Video Sequence Analysis for On-Table Tennis Player Ranking and Analysis

With the rapidly developing of the scientific research in the field of sports, big data analytics and information science are used to carry out technical and tactical statistical analysis of competition or training videos. The table tennis is a skill oriented sport. The technique and tactics in table tennis are the core factors to win the game. With the endlessly emerging innovative playing techniques and tactics, the players have their own competition styles. According to the competition events among athletes, the athletes’ competition relationship network is constructed and the players’ ranking is established. The ranking can be used to help table tennis players improve daily training and understand their ability. In this paper, the table tennis players’ ranking is established their competition videos and their prestige scores in the table tennis players’ competition relationship network.

Fitness Of West Kalimantan Martial Arts PON Athletes: Independent Limited Exercise During Covid-19

Fitness is the ability and ability of the body to adjust to physical loading without significant fatigue. Physical activity is one way to create endurance and a fit body. Good endurance is very much needed by martial arts athletes, especially during this Covid-19 period, both in the daily training process and when competing. This study aims to analyze and determine the fitness level of athletes in martial arts during limited independent training, using a survey method in the form of descriptive research. The population is PON 2021 West Kalimantan athletes in martial sports, using a total sampling technique where the sample used is all athletes PON XX 2021 West Kalimantan in martial arts, totaling 12 athletes. The results of the fitness item test found that the average endurance ability was 42.69 (very poor category), average speed was 5.04 (poor category), average agility was 14.38 (enough category), average balance was 14.38 (enough category), average flexibility 18.59 (very good category). The conclusion from this study still needs special attention, especially in fixing some of the supporting elements of fitness that are still not in good condition, with a poor level of fitness it will have an impact on health, especially during the Covid-19 period so that it can affect the athlete's performance.

Ejercicios físicos diarios de intensidad moderada en el interior del aula mejora la fuerza de tren inferior y la agilidad en escolares: un estudio cuasi experimental (Daily moderate-intensity physical exercises inside the classroom improves lower body str

El estudio tuvo como objetivo determinar los cambios en la condición física y en el índice de masa corporal que se producen en una intervención de 16 semanas en escolares en . Setenta tres escolares (n=34 niñas; n=39 niños) con edad entre los 8 y 9 años recibieron las siguientes evaluaciones: flexibilidad de la musculatura dorsal de espalda (mediante la prueba de weels), fuerza muscular (mediante la prueba pararse y sentarse), agilidad (mediante la prueba 4x10m shuttle run) y índice de masa corporal (IMC) utilizando un estadiómetro y una balanza. Se aplicó un programa de entrenamiento con ejercicios de flexibilidad, fuerza y resistencia (30 minutos, 5x/semana). Hubo una disminución del IMC (diferencia de 0.60kg/cm2 en ambos géneros), aumento de la fuerza (10.4 repeticiones en niñas y 11.6 en niños) y mejora de la agilidad (0.91 segundos en niñas y 0.71 segundos en niños: p<0.05 en todas las comparaciones y tamaño de efecto entre 0.20-1.77 en niñas y 0.18-2.34 en niños). El índice de obesidad y sobrepeso entre el alumnado de la clase se vio reducido en un 5.3% y 5.9%, respectivamente. No hubo diferencias respecto a la flexibilidad (p>0.05). Un entrenamiento diario en el interior del aula sin implementación y en un espacio de un metro cuadrado , mejora la fuerza de tren inferior y la agilidad en escolares. Abstract. The objective of the study was to determine the changes in physical condition and body mass index that occur in a 16-week intervention in schoolchildren inside the classroom. Seventy-three schoolchildren (n=34 girls; n=39 boys) between the ages of 8 and 9 received the following evaluations: flexibility of the dorsal back muscles, through the weels test, muscular strength, through the standing and sitting test, agility, through the 4x10m shuttle test run and body mass index (BMI) using a stadiometer and scale. A training program was applied with flexibility, strength and resistance exercises were performed (30 minutes, 5x/ week). There was a decrease in BMI, (difference of 0.60kg/cm2 in both genders), increase in strength (10.4 repetitions in girls and 11.6 in boys) and improvement of the agility (0.91 seconds in girls and 0.71 seconds in boys), p<0.05 in all comparisons and effect size between 0.20-1.77 in girls and 0.18-2.34 in boys. The rate of obesity and overweight among the students in the class was reduced by one 5.3% and 5.9% respectively. There were no differences in flexibility (p>0.05). A daily training in schoolchildren without implementation and in a space of one square meter decreases BMI, improves lower body strength and agility in schoolchildren.

