Divergence of the force field in the process of movement by the «shuttle» method

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Levitskiy A.G.
Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg

Matveev D.A.
Saint Petersburg State University, St. Petersburg

Potsipun A.A.
Saint Petersburg State University, St. Petersburg

Oshina O.V.
Saint Petersburg State University, St. Petersburg

Objective of the study: To estimate the density of the force field in which the athlete's center of gravity moves during the shuttle movement.

Methods and structure of the study: The authors made video recordings of a demonstration of shuttle movement by two athletes: a master of sports in jiu-jitsu (weight 52 kg, height 1,6 meters) and an athlete at the initial stage of training (weight 30 kg, height 1,2 meters). For each athlete, a trajectory of the center of gravity was constructed for one oscillation of the center of gravity (for one forward and backward movement), the values of the projections of the velocities and accelerations of the centers of gravity on the coordinate axes were calculated.

Results and conclusions: A comparison of the divergences of the force fields of a highly skilled athlete and an athlete at the initial stage of training was conducted. As a result of the experiment, it was found that the intervals in which the intervals of the divergence values of the force field of a highly skilled athlete change are significantly larger than those of a beginner athlete. In addition, it can be concluded that a highly skilled athlete uses external conditions (gravitational force) to a greater extent compared to a less experienced athlete.

Keywords: Biomechanics of motor activity, jiu-jitsu, divergence.

References:

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