{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T04:29:59Z","timestamp":1772252999499,"version":"3.50.1"},"reference-count":32,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2021,6,21]],"date-time":"2021-06-21T00:00:00Z","timestamp":1624233600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Gait analysis has historically been implemented in laboratory settings only with expensive instruments; yet, recently, efforts to develop and integrate wearable sensors into clinical applications have been made. A limited number of previous studies have been conducted to validate inertial measurement units (IMUs) for measuring ankle joint kinematics, especially with small movement ranges. Therefore, the purpose of this study was to validate the ability of available IMUs to accurately measure the ankle joint angles by comparing the ankle joint angles measured using a wearable device with those obtained using a motion capture system during running. Ten healthy subjects participated in the study. The intraclass correlation coefficient (ICC) and standard error of measurement were calculated for reliability, whereas the Pearson coefficient correlation was performed for validity. The results showed that the day-to-day reliability was excellent (0.974 and 0.900 for sagittal and frontal plane, respectively), and the validity was good in both sagittal (r = 0.821, p &lt; 0.001) and frontal (r = 0.835, p &lt; 0.001) planes for ankle joints. In conclusion, we suggest that the developed device could be used as an alternative tool for the 3D motion capture system for assessing ankle joint kinematics.<\/jats:p>","DOI":"10.3390\/s21124240","type":"journal-article","created":{"date-parts":[[2021,6,21]],"date-time":"2021-06-21T13:29:58Z","timestamp":1624282198000},"page":"4240","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Measurement of Ankle Joint Movements Using IMUs during Running"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6220-6774","authenticated-orcid":false,"given":"Byong Hun","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Physical Education, Yonsei University, Seoul 03722, Korea"},{"name":"International Olympic Committee Research Centre Korea, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sung Hyun","family":"Hong","sequence":"additional","affiliation":[{"name":"Department of Sports Industry Studies, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1040-3204","authenticated-orcid":false,"given":"In Wook","family":"Oh","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yang Woo","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8385-8656","authenticated-orcid":false,"given":"In Ho","family":"Kee","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sae Yong","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Physical Education, Yonsei University, Seoul 03722, Korea"},{"name":"International Olympic Committee Research Centre Korea, Yonsei University, Seoul 03722, Korea"},{"name":"Institute of Convergence Science, Yonsei University, Seoul 03722, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"190","DOI":"10.1097\/JSM.0b013e31827d21fe","article-title":"Epidemiology of US high school sports-related ligamentous ankle injuries, 2005\/06\u20132010\/11","volume":"23","author":"Swenson","year":"2013","journal-title":"Clin. J. Sport Med. Off. J. Can. Acad. Sport Med."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1177\/0363546516660980","article-title":"The epidemiology of lateral ligament complex ankle sprains in National Collegiate Athletic Association sports","volume":"45","author":"Roos","year":"2017","journal-title":"Am. J. Sports Med."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2279","DOI":"10.2106\/JBJS.I.01537","article-title":"The epidemiology of ankle sprains in the United States","volume":"92","author":"Waterman","year":"2010","journal-title":"JBJS"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1016\/j.csm.2008.03.006","article-title":"Sensorimotor deficits with ankle sprains and chronic ankle instability","volume":"27","author":"Hertel","year":"2008","journal-title":"Clin. Sports Med."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1080\/03093640600983949","article-title":"Clinical applications of sensors for human posture and movement analysis: A review","volume":"31","author":"Wong","year":"2007","journal-title":"Prosthet. Orthot. Int."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Merriaux, P., Dupuis, Y., Boutteau, R., Vasseur, P., and Savatier, X. (2017). A study of vicon system positioning performance. Sensors, 17.","DOI":"10.3390\/s17071591"},{"key":"ref_7","unstructured":"Smith, A.C. (2013). Coach informed biomechanical analysis of the golf swing. [Ph.D. Thesis, Loughborough University]."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2085","DOI":"10.1016\/j.jbiomech.2016.05.007","article-title":"Analysis of accuracy in optical motion capture\u2013A protocol for laboratory setup evaluation","volume":"49","author":"Eichelberger","year":"2016","journal-title":"J. Biomech."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1007\/s10846-012-9772-8","article-title":"A methodology for the performance evaluation of inertial measurement units","volume":"71","author":"Sessa","year":"2012","journal-title":"J. Intell. Robot. Syst."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Filippeschi, A., Schmitz, N., Miezal, M., Bleser, G., Ruffaldi, E., and Stricker, D. (2017). Survey of motion tracking methods based on inertial sensors: A focus on upper limb human motion. Sensors, 17.","DOI":"10.3390\/s17061257"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1016\/j.medengphy.2015.11.009","article-title":"Validity of an inertial measurement unit to assess pelvic orientation angles during gait, sit\u2013stand transfers and step-up transfers: Comparison with an optoelectronic motion capture system","volume":"38","author":"Bolink","year":"2016","journal-title":"Med. Eng. Phys."