Study of static balance of young skiers-jumpers and nordic combined athletes by means of stabilometry

Relevance. The balance function is purposefully developed in athletes engaged in ski jumping and cross-country skiing from an early age, however, a comparison of specific indicators of the static balance of representatives of the two sports has not been carried out so far.
The aim is a comparative analysis of the static balance of ski jumpers and biathlon skiers aged 12-14 who are engaged in the training stage of training.
Methods and organization of research. To assess the static balance in the laboratory, a sample in the acceleration rack was used. The athletes had to keep the balance for 30 seconds, with a tolerance control of 9 seconds. Descriptive statistics of all variables (M and SD) and statistical analysis were carried out in StatPlus 7 software. Visualization of indicators was performed in Rstudio. The calculations of the effect size were determined by the G-Hedges index, adjusted for samples of different sizes. The correlations were evaluated by the Pearson linear correlation test.
Conclusions. Pronounced and moderate disturbances of the equilibrium function were revealed. Biathlon skiers with a large effect size (g=2.6; g=3.8) have a lower LFS coefficient and a CD movement speed, which reflects better stability. Jumpers with an average effect size greater than double-wrestlers shift the CD to the right (g=0.5) and to the left (g=0.6). In both groups, an excessive forward displacement of the CD (Y, mm) was found (LD-131.98±25.77 mm; PLT-135.40±28.59 mm). Significantly significant correlations in the group of young ski jumpers were established between the length of the jump (R=0.6), points for jumping technique (R=0.5) and the "equilibrium function".

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