As a markerless motion capture system(MLS),the Microsoft Kinect sensor may be a low-cost and portable option for measuring shoulder joint angles.However,the system's concurrent validity to capture shoulder functio...As a markerless motion capture system(MLS),the Microsoft Kinect sensor may be a low-cost and portable option for measuring shoulder joint angles.However,the system's concurrent validity to capture shoulder functional movement is unclear.The purpose of this study was to investigate the concurrent validity of MLS for capturing shoulder kinematics during functional movement by comparing the MLS measures to those of the marker-based motion capture system(MBS).Twenty-five healthy participants were included in this study.Using the Microsoft Kinect sensor as the MLS and Vicon as the MBS,six shoulder functional movements were measured in all three anatomical planes concurrently.The six movements included flexion to max,maximum extension,abduction to 90°,internal rotation at 90°abduction,external rotation at 0°abduction,and maximum horizontal adduction.The shoulder joint kinematics was measured with both systems.The MLS showed a good to excellent correlation(r>0.75)with MBS for abduction to 90°,maximum external rotation at 0°abduction and maximum internal rotation at 90°abduction.The results for maximum extension(r=0.727)and maximum horizontal adduction(r=0.619)showed a moderate to good correlation.For maximum flexion,a poor correlation was observed(r=0.479).The validity of the MLS to measure shoulder kinematics would be acceptable.The system demonstrates potential as a measurement tool of joint motions for a function assessment and rehabilitation purpose.展开更多
Squats,ascending and descending stairs,and lunges are three functional movements popularly used in clinical rehabilitation.This study aimed to analyze the validity of the Kinect v2 for assessing the kinematics of thre...Squats,ascending and descending stairs,and lunges are three functional movements popularly used in clinical rehabilitation.This study aimed to analyze the validity of the Kinect v2 for assessing the kinematics of three functional knee movements.An intelligent program was developed for real-time kinematic evaluation of the knee joint using the Kinect v2 system.Based on image recognition technology,images from the Kinect v2 depth camera were used to develop a kinematic evaluation program for knee joint movements.The kinematics of 30 healthy volunteers during stair ascent and descent,squatting,and lunging movements were collected synchronously with both VICON and Kinect systems.The peak knee angles in the sagittal and coronal planes were extracted and analyzed.A paired samples t-test and the relative coefficient within the groups were used for statistical analysis of the validity of the Kinect compared to the VICON.There was no significant difference(p>0.05)in bilateral knee flexion angle when lunging.No significant difference(p>0.05)was found in left knee flexion during squatting exercises.Although the Kinect generally underestimated knee flexion and valgus,it displayed excellent consistency and good to excellent agreement with the VICON motion analysis system.The results demonstrated that the Kinect based measurement tool for analyzing knee kinematics has the potential to be an effective clinical training device for maintaining knee alignment during exercise.展开更多
基金The present study was funded by the National Key Research&Development Program of China(2021YFE0204500)Shanghai Disabled Persons’Federation(K2018031)the Shanghai Traditional Chinese Medicine Inheritance and Technological Innovation Project(ZYKC2019032).
文摘As a markerless motion capture system(MLS),the Microsoft Kinect sensor may be a low-cost and portable option for measuring shoulder joint angles.However,the system's concurrent validity to capture shoulder functional movement is unclear.The purpose of this study was to investigate the concurrent validity of MLS for capturing shoulder kinematics during functional movement by comparing the MLS measures to those of the marker-based motion capture system(MBS).Twenty-five healthy participants were included in this study.Using the Microsoft Kinect sensor as the MLS and Vicon as the MBS,six shoulder functional movements were measured in all three anatomical planes concurrently.The six movements included flexion to max,maximum extension,abduction to 90°,internal rotation at 90°abduction,external rotation at 0°abduction,and maximum horizontal adduction.The shoulder joint kinematics was measured with both systems.The MLS showed a good to excellent correlation(r>0.75)with MBS for abduction to 90°,maximum external rotation at 0°abduction and maximum internal rotation at 90°abduction.The results for maximum extension(r=0.727)and maximum horizontal adduction(r=0.619)showed a moderate to good correlation.For maximum flexion,a poor correlation was observed(r=0.479).The validity of the MLS to measure shoulder kinematics would be acceptable.The system demonstrates potential as a measurement tool of joint motions for a function assessment and rehabilitation purpose.
基金The present study was funded by grant from Shanghai Disabled Persons’Federation(K2018027).
文摘Squats,ascending and descending stairs,and lunges are three functional movements popularly used in clinical rehabilitation.This study aimed to analyze the validity of the Kinect v2 for assessing the kinematics of three functional knee movements.An intelligent program was developed for real-time kinematic evaluation of the knee joint using the Kinect v2 system.Based on image recognition technology,images from the Kinect v2 depth camera were used to develop a kinematic evaluation program for knee joint movements.The kinematics of 30 healthy volunteers during stair ascent and descent,squatting,and lunging movements were collected synchronously with both VICON and Kinect systems.The peak knee angles in the sagittal and coronal planes were extracted and analyzed.A paired samples t-test and the relative coefficient within the groups were used for statistical analysis of the validity of the Kinect compared to the VICON.There was no significant difference(p>0.05)in bilateral knee flexion angle when lunging.No significant difference(p>0.05)was found in left knee flexion during squatting exercises.Although the Kinect generally underestimated knee flexion and valgus,it displayed excellent consistency and good to excellent agreement with the VICON motion analysis system.The results demonstrated that the Kinect based measurement tool for analyzing knee kinematics has the potential to be an effective clinical training device for maintaining knee alignment during exercise.
