MARKERLESS VIDEO-BASED ESTIMATION OF 3D APPROACH VELOCITY IN THE JAVELIN THROW

Authors

Miika Köykkä, Finnish Institute of High Performance Sport KIHU, Jyväskylä, Finland; Neuromuscular Research Centre, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, FinlandFollow
Krista Vohlakari, Neuromuscular Research Centre, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, FinlandFollow
Tero Joutsen, Finnish Institute of High Performance Sport KIHU, Jyväskylä, FinlandFollow
Tomi Vänttinen, Finnish Institute of High Performance Sport KIHU, Jyväskylä, FinlandFollow
Petteri Piironen, Finnish Athletics Federation, Helsinki, Finland; Kuortane Olympic Training Center, Kuortane, Finland
Timo Rantalainen, Neuromuscular Research Centre, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, FinlandFollow
Neil Cronin, Neuromuscular Research Centre, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland; School of Sport and Exercise, University of Gloucestershire, UKFollow

Category

Athletics

Document Type

Paper

Abstract

The purpose of this study was to explore the usefulness of a markerless open-source human pose estimation algorithm, for estimating centre of mass (CoM) velocity in the javelin throw at three discrete time instances: the last right leg touchdown (RLTD), brace leg touchdown (BLTD) and release. Forty throws from four right-handed javelin throwers were simultaneously captured with two high-speed video cameras and a 16-camera marker-based Vicon motion capture system. For horizontal resultant velocity (Vel_hor), the method demonstrated excellent validity at RLTD, whereas at BLTD and release errors were notable. Based on these findings, CoM Vel_hor can be estimated using the proposed method with promising accuracy at RLTD. At BLTD and release, using a CoM segment model with arms in more optimized measurement conditions might further improve the accuracy.

Recommended Citation

Köykkä, Miika; Vohlakari, Krista; Joutsen, Tero; Vänttinen, Tomi; Piironen, Petteri; Rantalainen, Timo; and Cronin, Neil (2022) "MARKERLESS VIDEO-BASED ESTIMATION OF 3D APPROACH VELOCITY IN THE JAVELIN THROW," ISBS Proceedings Archive: Vol. 40: Iss. 1, Article 85.
Available at: https://commons.nmu.edu/isbs/vol40/iss1/85