Belarusian State University of Physical Culture

IntroductionDespite the extensive penetration of digital technologies into the field of sports, a comprehensive review of the knowledge structure and developmental trends in this domain remains lacking. This study aims to employ co-word analysis to systematically map, for the first time, the knowledge landscape of international digital sports research from 2005 to 2025, identifying its core themes and evolutionary trends.MethodsDrawing on a sample of 1,318 core English-language papers from the Web of Science database, this study utilized BICOMB 2.0, SPSS 26.0, and UCINET 6.0 to conduct high-frequency word analysis, social network analysis, and cluster analysis.ResultA total of 39 high-frequency keywords were extracted, and four main research clusters were identified: Digital Innovation Promoting the Development of Sports Media; Implementation of Digital Devices in Sports Training; Integration of Digital Technology in Physical Education; Impact of Digital Transformation on Sports Health. The study found that “exercise,” “gamification,” and “physical activity” were the most closely interconnected terms, while keywords such as “kinesiology” and “biomechanics” remained at the periphery of the research network.ConclusionThis study reveals, for the first time, the four major clusters within digital sports research and their underlying socio-technical logics—platformization, the datafication of the body, technological mediation, and the health paradox. It also highlights the disconnect between traditional sports science and digital research. This macro-level framework provides a foundation for subsequent theoretical integration and interdisciplinary dialogue.

Objective. To study state dynamics of the cardiovascular system of athletes in acyclic sports against the background of submaximal physical activity to identify individuals at high risk of cardiovascular complications, including sudden cardiac deathMaterials and methods. The survey was conducted among athletes of acyclic sports. Number of people examined: 50, average age 20.0±3.5 years old. Of these, 30 (60%) were men, average age 19.9±3.4 years old; women – 20 (40%), average age 21.0±3.8 years old. Qualification of athletes: CMS, MS, MSIC.Results. At rest, instability of the depolarization phase is indicated by two ECG markers: a fragmented frQRS complex and a spatial QRS-T angle of more than 105º. Fragmented frQRS was detected in 73% of young males and 33% of young females. The average values of the QRS-T angle were within the physiological norm: 63±23º in young males and 40±14º in young females. Electrical ventricular systole, expressed by the Q-T interval, was 373±26 ms in young males and 385±35 ms in young females. The average value of the second indicator of repolarization instability Q-T interval dispersion was 50.7±12.8 ms in young males and 39.3±14.6 ms in young females. The average TWA amplitude in young males was 21.0 (18; 24) μV, and 20.5 (14; 25) μV in young females. Analysis of ECG markers of dysfunction of autonomic nervous regulation showed that the slowdown in heart rate DC was 19.0 (14.8; 31.5) ms in young males, 19.5 (11.8; 21.5) ms in young females. The acceleration of heart rate AC in young males was 19.8 (13.8; 26.0) ms, and 19.5 (11.5; 21.5) ms in young females.After the load, no statistically significant changes in the frequency of detection of fragmented frQRS were observed in young males (p = 0.7472), while in young females a statistically significant increase in the frequency of detection of frQRS was detected (p = 0.0226). The average value of the QRS-T angle increased significantly – from 63±23ºto 85±25º in young males (p = 0.0117), while it did not change significantly in young females – from 40±24º to 55±26º (p = 0.2606). Q-T dispersion in afterload compared to rest increased from 50.7±12.8 ms and reached 72.8±25.0 ms (p = 0.000) in young males and from 39.3±14.6 ms to 68.2 ±10.7 ms in young females (p = 0.0029). Deceleration (DC) and acceleration (AC) of heart rate decreased significantly in young males. For young males – by 77.7 and 82.3%, respectively (p < 0.0001), and for young females – by 84.9 and 80.0%, respectively (p < 0.0001).Conclusion. At rest, we identified only 10 markers of electrical instability of the myocardium, and 38 markers after exercise, that is, almost 4 times more. This suggests that even in highly qualified athletes, load causes a trend towards electrical instability of the myocardium, mainly in the repolarization phase and in relation to autonomic nervous regulation.

The result of the research was the development of a mobile application called Sport Selection, which uses an algorithm to compare a child's anthropometric model with the model of elite athletes and provides the result in percentage correspondence.

The article discusses problems of sports selection of prospective children in track and field athletics. The article presents results of a longitudinal study of athletic sprinters in the age range of 12–14 years. The research goal is to provide a scientific basis for predicting motor abilities of sprint athletes at the stage of initial sports specialization. The object of research – educational and training process of short distance runners at the stage of initial sports specialization. The specific scientific methodology of this study is presented by research methods that provide reliable empirical material and its primary processing (analysis of scientific and methodological literature, questionnaires, anthropometric measurements, control and pedagogical tests, assessment of biological maturity, methods of psychophysiological testing, dermatoglyphic method, method of expert evaluation, methods of mathematical statistics). For the first time, a complex method of predicting the motor abilities of young runners at short distances was developed and tested. For the purpose of revealing the effectiveness of the developed method, a formative pedagogical experiment was carried out, in which 40 runners for short distances (boys) aged 12 years with normal rate of biological maturation took part. The study was conducted at the “Burevestnik-73” Children’s and Youth Education and Training Center (Vitebsk) and Children and Youth Sports School of Olympic Reserve № 2 of the Belarusian Physical Culture and Sports Society “Dynamo” (Minsk). According to the results of performances during the season 2018–2019 it was noted that the majority (72.56%) of winners and medalists of town, regional and national competitions are athletes from the experimental group with an assessment of the prospects of “above average”, “high”, while sprinters with an assessment of the prospects of “average”, “below average” and “low” in this number were not included. The results of the pedagogical experiment demonstrated the effectiveness of this method. It was noted that an objective assessment of the prospects of young athletes can be obtained only on the basis of comprehensive studies.

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АННОТАЦИЯ Статья посвящена

Цель: Регулярные занятия физическими упражнениями вызывают сердечную физиологическую гипертрофию. Цель данного исследования состояла в том, чтобы определить влияние аэробной непрерывной тренировки и периода отдыха на структуру левого желудочка и функции сердца у не спортсменов здоровых мужчин. Материал : Десять неподготовленные здоровых студентов мужского пола (в возрасте 18-22 лет) добровольно участвовали программе непрерывного бега трусцой (3 дня/неделю, на 70% от максимальной частоты сердечных сокращений в течение 45 мин, 8 недель) в сельской местности и четыре недели после период отдыха. Использовали: M-режим, 2-мерная, цвет и доплеровская трансторакальная эхокардиография в условиях покоя, а также до и после тренировки и после периода отдыха. Результаты : Использование t-теста позволило обнаружить существенную разницу в диаметре конечного систолического давления и толщины задней стенки, процентное укорочения и фракцию выброса после восемь недель тренировки. Не было обнаружено существенных различий в конечном диастолическом диаметре, толщине межжелудочковой перегородки, диаметре левого предсердия, диаметра аорты, частота сердечных сокращений, систолического и диастолического артериального давления. После четырех недель периода отдыха после тренировки по сравнению с 8 неделями занятий обнаружена значительная разница конечного диастолического диаметра, процента укорочения и фракции выброса. Не обнаружено существенной разницы в диаметре конечного систолического, толщине задней стенки, межжелудочковой толщине перегородки, диаметре левого предсердия, диаметре аорты, частоте сердечных сокращений, систолическом и диастолическом давление крови. Выводы . В общем, восемь недель аэробной непрерывной тренировки и периода отдыха могут оказывать неблагоприятное воздействие на структуру левого желудочка и функции сердца.