Hwang, Soree Kim, Jongman Yang, Sumin Moon, Hyuk-June Cho, Kyung-Hee Youn, Inchan Sung, Joon-Kyung Han, Sungmin 2024-10-04T02:30:20Z 2024-10-04T02:30:20Z 2024-10-02 2024-09 https://pubs.kist.re.kr/handle/201004/150722 Gait analysis systems are critical for assessing motor function in rehabilitation and elderly care. This study aimed to develop and optimize an abnormal gait classification algorithm considering joint impairments using inertial measurement units (IMUs) and walkway systems. Ten healthy male participants simulated normal walking, walking with knee impairment, and walking with ankle impairment under three conditions: without joint braces, with a knee brace, and with an ankle brace. Based on these simulated gaits, we developed classification models: distinguishing abnormal gait due to joint impairments, identifying specific joint disorders, and a combined model for both tasks. Recursive Feature Elimination with Cross-Validation (RFECV) was used for feature extraction, and models were fine-tuned using support vector machine (SVM), random forest (RF), and extreme gradient boosting (XGB). The IMU-based system achieved over 91% accuracy in classifying the three types of gait. In contrast, the walkway system achieved less than 77% accuracy in classifying the three types of gait, primarily due to high misclassification rates between knee and ankle joint impairments. The IMU-based system shows promise for accurate gait assessment in patients with joint impairments, suggesting future research for clinical application improvements in rehabilitation and patient management. English Multidisciplinary Digital Publishing Institute (MDPI) Machine Learning Based Abnormal Gait Classification with IMU Considering Joint Impairment Article 10.3390/s24175571 1 Sensors, v.24, no.17 Sensors 24 17 Y scie scopus 001311378500001 2-s2.0-85203874666 Chemistry, Analytical Engineering, Electrical & Electronic Instruments & Instrumentation Chemistry Engineering Instruments & Instrumentation Article PARAMETERS DISTURBANCES RELIABILITY WALKWAY SYSTEM abnormal gait joint impairment IMU-based system walkway system RFECV machine learning classification