{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:56:42Z","timestamp":1760147802503,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,3,5]],"date-time":"2023-03-05T00:00:00Z","timestamp":1677974400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["P20 GM109090","#I21RX003294","016.Vidi.178.014"],"award-info":[{"award-number":["P20 GM109090","#I21RX003294","016.Vidi.178.014"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000738","name":"United States (US) Department of Veterans Affairs","doi-asserted-by":"publisher","award":["P20 GM109090","#I21RX003294","016.Vidi.178.014"],"award-info":[{"award-number":["P20 GM109090","#I21RX003294","016.Vidi.178.014"]}],"id":[{"id":"10.13039\/100000738","id-type":"DOI","asserted-by":"publisher"}]},{"name":"etherlands Organization for Scientific Research (NWO)","award":["P20 GM109090","#I21RX003294","016.Vidi.178.014"],"award-info":[{"award-number":["P20 GM109090","#I21RX003294","016.Vidi.178.014"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Response to challenging situations is important to avoid falls, especially after medial perturbations, which require active control. There is a lack of evidence on the relationship between the trunk\u2019s motion in response to perturbations and gait stability. Eighteen healthy adults walked on a treadmill at three speeds while receiving perturbations of three magnitudes. Medial perturbations were applied by translating the walking platform to the right at left heel contact. Trunk velocity changes in response to the perturbation were calculated and divided into the initial and the recovery phases. Gait stability after a perturbation was assessed using the margin of stability (MOS) at the first heel contact, MOS mean, and standard deviation for the first five strides after the perturbation onset. Faster speed and smaller perturbations led to a lower deviation of trunk velocity from the steady state, which can be interpreted as an improvement in response to the perturbation. Recovery was quicker after small perturbations. The MOS mean was associated with the trunk\u2019s motion in response to perturbations during the initial phase. Increasing walking speed may increase resistance to perturbations, while increasing the magnitude of perturbation leads to greater trunk motions. MOS is a useful marker of resistance to perturbations.<\/jats:p>","DOI":"10.3390\/s23052833","type":"journal-article","created":{"date-parts":[[2023,3,6]],"date-time":"2023-03-06T02:28:34Z","timestamp":1678069714000},"page":"2833","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Trunk Velocity Changes in Response to Physical Perturbations Are Potential Indicators of Gait Stability"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4210-2131","authenticated-orcid":false,"given":"Farahnaz","family":"Fallahtafti","sequence":"first","affiliation":[{"name":"Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE 68182, USA"},{"name":"VA Nebraska-Western Iowa Health Care System, Department of Veterans\u2019 Affairs, Omaha, NE 68105, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0290-2131","authenticated-orcid":false,"given":"Sjoerd","family":"Bruijn","sequence":"additional","affiliation":[{"name":"Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands"}]},{"given":"Arash","family":"Mohammadzadeh Gonabadi","sequence":"additional","affiliation":[{"name":"Institute for Rehabilitation Science and Engineering, Madonna Rehabilitation Hospitals, Lincoln, NE 68506, USA"}]},{"given":"Mohammad","family":"Sangtarashan","sequence":"additional","affiliation":[{"name":"Department of Industrial Engineering, Amirkabir University of Technology, Tehran 15875, Iran"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1121-8120","authenticated-orcid":false,"given":"Julie Blaskewicz","family":"Boron","sequence":"additional","affiliation":[{"name":"Department of Gerontology, University of Nebraska at Omaha, Omaha, NE 68182, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5394-4628","authenticated-orcid":false,"given":"Carolin","family":"Curtze","sequence":"additional","affiliation":[{"name":"Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE 68182, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6968-5760","authenticated-orcid":false,"given":"Ka-Chun","family":"Siu","sequence":"additional","affiliation":[{"name":"Department of Health & Rehabilitation Sciences, Physical Therapy Program, University of Nebraska Medical Center, Omaha, NE 68198, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2934-2624","authenticated-orcid":false,"given":"Sara A.","family":"Myers","sequence":"additional","affiliation":[{"name":"Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE 68182, USA"},{"name":"VA Nebraska-Western Iowa Health Care System, Department of Veterans\u2019 Affairs, Omaha, NE 68105, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6550-7759","authenticated-orcid":false,"given":"Jennifer","family":"Yentes","sequence":"additional","affiliation":[{"name":"Department of Health & Rehabilitation Sciences, Physical Therapy Program, University of Nebraska Medical Center, Omaha, NE 68198, USA"},{"name":"Department of Health & Kinesiology, Texas A&M University, College Station, TX 77843, USA"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1007\/s11914-008-0026-4","article-title":"Falls: Epidemiology, pathophysiology, and relationship to fracture","volume":"6","author":"Berry","year":"2008","journal-title":"Curr. Osteoporos. Rep."