{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,3]],"date-time":"2026-04-03T04:13:02Z","timestamp":1775189582256,"version":"3.50.1"},"reference-count":38,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2018,4,21]],"date-time":"2018-04-21T00:00:00Z","timestamp":1524268800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000038","name":"Natural Sciences and Engineering Research Council of Canada","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ontario Ministry of Training, Colleges and Universities"},{"DOI":"10.13039\/501100004490","name":"University of Waterloo","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004490","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Wearable sensors could facilitate point of care, clinically feasible assessments of dynamic stability and associated fall risk through an assessment of single-task (ST) and dual-task (DT) walking. This study investigated gait changes between ST and DT walking and between older adult prospective fallers and non-fallers. The results were compared to a study based on retrospective fall occurrence. Seventy-five individuals (75.2 \u00b1 6.6 years; 47 non-fallers, 28 fallers; 6 month prospective fall occurrence) walked 7.62 m under ST and DT conditions while wearing pressure-sensing insoles and accelerometers at the head, pelvis, and on both shanks. DT-induced gait changes included changes in temporal measures, centre of pressure (CoP) path stance deviations and coefficient of variation, acceleration descriptive statistics, Fast Fourier Transform (FFT) first quartile, ratio of even to odd harmonics, and maximum Lyapunov exponent. Compared to non-fallers, prospective fallers had significantly lower DT anterior\u2013posterior CoP path stance coefficient of variation, DT head anterior\u2013posterior FFT first quartile, ST left shank medial\u2013lateral FFT first quartile, and ST right shank superior maximum acceleration. DT-induced gait changes were consistent regardless of faller status or when the fall occurred (retrospective or prospective). Gait differences between fallers and non-fallers were dependent on retrospective or prospective faller identification.<\/jats:p>","DOI":"10.3390\/s18041275","type":"journal-article","created":{"date-parts":[[2018,4,24]],"date-time":"2018-04-24T04:44:48Z","timestamp":1524545088000},"page":"1275","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Dual-Task Elderly Gait of Prospective Fallers and Non-Fallers: A Wearable-Sensor Based Analysis"],"prefix":"10.3390","volume":"18","author":[{"given":"Jennifer","family":"Howcroft","sequence":"first","affiliation":[{"name":"Department of Systems Design Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4693-2623","authenticated-orcid":false,"given":"Edward","family":"Lemaire","sequence":"additional","affiliation":[{"name":"Centre for Rehabilitation Research and Development, Ottawa Hospital Research Institute, Ottawa, ON K1H 8M2, Canada"},{"name":"Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada"}]},{"given":"Jonathan","family":"Kofman","sequence":"additional","affiliation":[{"name":"Department of Systems Design Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada"}]},{"given":"William","family":"McIlroy","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, University of Waterloo, Waterloo, ON N2L 3G1, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2018,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Lamoth, C.J., van Deudekom, F.J., van Campen, J.P., Appels, B.A., de Vries, O.J., and Pijnappels, M. (2011). Gait stability and variability measures show effects of impaired cognition and dual tasking in frail people. J. Neuroeng. Rehabil., 8.","DOI":"10.1186\/1743-0003-8-2"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1335","DOI":"10.1093\/gerona\/63.12.1335","article-title":"Dual-task decrements in gait: Contributing factors among healthy older adults","volume":"63A","author":"Hausdorff","year":"2008","journal-title":"J. Gerontol. A Biol. Sci. Med. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1415","DOI":"10.1093\/gerona\/glu155","article-title":"The motor signature of mild cognitive impairment: Results from the gait and brain study","volume":"69","author":"Speechley","year":"2014","journal-title":"J. Gerontol. A Biol. Sci. Med. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Priest, A.W., Salamon, K.B., and Hollman, J.H. (2008). Age-related differences in dual task walking: A cross sectional study. J. Neuroeng. Rehabil., 5.","DOI":"10.1186\/1743-0003-5-29"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0966-6362(01)00156-4","article-title":"Attention and the control of posture and gait: A review of an emerging area of research","volume":"16","author":"Woollacott","year":"2002","journal-title":"Gait Posture"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2409","DOI":"10.1007\/s00198-012-1992-z","article-title":"Examining the relationship between specific cognitive processes and falls risk in older adults: A systematic review","volume":"23","author":"Hsu","year":"2012","journal-title":"Osteoporos. Int."