Bioelectrical activity of leg muscles while balancing on slippery surface in academic winter football

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Postgraduate Y.A. Gaevaya2
Postgraduate student Jiao Lu1
PhD student Xiao Feiyan1
Associate Professor A.A. Ilyin3
1National Research Tomsk State University, Tomsk
2National Research Tomsk Polytechnic University, Tomsk
3Tomsk University of Control Systems and Radioelectronics, Tomsk

Objective of the study was to study the bioelectrical activity of the leg muscles of academic winter footballers while balancing on a slippery surface.
Methods and structure of the study. Sampled for the study were the 21-25 year-old (3rd-4th years of study) male students specializing in winter football (n=20). All subjects were asked to perform two attempts per exercise: "half-squat jump" with landing on the unstable platform Reebok Core Board RSP-21160. During the second attempt, the slide board GYMSTICK Power Slider 61131-PRO was attached to the 17 cm high platform. The slide board was 4.5 cm high. During the first attempt, the unstable platform was raised to a height of 21.5 cm.
Results and conclusions. The findings helped determine the main regularities in the lower limb muscle work organization of winter footballers while balancing on an unstable slippery surface. All totaled, the results obtained suggest that it is the rectus muscles of the thighs and calf muscles that are actively involved in the maintenance of equilibrium when jumping on a slippery surface, but the nature of their work changes significantly - the activity of the motor units is desynchronized, while the number of motor units involved grows. In contrast, the activity of the long adductor muscle of the thigh in these conditions is decreased. According to the findings complex coordination skills when playing on a slippery surface are associated with the development of specific movement patterns. 

Keywords: students, winter football, electromyography, muscles, movement coordination, body balancing skills.

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