza- tion, 2008.
[86] Yuta Tawaki and Toshiyuki Murakami. Exploring the relationship between center of pressure control agility and physical test. Japan Society of Functional Recovery Care and Power Rehabilitation, 13(2):68–75, 2019.
[87] Taeko Masumoto, Yosuke Yamada, Minoru Yamada, Tomoki Nakaya, Motoko Miyake, Yuya Watanabe, Tsukasa Yoshida, Keiichi Yokoyama, Emi Yamagata, Hi- nako Nanri, et al. Fall risk factors and sex differences among community-dwelling el- derly individuals in japan. a kameoka study. Nihon Koshu Eisei Zasshi (JAPANESE JOURNAL OF PUBLIC HEALTH), 62(8):390–401, 2015.
[88] Yasuyuki Suzuki, Taishin Nomura, Maura Casadio, and Pietro Morasso. Intermit- tent control with ankle, hip, and mixed strategies during quiet standing: a theoret- ical proposal based on a double inverted pendulum model. Journal of Theoretical Biology, 310:55–79, 2012.
[89] Taishin Nomura. Hitoseishiritsuishiseinoshinkeiseigyomoderu (neural control model of human quiet standing posture). The Brain & Neural Networks, 18(2):85–98, 2011. ISSN 1340-766X. doi: 10.3902/jnns.18.85.
[90] Albert H. Vette, Kei Masani, and Milos R. Popovic. Implementation of a Physio- logically Identified PD Feedback Controller for Regulating the Active Ankle Torque During Quiet Stance. 15(2):235–243, 2007.
[91] David A. Winter, Aftab E. Patla, Francois Prince, Milad Ishac, and Krystyna Gielo- perczak. Stiffness Control of Balance in Quiet Standing. Journal of Neurophysiology, 80(3):1211–1221, 1998. ISSN 00223077. doi: 10.1152/jn.1998.80.3.1211.
[92] Bruno J. Vellas, Sharon J. Wayne, Linda Romero, Richard N. Baumgartner, Lau- rence Z. Rubenstein, and Philip J. Garry. One-Leg Balance Is an Important Predic- tor of Injurious Falls in Older Persons. Journal of the American Geriatrics Society, 45(6):735–738, 1997. ISSN 00028614. doi: 10.1111/j.1532-5415.1997.tb01479.x.
[93] Hiroshi Nagasaki, Hajime Itoh, and Taketo Furuna. The structure underlying phys- ical performance measures for older adults in the community. Aging Clinical and Experimental Research, 7(6):451–458, 1995.
[94] H´el`ene Corriveau, R´ejean H´ebert, Fran¸cois Prince, and Michel Raˆıche. Postural control in the elderly: An analysis of test-retest and interrater reliability of the cop-com variable. Archives of Physical Medicine and Rehabilitation, 82(1):80–85, 2001.
[95] Robert J. Peterka. Sensorimotor integration in human postural control. Journal of Neurophysiology, 88(3):1097–1118, 2002.