Special Issue: Diet and nutraceuticals for mental and physical performance in athletes. (Special Issue: Diet and nutraceuticals for mental and physical performance in athletes.)

This supplement containing 7 articles stresses the importance of diet and selected nutraceuticals that may impact both the physical and mental performance of athletes. The past 2.5 years living with the coronavirus disease 2019 pandemic have taxed all of us mentally and possibly to a greater extent in the athletic population. While life in general has returned to some form of normalcy for many, emerging from this pandemic has alerted us to the importance of vaccines and physical-distancing measures, especially as they relate to sport. The return of organized sport at all levels has also underscored the important roles that exercise and sport play in the lives and mental health of everyone, including athletes. The goal of this supplement is to provide recent information that will help athletes achieve optimal physical and mental performance in their chosen sport.

Event satisfaction and interdependent happiness in sports volunteers: focused-on a triathlon event during the COVID-19 pandemic

Sports volunteers play an important role in sports event management. There are various motivations for the participants of sports volunteer activities. In particular, the occurrence of sports events has significantly decreased due to the impacts of COVID-19. At the same time, consideration should be given as to whether it is possible to find value and reward from volunteer activities or not. The purpose of this study was to investigate the relationship between event satisfaction and interdependent happiness in sports volunteers. This research focused on sports volunteers of the 2021 Asia Triathlon Championships Hatsukaichi. The data was collected from 163 participants, with a significant response rate of 48.9%. The average respondent age was 54.0 years old, 123 respondents were male (75.5%), and 40 respondents were female (24.5%). The result of multiple regression was significant (F = 3.28, p < .01) and it accounted for 20% of the interdependent happiness. The predictors of socio-demographics were not deemed significant. On the other hand, event satisfaction was significant (p < .01) with regard to independent happiness. This research utilized the relationship between event satisfaction and independent happiness through structural equation modeling. The result of Structural Equation Modeling was significant at the .10% level. In sum, event satisfaction was significant in regard to independent happiness. This result shows a possibility to help understand the value of sports volunteers. Additionally, sports events in the community are expected to have not only an economic impact, but also, contribute to the sustainable social developments of the community.

Paralympic boccia in Brazil: use of coping strategies by athletes during the COVID-19 pandemic

The measure of physical isolation adopted during a pandemic affected the daily routine of the whole world, including in the sports environment. Therefore, the study sought to compare the coping strategies used by Paralympic boccia athletes during the pandemic period. The sample consisted of 43 athletes (30 men and 13 women) aged 29.95-11,76 years. To identify and measure coping strategies, the ACSI-28 (athletic coping skills inventory) questionnaire was used in its version adapted to Portuguese and added to an electronic form. In data analysis, normality was verified by the Shapiro-Wilk test. After that, all inferential comparison analyzes were measured via nonparametric statistical tests with paired post-hoc DSCF tests. Thus, the results showed that there were significant differences between comparisons in terms of experience, "+10 years", "5 to 10 years", and "1 to 3 years" on the subscales "goals and mental preparation" (6.00+or-1.75 vs 5+or-1.50 vs 5+or-1.50;p<0.05;ES: 0.26) and "trainability" (9.00+or-3.25 vs 6.00+or-0.500 vs 8.00+or-3.00;p<0.05;ES: 0.19). More and less experienced athletes in the boccia modality showed superiority in facing the pandemic period, as they obtained better indices in the "goals and mental preparation and trainability" dimensions of coping strategies compared to their peers with less experience.

A comparative study of the competitive balance of the Spanish and English top football leagues on the basis of sport performance during the four last seasons before the Covid-19 pandemic

The topic of this study has been the examination and comparison of the competitive balance of the Spanish and the English first leagues of soccer, called La Liga Santander and Barclays Premier League. The basis for the research project has been provided by a database of sixteen hundred elements, containing the data of the two leagues starting from the 2014/2015 season up to the 2017/2018 season. When choosing the time period for the study, we intended to avoid having to deal with the impact of Covid-19, which is why we picked exactly these competition seasons. We have primarily used statistical indicators. In the case of sports-related data, our inquiries have included the following: comparing and averaging the winning percentages per season, furthermore, the winning percentages of championship seasons, the distribution of goals scored and conceded and, finally, the calculation of the Herfindahl-Hirschman Index. Although there is one aspect of investigation according to which the competition balance of La Liga is closer to the optimal, the dispersion of winning percentages and the indicator of the goals conceded as well as the HHI index show that the Premier League is the more balanced competition of the two. © 2022 The Author(s).