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"N63","DOI":"10.1088\/0967-3334\/34\/8\/N63","article-title":"Concurrent validation of Xsens MVN measurement of lower limb joint angular kinematics","volume":"34","author":"Zhang","year":"2013","journal-title":"Physiol. Meas."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2678","DOI":"10.1016\/j.jbiomech.2009.08.004","article-title":"Inertial sensor-based knee flexion\/extension angle estimation","volume":"42","author":"Cooper","year":"2009","journal-title":"J. Biomech."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"240","DOI":"10.1016\/j.measurement.2016.01.007","article-title":"Concurrent validation of magnetic and inertial measurement units in estimating upper body posture during gait","volume":"82","author":"Kang","year":"2016","journal-title":"Measurement"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Al-Amri, M., Nicholas, K., Button, K., Sparkes, V., Sheeran, L., and Davies, J.L. (2018). Inertial measurement units for clinical movement analysis: Reliability and concurrent validity. Sensors, 18.","DOI":"10.3390\/s18030719"},{"key":"ref_16","first-page":"6","article-title":"A tutorial on se (3) transformation parameterizations and on-manifold optimization","volume":"3","author":"Blanco","year":"2010","journal-title":"Tech. Rep."},{"key":"ref_17","first-page":"354","article-title":"Estimation of Center of Mass Trajectory using Wearable Sensors during Golf Swing","volume":"14","author":"Najafi","year":"2015","journal-title":"J. Sports Sci. Med."},{"key":"ref_18","first-page":"1","article-title":"Kinematic analysis of a six-degrees-of-freedom model based on ISB recommendation: A repeatability analysis and comparison with conventional gait model","volume":"2015","author":"Pezowicz","year":"2015","journal-title":"Appl. Bionics Biomech."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"390","DOI":"10.1037\/1082-989X.1.4.390","article-title":"\u201cForming inferences about some intraclass correlations coefficients\u201d: Correction","volume":"1","author":"McGraw","year":"1996","journal-title":"Psychol. Methods"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1049\/htl.2014.0100","article-title":"Wireless wearable range-of-motion sensor system for upper and lower extremity joints: A validation study","volume":"2","author":"Kumar","year":"2015","journal-title":"Healthc. Technol. Lett."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1186\/1476-5918-8-3","article-title":"A portable system for collecting anatomical joint angles during stair ascent: A comparison with an optical tracking device","volume":"8","author":"Bergmann","year":"2009","journal-title":"Dyn. Med."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1123\/jab.2014-0191","article-title":"Reliability and validity of instrumented soccer equipment","volume":"31","author":"Akins","year":"2015","journal-title":"J. Appl. Biomech."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"872","DOI":"10.5535\/arm.2018.42.6.872","article-title":"Evaluation of Validity and Reliability of Inertial Measurement Unit-Based Gait Analysis Systems","volume":"42","author":"Cho","year":"2018","journal-title":"Ann. Rehabil. Med."},{"key":"ref_24","first-page":"3","article-title":"Comparative analysis of different wireless technologies","volume":"1","author":"Chhabra","year":"2013","journal-title":"Int. J. Sci. Res. Netw. Secur. Commun."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"19709","DOI":"10.3390\/s150819709","article-title":"High frequency sampling of TTL pulses on a Raspberry Pi for diffuse correlation spectroscopy applications","volume":"15","author":"Tivnan","year":"2015","journal-title":"Sensors"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1016\/j.measurement.2016.12.037","article-title":"Raspberry Pi as a low-cost data acquisition system for human powered vehicles","volume":"100","year":"2017","journal-title":"Measurement"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1016\/j.gaitpost.2007.11.009","article-title":"Quantitative comparison of five current protocols in gait analysis","volume":"28","author":"Ferrari","year":"2008","journal-title":"Gait Posture"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"208","DOI":"10.1016\/j.proeng.2014.06.035","article-title":"Portable inertial motion unit for continuous assessment of in-shoe foot movement","volume":"72","author":"Mifsud","year":"2014","journal-title":"Procedia Eng."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"061006","DOI":"10.1115\/1.4006674","article-title":"Measurement of multi-segment foot joint angles during gait using a wearable system","volume":"134","author":"Rouhani","year":"2012","journal-title":"J. Biomech. Eng."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"18813","DOI":"10.3390\/s150818813","article-title":"Upper limb kinematics using inertial and magnetic sensors: Comparison of sensor-to-segment calibrations","volume":"15","author":"Bouvier","year":"2015","journal-title":"Sensors"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"S220","DOI":"10.1016\/j.pmrj.2018.06.013","article-title":"Wearable movement sensors for rehabilitation: A focused review of technological and clinical advances","volume":"10","author":"Porciuncula","year":"2018","journal-title":"PM&R"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"5679","DOI":"10.1109\/JSEN.2016.2569160","article-title":"Magnetometer calibration using inertial sensors","volume":"16","author":"Kok","year":"2016","journal-title":"IEEE Sens. J."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/12\/4240\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:20:18Z","timestamp":1760163618000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/12\/4240"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6,21]]},"references-count":32,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2021,6]]}},"alternative-id":["s21124240"],"URL":"https:\/\/doi.org\/10.3390\/s21124240","relation":{"has-preprint":[{"id-type":"doi","id":"10.20944\/preprints202105.0771.v1","asserted-by":"object"}]},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,6,21]]}}}