Basic Tools and Techniques for Assessing Strength and General Endurance

The desire of more and more segments of the population for self-improvement and self-expression through amateur sports has acquired a global scale. The evaluation and analysis of the amateur athletes’ achievements in the chosen physical activity become of practical importance for most amateur athletes and open up the possibility of developing innovative interventions to stimulate the engagement in physical activity of as much population as possible. For this purpose, we have developed an elementary methodology for monitoring the achieved level of strength and overall endurance of students, designed to monitor and motivate amateur athletes of various types of physical activity. The purpose of this research project was to conduct the targeted analysis of the array of physiological indicators of those engaged in physical activity, and also to justify and test technologies for collecting and interpreting objective indicators of performing elementary physical test exercises and calculating their dependence on objective indicators of the cardiovascular system. Subsequently, we planned to develop a simple methodology for collecting, evaluating, and interpreting test information. We suggest using this technique in the daily training sessions of amateur athletes of various qualifications.

COVID-19 Lockdown 2020 Changed Patterns of Alcohol and Cannabis Use in Swiss Elite Athletes and Bodybuilders: Results From an Online Survey

Objectives: During the COVID-19 pandemic, increased patterns of substance use have been reported in the general population. However, whether this also applies to athletes is not yet clear. This study aimed to detect changes in alcohol consumption and cannabis use in elite athletes and bodybuilders during the first COVID-19 lockdown in Switzerland.Methods: Between April 25 and May 25, 2020, a cross-sectional online survey was conducted among bodybuilders and Swiss elite athletes who were active in Olympic sports and disciplines approved by the International Olympic Committee (IOC) on at least the national level. The collected data included information on alcohol and cannabis use during the last month (lockdown) and in the year before COVID-19 lockdown (pre-lockdown), daily training times, existential fears on a scale from 1 to 100, Patient Health Questionnaire-9 for depression (PHQ-9), Insomnia Severity Index (ISI), and State-Trait Anxiety Inventory (STAI).Results:N = 275 athletes (elite athletes: n = 193; bodybuilders: n = 82) was included in this study. Both pre-lockdown and during lockdown, more bodybuilders used cannabis (both time points: p &lt; 0.001) than elite athletes, and more elite athletes drank alcohol (pre-lockdown: p = 0.005, lockdown: p = 0.002) compared to bodybuilders. During lockdown, fewer athletes drank alcohol compared to before, but those who continued drinking did so on more days per week (p &lt; 0.001, Eta2 = 0.13). Elite athletes were more likely to increase their drinking with 17.7 vs. 8.2% in bodybuilders. When compared to pre-lockdown measures, the number of athletes using cannabis did not change during lockdown. Only three of 203 elite athletes reported using cannabis during lockdown; this contrasts with 16 of 85 bodybuilders. In a multivariate regression model, existential fears and a lower ISI score were significant predictors for increased alcohol consumption during the lockdown in the entire sample. In a model based on elite athletes only, male sex and a lower ISI score predicted increased alcohol consumption. In a bodybuilder-based model, predictors of increased alcohol consumption were existential fears and trait anxiety.Conclusion: We suggest identifying athletes who are at risk for increased alcohol and cannabis use; we suggest this to be able to professionally support them during stressful times, such as the COVID-19 pandemic.

