Author(s): CHEN, J.S., BAN, Y., HSU, C., HO, W., Institution: UNIVERSITY OF TAIPEI, Country: TAIWAN, Abstract-ID: 1932

INTRODUCTION:
In this paper, we create a novel snatch technical index considering the relation between the lifters body and barbell trajectory from a competition video. Snatch processes lifters coordination skills in continuous movement, hence we observe the relation between body information and barbell kinematic parameters. We utilize our novel technical index to indicate the lifters performance of elite and ordinary athletes, respectively and further verify the precision of our snatch technical index by independent sample t-test.
METHODS:
The novel snatch technical index is established with the body information and barbell trajectory from the video, which reflects the real situations in the snatch movement. We capture these competition videos from the 2019 and 2020 National Intercollegiate Athletic Games (Taiwan) womens weightlifting lightweight categories (45-59kg). The lifters body information is obtained by Intel OpenVINO with the Microsoft COCO model. Barbell trajectory is gathered by our previous barbell tracking algorithm (Hsu, C. T., Ho, W. H., & Chen, J. S., 2018). Then we calculate the area between the lifters upper extremity and the barbell from each frame and further gather the mean of these areas of the snatch movement. Finally, an independent sample t-test verifies the lifters performance of two groups (elite and ordinary).
RESULTS:
We gather the snatch technical index of elite and ordinary lifters, respectively. The elites mean area is less than the ordinary (912.945 cm2 < 1176.164 cm2) and there are significant differences from the independent sample t-test (p=0.003*).
CONCLUSION:
The proposed female snatch technical index indicates the weighting lifters sports performance both considering the mean area of the lifters body and barbell trajectory. According to the results, the mean area of the elite group is significantly less than the ordinary group. This observation shows that our snatch technical index can efficiently estimate the lifters sports performance.