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Bock, O., and Beurskens, R. (2011). Effect of visual distractors on the gait of elderly versus young persons. Curr. Gerontol. Geriatr.","DOI":"10.1155\/2011\/651718"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"190","DOI":"10.1016\/j.gaitpost.2010.10.095","article-title":"Age-related deficits of dual-task walking: the role of foot vision","volume":"33","author":"Bock","year":"2011","journal-title":"Gait Posture"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"950","DOI":"10.1002\/mds.20848","article-title":"Dual-tasking effects on gait variability: The role of aging, falls, and executive function","volume":"21","author":"Springer","year":"2006","journal-title":"Mov. Disord."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"580","DOI":"10.1007\/s00415-012-6683-3","article-title":"Characterization of cognitive and motor performance during dual-tasking in healthy older adults and patients with Parkinson\u2019s disease","volume":"260","author":"Wild","year":"2013","journal-title":"J. Neurol."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Howcroft, J., Lemaire, E.D., Kofman, J., and McIlroy, W.E. (2014, January 26\u201330). Analysis of dual-task elderly gait using wearable plantar-pressure insoles and accelerometer. Proceedings of the 36th Annual International Conference of the IEEE EMBS, Chicago, IL, USA.","DOI":"10.1109\/EMBC.2014.6944748"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"992","DOI":"10.1016\/j.jbiomech.2016.01.015","article-title":"Analysis of dual-task elderly gait in fallers and non-fallers using wearable sensors","volume":"49","author":"Howcroft","year":"2016","journal-title":"J. Biomech."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1016\/j.gaitpost.2010.12.012","article-title":"Lifespan changes in multi-tasking: Concurrent walking and memory search in children, young, and older adults","volume":"33","author":"Krampe","year":"2011","journal-title":"Gait Posture"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.arr.2014.06.001","article-title":"Single and dual task tests of gait speed are equivalent in the prediction of falls in older people: A systematic review and meta-analysis","volume":"16","author":"Menant","year":"2014","journal-title":"Ageing Res. Rev."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1016\/j.physio.2015.04.011","article-title":"Dual-task testing to predict falls in community-dwelling older adults: A systematic review","volume":"102","author":"Wittwer","year":"2016","journal-title":"Physiotherapy"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"570","DOI":"10.1111\/j.1532-5415.2007.01147.x","article-title":"Multitasking: Association between poorer performance and a history of recurrent falls","volume":"55","author":"Faulkner","year":"2007","journal-title":"J. Am. Geriatr. Soc."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1572","DOI":"10.1046\/j.1532-5415.2002.50415.x","article-title":"Validity of divided attention tasks in predicting falls in older individuals: A preliminary study","volume":"50","author":"Verghese","year":"2002","journal-title":"J. Am. Geriatr. Soc."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1265","DOI":"10.1111\/j.1532-5415.2008.01766.x","article-title":"Recurrent falls and dual task-related decrease in walking speed: Is there a relationship?","volume":"56","author":"Beauchet","year":"2008","journal-title":"J. Am. Geriatr. Soc."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1016\/j.apmr.2013.07.027","article-title":"Validity of simple gait-related dual-task tests in predicting falls in community-dwelling older adults","volume":"95","author":"Muhaidat","year":"2014","journal-title":"Arch. Phys. Med. Rehabil."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1086","DOI":"10.1093\/gerona\/glq077","article-title":"Executive control deficits as a prodrome to falls in healthy older adults: A prospective study linking thinking, walking, and falling","volume":"65A","author":"Herman","year":"2010","journal-title":"J. Gerontol. A Biol. Sci. Med. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Mirelman, A., Herman, T., Brozgol, M., Dorfman, M., Sprecher, E., Schweiger, A., Giladi, N., and Hausdorff, J.M. (2012). Executive function and falls in older adults: New findings from a five-year prospective study link fall risk to cognition. PLoS ONE, 7.","DOI":"10.1371\/journal.pone.0040297"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1007\/BF03324758","article-title":"Gait variability while dual-tasking: Fall predictor in older inpatients?","volume":"20","author":"Kressig","year":"2008","journal-title":"Aging Clin. Exp. Res."