The purpose of this study was to describe the kinematic characteristics of the snatch technique from the viewpoint of barbell trajectory. Subjects included 6 elite male Asian weight lifters who participated in the first Japan International Friendship Tournament in 1993. Trajectories of the barbell during snatch lifts in the competition were video-taped. Three vertical acceleration peaks of the barbell during the pull movement were observed and corresponded to the first pull transition, and second pull phases. The angle of the resultant acceleration (ARA) of the barbell averaged 85° in the first pull and transition pull phases. In the second pull phase, the ARA was almost 140°, indicating that the barbell was accelerated anteriorly, away from the lifter. The results of this study suggest that during the first pull and transition pull phases, elite lifters pulled the barbell toward themselves to produce the needed vertical acceleration and that the resulting posterior movement of the barbell was controlled by the forward acceleration produced in the second pull phase.
Tadao Isaka is with the Department of Mechanical Engineering, Ritsumeikan University, Kusatsu, Shiga 525-77, Japan. Junichi Okada is with the Department of Sports Sciences, Waseda University, Tokorozawa, Saitama 359, Japan. Kazuo Funato is with the Department of Life Sciences (Sports Sciences), University of Tokyo, Meguro, Tokyo 153, Japan.