Ways of improving the method of control of coordination preparation of young athletes in playing sports

Today, there is a further increase in the demands for the effectiveness of competitive activities of athletes in playing sports. This, in turn, requires improving the individual skills of players. The factor of «technical-coordination» is one and the most important for achieving high sports results in sports games. Analysis of the scientific literature shows that there are no uniform standardized criteria for assessing the coordination abilities of young athletes. In the training process of representatives of play sports, mainly comprehensive tests are used to evaluate coordination preparedness, in which it is very difficult to assess the degree to which some form of coordination capability has been developed. When designing a test program to assess the coordination skills of players, it is necessary to rely on tests that assess the types of coordination abilities that are most relevant to a particular sport specialization. Given the difficulty of using instrumentation methods to study the coordination of movements in the daily training activities of players, motor tests continue to be the main way to assess the coordination abilities of young athletes in playing sports. This requires further improvement in their informativeness and reliability.

Fluctuations of Training Load Variables in Elite Soccer Players U-14 throughout the Competition Season

Excessive daily training load (TL) can affect the musculoskeletal system health of youth elite soccer players. The purposes of this study were (i) to describe the TL and session rating of perceived exertion (s-RPE) throughout the competition season; (ii) to analyze the weekly (w) differences of acute (daily) workload (wAWL), chronic workload (wCWL), acute–chronic workload ratio, training monotony (wTM), and training strain (wTS) among three periods over the season (early-, mid-, and end-season) by playing position; and (iii) to compare the TL variables during competition periods for the whole team. Twenty young elite soccer players in the under-14 category participated in this study. The game positions were considered as six wide defenders and wide midfielders (WM), five central defenders and central midfielders, and four strikers (ST). Daily monitoring was continued for 26 weeks during a full competition season. According to the league schedule, the season was divided into three periods: early-season from w1 to w8, mid-season from w9 to w17, and end-season from w18 to w26. The main results were that the higher TLs were detected in the early- and mid-season. There was a wAWL and wCWL decrease for all playing positions from early- to mid- and end-season, but the wCWL change was significant only from early- to mid-season (p ≤ 0.05). For all playing positions but ST, there was a considerable wTM increase from early- to mid-season. When compared with all other playing positions in terms of wAWL and wCWL, WM showed significantly greater values (p ≤ 0.05). Throughout the season periods, all workload indicators showed a considerable reduction, although there was a significant increase in the three other workload-derived variables (all with p ≤ 0.05) and namely: (i) wACWLR from mid- to end-season; (ii) wTM from early- to mid- and end-season; and (iii) wTS from early- to mid-season. Daily training load and s-RPE had significant fluctuations during all macrocycles of the competition season (p ≤ 0.05). In addition, in the mid-season, wTM and wTS were higher. Training load monitoring (in terms of, e.g., wAWL, wCWL, and s-RPE) could be the key for coaches of soccer teams to prevent overtraining and injury, especially in U-14 players, who are more susceptible to being affected by high workload.

Training Conditions and Emotional Impact on Spanish Olympic Swimmers and Rowers in Social Isolation due to COVID-19. Results of a Survey

This article analyzes the results of a survey conducted in 2020 with Spanish Olympic swimmers and rowers, who were confined to their homes due to the epidemiological crisis. The questionnaire was administered between 23 April and 25 May. Responses to the questionnaire on emotional and adaptive reactions during the COVID-19 confinement (REACOVID-19) were received from 88 subjects, who represented 100% of the total population of Spanish Olympic swimmers and rowers. Through this questionnaire, they were asked about their living conditions, their daily training habits and their psychological, cognitive and emotional adaptation during the confinement. The results show the commitment of these athletes to their sports goals and their responsibility in respecting the confinement rules. Sixty-seven per cent of them stated that they had not left their homes for 96 days. In these extreme circumstances, the majority trained an average of 11 to 13 hours a week and coped with the confinement with a positive attitude, in spite of the inconveniences of social isolation, the lack of equipment and technical support for training and the limitations of their physical space. The article analyzes which emotional and social factors influenced both their motivation and their hours of training.