Effects of application of sports management during the pandemic COVID-19 to international top sports clubs football and ultimate fight championship

Review paper Effects of Application of Sports Management during Pandemic COVID-19to International Top Sports Football Club and Ultimate Fight Championship, based on the latest studies, relates to performance of structure of management of sport organizations during pandemic of COVID-19. Organizing sport competitions, tournaments, matches and trainings at this period of time, was considered as a great challenge, especially for the clubs which compete on international level. Additional challenge for sport organizations was compliance with epidemic measures dictated by WHO (World Health Organization). Focus analysis was related to organizing sport contents and responds to business and sports activities to pandemic of COVID-19 of international top-level sport football clubs, league of "five" and clubs of Ultimate Fight Championship. Analysis included of football clubs: F.C. Barcelona, F.C. Manchester United, AC Milan, F.C. Bayern M..nchen and F.C. Borussia Dortmund in relation to UFC teams: Straight Blast Gym Ireland, American Kick-box Academy (AKA), Xtreme Couture Mixed Martial Arts, American Top Team (ATT) of football and ultimate fight championship, during pandemic. Clubs, selected by method of random subject, based on sport results achieved on national levels of competition and four criteria were used, from domain of review papers, by PRISM methodology 1: all sources of data (magazines, published papers etc) in English;2. Period of organization of sport competitions and football matches during the pandemic of COVID-19;3. Evident differences, which occurred during pandemic COVID-19;4. Published papers are focused on business and organizational form. There is significant difference in obtained financial effects and different innovative solutions, which can be used as new experiences in further studies, were offered.

Anxiety status of junior archers in COVID-19 during training isolation period towards the shooting performance

Studies have indicated that the COVID-19 pandemic has had miserable effects on athlete performance due to the movement control order (MCO) announced by the Malaysia Government. Dealing with self-training without the coach's guidance leads the archers to lose concentration, diminished self-confidence, and elevated anxiety levels. These factors contribute to inconsistent shooting performance. This study attempted to identify the archer's anxiety status during the training isolation period on the shooting performance. A total of 32 participants from the recurve archery category were recruited and enrolled in a web-based cross-sectional study during the MCO. The CSAI-2R instrument was applied to participants to examine the psychological aspect. Training Isolation resulted in a significant effect on anxiety status and shooting performance. Analysis from CSAI-2R, low-level archers, indicated 5% more anxiety than top-level archers for both cognitive and somatic anxiety sub-component. In contrast, Top archers revealed a higher self-confidence mean of 2.32 (moderately high) than low archers (1.38). The result shows improvement in anxiety and score performance with complete online monitoring and coaching supervision first session until the 8th session. These findings could assist sports institutions in improving a better training experience and understanding the pandemic's impact on athletes' mental health during home isolation. © 2023, Intelektual Pustaka Media Utama. All rights reserved.

The influence of the COVID-19 pandemic on physical activity in girls

Objective. This study complements other studies previously conducted and aims at determining the current level of physical activity in girls in the current pandemic context, the data obtained being compared with the mentioned studies. Methods. The research was conducted in 2022 on a number of 60 girls between the ages of 19 and 35 and was based on a questionnaire that shows the Physical Activity Index. The mentioned questionnaire has three parameters (intensity, duration and frequency) and is calculated very easily by multiplying the scores from each parameter, resulting in a value that shows us a score that can be interpreted according to a given appreciation grid. Results. The results obtained show that, with the exception of the frequency parameter, all parameters and the Physical Activity Index decreased in 2022 compared to the other years researched, the difference between the best value of the Physical Activity Index and that obtained in 2022 being over 10 points, which shows us that the pandemic situation has affected us all, regardless of age, the girls being classified as insufficiently active/relatively sedentary, with a category of poor physical condition. Under the given conditions, it is recommended that the physical activity to be carried out permanently, even if this is done at home, at the office (during break), in the park, etc., and it can be done in the form of stretching, walking, running, fitness, etc. Movement containment measures taken during the COVID-19 pandemic have also had a negative effect on physical activity, the impossibility of leaving the house or certain restrictions that have been taken have caused regular physical activity to suffer. Conclusions. Realizing that during the pandemic it is quite difficult to be an active person by diminishing opportunities, I believe that a regular schedule of physical activity can be maintained, which is a matter exclusively for the person concerned, the formation of a daily routine in which involves movement being recommended, by this maintaining a state of well-being felt by those who achieve this.

