Article
The key factors of the competitive performance of cross-country skiers are a high level of mastering the technique of movements and the corresponding special preparedness, the manifestation of which (quick switching from performing some motor actions to performing others, differentiation of biomechanical parameters, rhythmic structure of movements, optimal muscle activity) is determined by the reciprocal coordination.
The research purpose is to test a method for assessing and monitoring the technical fitness of cross-country skiers according to biomechanical indicators that characterize reciprocal coordination of movements during load testing in conditions of the ski-roller treadmill.
Methods and organization of the research. A highly qualified athlete (master of sports of international class), a member of the national team of the Republic of Belarus in cross-country skiing, took part in the pilot testing. The athlete was offered load testing on the ski-roller treadmill (stage duration – 240 s, rest duration between stages – 40 s, testing is performed until complete fatigue). During the test, using portable strain gauges, the forces applied to the ski poles and roller skis were recorded. At the same time, muscle bioelectrical activity and kinematic indices of the spatial movement of the athlete were recorded wirelessly.
Research results and their discussion. According to the results of testing, the degrees of asymmetry of movements were established in terms of power and time parameters. According to the indicators of bioelectrical activity of muscles and kinematic indicators of the athlete's spatial movement, objective causal relationships of the motor organization of ski movements from the point of view of reciprocal coordination were established.
Conclusion. The control of the technical preparedness of skiers by the metrics of the reciprocal coordination of movements, allows to determine deficiencies in the motor organization of ski movements, as evidenced by the results of the study.
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