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Madehkhaksar, F., Klenk, J., Sczuka, K., Gordt, K., Melzer, I., and Schwenk, M. (2018). The effects of unexpected mechanical perturbations during treadmill walking on spatiotemporal gait parameters, and the dynamic stability measures by which to quantify postural response. PLoS ONE, 13.","DOI":"10.1371\/journal.pone.0195902"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1411","DOI":"10.1152\/jn.00131.2009","article-title":"Direction-dependent control of balance during walking and standing","volume":"102","author":"Kuo","year":"2009","journal-title":"J. Neurophysiol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"288","DOI":"10.1080\/00222895.2016.1204262","article-title":"Stepping responses in young and older adults following a perturbation to the support surface during gait","volume":"49","author":"McIntosh","year":"2017","journal-title":"J. Mot. Behav."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"110213","DOI":"10.1016\/j.jbiomech.2020.110213","article-title":"Biomechanical response to mediolateral foot-placement perturbations during walking","volume":"116","author":"Brough","year":"2021","journal-title":"J. Biomech."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"20120999","DOI":"10.1098\/rsif.2012.0999","article-title":"Assessing the stability of human locomotion: A review of current measures","volume":"10","author":"Bruijn","year":"2013","journal-title":"J. R. Soc. Interface"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"3945","DOI":"10.1242\/jeb.045112","article-title":"The effects of arm swing on human gait stability","volume":"213","author":"Bruijn","year":"2010","journal-title":"J. Exp. Biol."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Gerards, M.H., Meijer, K., Karamanidis, K., Grevendonk, L., Hoeks, J., Lenssen, A.F., and McCrum, C. (2021). Adaptability to balance perturbations during walking as a potential marker of falls history in older adults. Front. Sport. Act. Living, 3.","DOI":"10.3389\/fspor.2021.682861"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1123\/kr.2017-0053","article-title":"Strategies for the control of balance during locomotion","volume":"7","author":"Hendrik","year":"2018","journal-title":"Kinesiol. Rev."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2175","DOI":"10.1113\/JP272614","article-title":"Rapid limb-specific modulation of vestibular contributions to ankle muscle activity during locomotion","volume":"595","author":"Forbes","year":"2017","journal-title":"J. Physiol."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Shirota, C., Simon, A.M., Rouse, E.J., and Kuiken, T.A. (September, January 30). The effect of perturbation onset timing and length on tripping recovery strategies. Proceedings of the 2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Boston, MA, USA.","DOI":"10.1109\/IEMBS.2011.6091930"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1016\/j.gaitpost.2019.10.025","article-title":"Chronic obstructive pulmonary disease patients increase medio-lateral stability and limit changes in antero-posterior stability to curb energy expenditure","volume":"75","author":"Fallahtafti","year":"2020","journal-title":"Gait Posture"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1186\/s13643-019-1063-z","article-title":"Effects of walking speed on gait biomechanics in healthy participants: A systematic review and meta-analysis","volume":"8","author":"Fukuchi","year":"2019","journal-title":"Syst. Rev."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"265","DOI":"10.1016\/S0001-6918(02)00037-9","article-title":"Interlimb coordination in prosthetic walking: Effects of asymmetry and walking velocity","volume":"110","author":"Donker","year":"2002","journal-title":"Acta Psychol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1016\/j.jelekin.2011.12.007","article-title":"Symmetry and reproducibility of the components of dynamic stability in young adults at different walking velocities on the treadmill","volume":"22","author":"Suptitz","year":"2012","journal-title":"J. Electromyogr. Kinesiol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"444","DOI":"10.1016\/j.jbiomech.2004.12.014","article-title":"Kinematic variability and local dynamic stability of upper body motions when walking at different speeds","volume":"39","author":"Dingwell","year":"2006","journal-title":"J. Biomech."