A PILOT STUDY TO EVALUATE SAGITTAL KINEMATIC VARIABLES IN ACCELERATED RUN USING OPENPOSE MARKERLESS MOTION CAPTURE SYSTEM

Authors

Mizuki Kitamura, Nippon Sport Science UniversityFollow
Mitsuo Otsuka, Nippon Sport Science UniversityFollow

Category

Athletics

Document Type

Paper

Abstract

This study evaluated the agreement between OpenPose markerless and marker-based methods in analyzing sprint start performance. Four male students performed ten sprint starts. The Bland-Altman test for average center of mass (COM) horizontal velocity from the beginning motion to 1-m position of the OpenPose markerless method showed a fixed bias of -0.02 m/s, 95% limits of agreement (LoA) from −0.10 to 0.06 m/s, and a proportional bias of r = −0.47. For the 1-m running time, fixed bias was −0.00 s, 95% LoA ranged from −0.09 to 0.09 s, and proportional bias was r = 0.39. In the calculation of forward tilt angle of trunk, fixed bias was −10°, 95% LoA ranged from −18 to −2°, and proportional bias was r = −0.18. Regarding the first step length, fixed bias was −0.00 m, with the 95% LoA ranging from −0.05 to 0.05 m and a proportional bias was r = 0.01. Therefore, data obtained through the current OpenPose markerless method should be interpreted carefully.

Recommended Citation

Kitamura, Mizuki and Otsuka, Mitsuo (2025) "A PILOT STUDY TO EVALUATE SAGITTAL KINEMATIC VARIABLES IN ACCELERATED RUN USING OPENPOSE MARKERLESS MOTION CAPTURE SYSTEM," ISBS Proceedings Archive: Vol. 43: Iss. 1, Article 49.
Available at: https://commons.nmu.edu/isbs/vol43/iss1/49