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1016\/j.gaitpost.2010.03.012","article-title":"Changes in step-width during dual-task walking predicts falls","volume":"32","author":"Nordin","year":"2010","journal-title":"Gait Posture"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1159\/000127318","article-title":"Does change in gait while counting backward predict the occurrence of a first fall in older adults?","volume":"54","author":"Beauchet","year":"2008","journal-title":"Gerontology"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1466","DOI":"10.1046\/j.1532-5415.2003.51468.x","article-title":"Walking and talking as predictors of falls in the general population: The Leiden 85-plus study","volume":"51","author":"Gussekloo","year":"2003","journal-title":"J. Am. Geriatr. Soc."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Howcroft, J., Kofman, J., and Lemaire, E.D. (2013). Review of fall risk assessment in geriatric populations using inertial sensors. J. Neuroeng. Rehabil., 10.","DOI":"10.1186\/1743-0003-10-91"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"608","DOI":"10.1093\/gerona\/glu225","article-title":"Ambulatory fall-risk assessment: Amount and quality of daily-life gait predict falls in older adults","volume":"70","author":"Pijnappels","year":"2015","journal-title":"J. Gerontol. A Biol. Sci. Med. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1016\/j.gaitpost.2014.09.006","article-title":"How fear of falling can increase fall-risk in older adults: Applying psychological theory to practical observations","volume":"41","author":"Young","year":"2015","journal-title":"Gait Posture"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1056\/NEJM198301273080401","article-title":"Intensive immunosuppression in progressive multiple sclerosis. A randomized, three-arm study of high-dose intravenous cyclophosphamide, plasma exchange, and ACTH","volume":"308","author":"Hauser","year":"1983","journal-title":"N. Engl. J. Med."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1701","DOI":"10.1056\/NEJM198812293192604","article-title":"Risk factors for falls among elderly persons living in the community","volume":"319","author":"Tinetti","year":"1988","journal-title":"N. Eng. J. Med."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1812","DOI":"10.1109\/TNSRE.2017.2687100","article-title":"Prospective fall-risk prediction models for older adults based on wearable sensors","volume":"25","author":"Howcroft","year":"2017","journal-title":"IEEE Trans. Neural. Syst. Rehabil. Eng."},{"key":"ref_32","unstructured":"Howcroft, J., Lemaire, E.D., and Kofman, J. (2018, April 19). Wearable sensor (accelerometer, pressure sensing insole) gait data of older adults\u2014Update with prospective falls. Available online: https:\/\/dataverse.scholarsportal.info\/dataset.xhtml?persistentId=doi:10.5683\/SP\/VST2RC."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"320","DOI":"10.1016\/j.bspc.2018.03.005","article-title":"Prospective elderly fall prediction by older-adult fall-risk modeling with feature selection","volume":"43","author":"Howcroft","year":"2018","journal-title":"Biomed. Signal Process. Control"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1037\/0894-4105.16.3.309","article-title":"Commonalities and differences in the working memory components underlying letter and category fluency tasks: A dual-task investigation","volume":"16","author":"Rende","year":"2002","journal-title":"Neuropsychology"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1111\/j.2517-6161.1995.tb02031.x","article-title":"Controlling the false discovery rate: A practical and powerful approach to multiple testing","volume":"57","author":"Benjamini","year":"1995","journal-title":"J. R. Stat. Soc. Ser. B"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Howcroft, J., Lemaire, E.D., and Kofman, J. (2016). Wearable-sensor-based classification models of faller status in older adults. PLoS ONE, 11.","DOI":"10.1371\/journal.pone.0153240"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1093\/ageing\/26.1.15","article-title":"Comfortable and maximum walking speed of adults aged 20\u201379 years: Reference values and determinants","volume":"26","author":"Bohannon","year":"1997","journal-title":"Age Ageing"},{"key":"ref_38","unstructured":"Stergiou, N. (2004). Nonlinear tools in human movement. Innovative Analyses of Human Movement: Analytical Tools for Human Movement Research, Human Kinetics."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/4\/1275\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:01:34Z","timestamp":1760194894000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/4\/1275"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,4,21]]},"references-count":38,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2018,4]]}},"alternative-id":["s18041275"],"URL":"https:\/\/doi.org\/10.3390\/s18041275","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,4,21]]}}}