Table 1.

Electronic databases retrieve strategy.

Search items	Limit conditions
PubMed, Web of Science, SPORTDiscus, Scopus
(“wearable sensor” OR “inertial sensor” OR “accelerometer” OR “gyroscope” OR “IMU”) AND (“machine learning” OR “classification” OR “regression” OR “clustering” OR “PCA” OR “SVM” OR “KNN” OR “decision tree” OR “boosting” OR “random forest” OR “deep learning” OR “neural network*” OR “CNN” OR “RNN” OR “LSTM” OR “ConvLSTM” OR “DeepConvLSTM”) AND (“running” OR “jogging”) AND (“gait” OR “lower limb” OR “lower extremity” OR “plantar pressure” OR “foot” OR “ankle” OR “shank” OR “knee” OR “thigh”)	Keywords in all field of the article; Advanced search; Article type: Journal; Language: English; Publish time: From 2000 to May 2021
IEEE Xplore
(“wearable sensor” OR “inertial sensor” OR “IMU”) AND (“machine learning” OR “classification” OR “regression” OR “clustering” OR “deep learning” OR “neural network*”) AND (“running” OR “jogging”) AND (“gait” OR “lower limb” OR “lower extremity”)	Keywords in all field of the article; Advanced search; Article type: Journal; Language: English; Publish time: From 2000 to May 2021
ScienceDirect
(“wearable sensor” OR “inertial sensor” OR “IMU”) AND (“machine learning” OR “deep learning”) AND (“running”) AND (“gait” OR “lower limb”)	Keywords in full text and metadata; Advanced search; Article type: Journal; Language: English; Publish time: From 2000 to May 2021