Abstract des Autors

Several studies have investigated the kinetics and kinematics of snatch technique. There are also various articles and opinions in coaching journals and scientific journals on the technical aspects of the snatch and related lifts. The bar path suggested as "correct" in many coaching articles published in the U.S. is similar to that seen in European, Asian, and Canadian lifters in some regions of the bar trajectory, while being quite different in other regions. The literature suggests several ideas about horizontal displacement (position of the catch relative to the starting position of the bar) during the lift. Some coaches and sport scientists suggest that no horizontal displacement is best. Others say a backward displacement is preferred. Almost all the research and coaching articles indicate that large horizontal displacements are no good. However, most of the non-U.S. lifts discussed in the literature well as lifts in European competitions have a rather large backward displacement of the bar (approx. 10 to 20 cm) relative to the starting position. It follows that this large reaward movement of the bar would require a backward movement of the body (and feet) in order to keep the base of support under the bar, a movement most U.S. coaches would consider undesirable. Regardless of coaching philosophy, the confounding issue in all of the kinematic investigations from competitions is that it appears no single variable can reliably predict success during the lift. It seems logical that the more horizontal the bar's movement, the greater the energy expenditure and strength required to stabilize the bar in the catch position. However, it appears that large horizontal movements, either forward or backward, do not by themselves determine the outcome of an attempt in the snatch. Bar tracings showing widely varying bar paths have been recorded for both successful and unsuccessful lifts. Comparing bar height attained during the lifts is not practical without an indepth anthropometric analysis of each lifter. Bar velocities and drop velocities (lifter moving under the bar) also show great inter- and intralifter variation. Many factors can influence the outcome of a snatch attempt. Therefore, whatever determines success is likely to be multifactorial in nature. Verf.-Referat