The Influence of Nutrition and Physical Activity on Exercise Performance after Mild COVID-19 Infection in Endurance Athletes-CESAR Study.

COVID-19 and imposed restrictions are linked with numerous health consequences, especially among endurance athletes (EA). Unfavorable changes in physical activity and nutrition may affect later sports and competition performance. The aims of this study were: (1) to assess the impact of COVID-19 infection and pandemic restrictions on the nutrition and physical activity of EAs and (2) to compare them with the results of cardiopulmonary exercise testing (CPET). In total, 49 EAs (nmale = 43, nfemale = 6, mean age = 39.9 ± 7.8 year., height = 178.4 ± 6.8 cm, weight = 76.3 ± 10.4 kg; BMI = 24.0 ± 2.6 kg·m−2) underwent pre- and post-COVID-19 CPET and fulfilled the dietary and physical activity survey. COVID-19 infection significantly deteriorated CPET performance. There was a reduction in oxygen uptake and in heart rate post-COVID-19 (both p < 0.001). Consuming processed meat and replacing meat with plant-based protein affected blood lactate concentration (p = 0.035). Fat-free mass was linked with consuming unsaturated fatty acids (p = 0.031). Adding salt to meals influenced maximal speed/power (p = 0.024) and breathing frequency (p = 0.033). Dietary and Fitness Practitioners and Medical Professionals should be aware of possible COVID-19 infection and pandemic consequences among EA. The results of this study are a helpful guideline to properly adjust the treatment, nutrition, and training of EA.

The silence of the fans: the impact of restricted crowds on the margin of victory in the NBA

This study investigates the impact of restricted crowds caused by the COVID-19 pandemic on the margin of victory of games in the NBA. Using 12,500 game-level observations from 11 NBA seasons from 2010/11 to 2020/21, the study first shows that during the COVID-19 season of 2020/21, games had a greater average margin of victory than any of the prior seasons. Regression results reveal that games played in front of restricted crowds were more likely to be won by a margin of 15, 20, or 25 points than games played in front of non-restricted crowds. The results indicate similar effects for games played in an empty arena or in front of a small crowd. Implications for the NBA and other major team sports leagues are discussed.

Spanish Pre-Olympic Athletes' Motivations and Barriers to Pursuing Dual Career as a Function of Sociodemographic, Sport and Academic Variables.

The dual career allows elite athletes to attain their maximum competitive and academic performance, but the COVID-19 pandemic hindered their development and changed their perception of the importance given to the sporting and educational environment. For this reason, the aim of the present study was to determine the differences in the motivations and perceived barriers, the importance given to academic qualifications, and the perception of the dual career from a multifactorial perspective, of elite athletes according to sex, type of sport practiced, job performance, time of sports career, type of athlete, and type of scholarship received. A total of 100 student-athletes participated in the research study by completing the "Perceptions of dual career student-athletes" questionnaire. The results showed that athletes from individual modalities (p = 0.012) and those who did not receive any scholarships described more barriers (p < 0.001). In addition, women studied more because they enjoyed it (p = 0.007); athletes from individual modalities studied to work later (p = 0.008); athletes who do not work perceived a greater influence between study and sports performance (p = 0.029); at the beginning and at the best stage of their sports career, a greater influence of academics on performance was perceived (p = 0.016); and athletes who considered themselves professionals, and athletes who did not receive any scholarships (p = 0.025), reported that the conciliation between sports and academic life was difficult (p = 0.034). The results obtained point to the importance of dual career scholarships for student-athletes, as well as the need for the programs implemented for these athletes to consider sex, sport modality or type of scholarship granted.