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"633","DOI":"10.1016\/0021-9290(93)90027-C","article-title":"Control of whole body balance in the frontal plane during human walking","volume":"26","author":"MacKinnon","year":"1993","journal-title":"J. Biomech."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1016\/j.jbiomech.2011.09.022","article-title":"The discriminant capabilities of stability measures, trunk kinematics, and step kinematics in classifying successful and failed compensatory stepping responses by young adults","volume":"45","author":"Crenshaw","year":"2012","journal-title":"J. Biomech."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.humov.2007.08.003","article-title":"The \u2018extrapolated center of mass\u2019 concept suggests a simple control of balance in walking","volume":"27","author":"Hof","year":"2008","journal-title":"Hum. Mov. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jbiomech.2004.03.025","article-title":"The condition for dynamic stability","volume":"38","author":"Hof","year":"2005","journal-title":"J. Biomech."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1069","DOI":"10.1007\/s11517-013-1076-z","article-title":"A real-time system for biomechanical analysis of human movement and muscle function","volume":"51","author":"Geijtenbeek","year":"2013","journal-title":"Med. Biol. Eng. Comput."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"443","DOI":"10.1007\/s004220000177","article-title":"Relative phase dynamics in perturbed interlimb coordination: Stability and stochasticity","volume":"83","author":"Post","year":"2000","journal-title":"Biol. Cybern."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2325","DOI":"10.1007\/s11517-018-1855-7","article-title":"Gait stability in response to platform, belt, and sensory perturbations in young and older adults","volume":"56","author":"Roeles","year":"2018","journal-title":"Med. Biol. Eng. Comput."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"48","DOI":"10.3389\/fbioe.2018.00048","article-title":"Foot placement modulation diminishes for perturbations near foot contact","volume":"6","author":"Vlutters","year":"2018","journal-title":"Front. Bioeng. Biotechnol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"M126","DOI":"10.1093\/gerona\/53A.2.M126","article-title":"Dynamic stability in elders: Momentum control in locomotor ADL","volume":"53","author":"Kaya","year":"1998","journal-title":"J. Gerontol. Ser. A"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"2655","DOI":"10.1242\/jeb.042572","article-title":"Balance responses to lateral perturbations in human treadmill walking","volume":"213","author":"Hof","year":"2010","journal-title":"J. Exp. Biol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1007\/s00221-013-3655-5","article-title":"Responses of human hip abductor muscles to lateral balance perturbations during walking","volume":"230","author":"Hof","year":"2013","journal-title":"Exp. Brain Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1111\/j.1748-1716.1985.tb07612.x","article-title":"Changes in leg movements and muscle activity with speed of locomotion and mode of progression in humans","volume":"123","author":"Nilsson","year":"1985","journal-title":"Acta Physiol. Scand."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1186\/1743-0003-6-9","article-title":"Lower trunk motion and speed-dependence during walking","volume":"6","author":"Kavanagh","year":"2009","journal-title":"J. Neuroeng. Rehabil."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"14621","DOI":"10.1038\/s41598-018-32839-8","article-title":"Lower extremity joint-level responses to pelvis perturbation during human walking","volume":"8","author":"Vlutters","year":"2018","journal-title":"Sci. Rep."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.jbiomech.2017.12.021","article-title":"Reduced center of pressure modulation elicits foot placement adjustments, but no additional trunk motion during anteroposterior-perturbed walking","volume":"68","author":"Vlutters","year":"2018","journal-title":"J. Biomech."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/5\/2833\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:48:20Z","timestamp":1760122100000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/5\/2833"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,3,5]]},"references-count":31,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2023,3]]}},"alternative-id":["s23052833"],"URL":"https:\/\/doi.org\/10.3390\/s23052833","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2023,3,5]]}}}