Evaluating the impact of concentrated match scheduling in college volleyball during the COVID-19 pandemic

Athletic conferences worked to lower the cost of delivering athletic programs while operating during the COVID-19 global pandemic. One strategy was the use of concentrated schedules for competitions. For example, the Sun Belt Conference focused on divisional play and a concentrated schedule for women's volleyball for the 2020 season. Schools played three matches in a two-day period against the same team. This practice lowered travel costs and isolated player contact in the event of needed contact tracing as part of player safety protocols. This study evaluates the impact of this scheduling format on player performance and the overall quality of competition. Gathering data from the box scores from all Sun Belt Conference volleyball matches, the impact of player fatigue (daily and cumulative) is not present in the team statistics. Player performance and the overall quality of team play did not decline, even when playing three matches in a two-day period. Conference personnel and university athletic administrators may take comfort that their efforts to lower costs and ensure player safety during a global pandemic did not affect player performance and the overall quality of competition. It remains to be seen if this new scheduling approach will be used in the post-COVID period in women's volleyball and possibly expanded to other sports. The need to control/lower operating costs will not disappear. This constraint may lead to the adoption of new conference scheduling formats in the future.

Running Patterns in LaLiga Before and After Suspension of the Competition Due to COVID-19.

In the first wave of the COVID-19 outbreak (spring 2020), the first division of professional soccer in Spain (LaLiga) was suspended for 12 weeks as part of the lockdown imposed by the Spanish health authorities. Professional soccer players were confined to home for 8 weeks and then a retraining period of 4 weeks was set before the first competitive match. When competition was resumed, professional soccer teams competed in a congested calendar (11 matchdays in 39 days) while some in-game regulations were altered (up to 5 substitutions, refreshment pauses). The current research presents an analysis of running patterns before suspension and after resumption of LaLiga to determine how the lockdown affected players' physical performance. To aid in this purpose, a pairwise comparison was performed of running patterns of the 2019-2020 vs. 2018-2019 season (i.e., control season). Using a two-way ANOVA (season x matchday), it was found that there was no main effect of the season on total running distance per match (P = 0.288) nor in the distances covered < 14.0 km/h (P = 0.294), at 21.0-23.9 km/h (P = 0.266), and at ≥ 24.0 km/h (P = 0.112). Only the distance at 14.0-20.9 km/h was affected by the season (P = 0.019) with a lower running distance on matchday 34 in the 2019-2020 vs. 2018-2019 season. The number of substitutions (from 2.9 to 4.5 substitutions per game; P < 0.001) and match duration (96 vs. 100 min; P < 0.001) significantly increased after resumption respect to the previous season. These data suggest that high-intensity running performance of professional soccer teams was maintained after the resumption of the competition while the alterations likely aided in the in-game regulations facilitated the maintenance of soccer physical performance.

Losing the Home Field Advantage When Playing Behind Closed Doors During COVID-19: Change or Chance?

Due to restrictions against the COVID-19 pandemic, spectators were not allowed to attend soccer matches at the end of the 2019/2020 season. Previous studies suggest that the absence of a home crowd changes the home field advantage in terms of match outcomes, offensive performance, and referee decisions. However, because of the small sample sizes, these changes may be random rather than meaningful. To test this, we created 1,000,000 randomized samples from the previous four seasons with the exact same number of matches played behind closed doors in Europe's four most elite soccer leagues at the end of the 2019/2020 season. We found that across countries (Germany, Spain, Italy, and England), performance indices and referee decisions (except red cards) indeed changed to the detriment of the home team beyond the level of chance. However, this overall pattern could be ascribed to specific countries. Most importantly, the proportion of points won by the home teams declined significantly only in Germany, which was accompanied by a meaningful increase in (1) the proportion of goals scored by the away teams and (2) the proportion of yellow cards given to the home teams. We conclude that the home field advantage may indeed be lost when spectators are absent. However, in future studies, more detailed behavioral analyses are needed to determine the robustness and the behavioral determinants of this phenomenon across leagues and countries.