Frontiers in Sports and Active Living最新文献

Objective: The purpose of this systematic review and meta-analysis was to investigates whether transcranial direct current stimulation applied during physical training increases muscle strength in comparison with sham tDCS combined with physical training.

Methods: Randomized controlled trials of the effects of tDCS combined physical training intervention on muscle strength and cortical excitability were collected by searching Web of Science, Pubmed, EBSCO, CNKI. The retrieval date ends in April 2024. 11 randomized controlled trials are finally included. The total sample size of the study is 338. The experimental group was subjected to tDCS combined with physical training intervention, and the control group was physical training combined with sham tDCS intervention.

Results: There is a significant increase in maximal strength (SMD = 0.38; 95% CI: 0.09, 0.67; p = 0.01) and lower limb explosive strength (MD = 2.90; 95% CI: 1.06, 4.74; p = 0.002) when physical training was performed with tDCS, but not following physical training combined with sham tDCS. Subgroup analysis of the subject population showed an increase in muscle strength in those with training experience following tDCS combined with physical training (SMD = 0.39; 95% CI: 0.08, 0.70; p = 0.01), but not for those without training experience (SMD = 0.29; 95% CI: -0.06, 0.63; p = 0.10). Motor evoked potential (MEP) wave amplitude increased significantly following physical training with tDCS (SMD = 0.71; 95% CI: 0.18, 1.24; p = 0.008), but was not different between groups (SMD = 0.16; 95% CI: -0.33, 0.65; p = 0.52).

Conclusions: tDCS combined with physical training intervention can improve muscle strength, lower limb explosive strength and cerebral cortex excitability. Compared to tDCS combined with training of small muscle groups, tDCS combined with training of large muscle groups was more effective in improving muscle strength. Muscle strength was more likely to improve after tDCS combined with physical training in people with physical training experience compared with people without physical training experience. The combination of tDCS with physical training intervention and the sham-tDCS with physical training intervention both increased cortical excitability.

Systematic review registration: https://www.crd.york.ac.uk/, PROSPERO, identifier (CRD42024550454).

The importance of sports and the approval of the Dual Career regulation at the University of Rome "Tor Vergata" are highly significant topics for the well-being and personal development of students. In line with European and international policies, this initiative recognizes the specific needs of student-athletes by offering them tools and flexibility to excel in both sports and academics. However, monitoring student-athletes by Universities requires thorough investigations and the development of initiatives to promote students' adherence to sports practice. Therefore, our study aims to analyze the results of a survey administered to students enrolled at the University of Rome "Tor Vergata" during the academic years 2020/2021, 2021/2022, 2022/2023, and 2023/2024, investigating the effects of the introduction of the Dual Career regulation on the student population. Our preliminary results showed that the introduction of the Dual Career program was associated with a significant increase in the number of students practising sports over the academic years, with greater participation in the academic years 2022/2023 and 2023/2024. Noteworthy, the number of student-athletes who applied to the Dual Career program markedly increased in the last year, with the highest number of enrollments in the macroareas of Medicine and Surgery, Economy, and Engineering. Overall, the Dual Career regulation offers the possibility to plan the study path in a personalized way, dedicated academic support, and flexibility in deadlines, making the University of Rome "Tor Vergata" a model of integration between education and sportiness.

This study investigated whether repeated transitions between seated and standing positions has a different physiological response compared to continuous use of either seated position or standing position during steep uphill cycling among elite cyclists. Ten elite male cyclists completed three 5-min treadmill cycling tests at an inclination of 6.8° with constant individual-based speed resulting in a work intensity close to the aerobic threshold. During the first and third test, the participants used standing position (ST test) and seated position (SE test) or vice versa, whereas in the second test, they made repeated transitions between standing and seated positions every 10 s (RT test). The last 2 min of each test was used to measure the mean values of oxygen uptake (V̇O₂) and respiratory exchange ratio, which were used to calculate the metabolic rate (MR) and gross efficiency (GE). Additionally, the blood-lactate concentration before and after (La_post) each test was determined. One-way repeated measures ANOVA was used to determine the effect of cycling position on the physiological response. No significant differences between tests were observed for the variables related to aerobic energy expenditure (i.e., V̇O₂, MR and GE), whereas the RT test was associated with a significantly lower La_post compared to the ST and SE tests. Steep uphill cycling, at an intensity close to the aerobic threshold, with repeated transitions between standing and seated positions, did not have a higher oxygen consumption; instead, the blood-lactate concentration was lower during the RT test compared to that under continuous use of either seated or standing position.

[This corrects the article DOI: 10.3389/fspor.2024.1356577.].

Introduction: The study demonstrated the feasibility of incorporating RNA biomarkers, specifically 5-aminolevulinic acid synthase (ALAS2) and carbonic anhydrase 1 (CA1), to improve the hematological module of the Athlete Biological Passport (ABP) in routine antidoping context.

Objective: The aim was to investigate the implementation of reticulocyte (RET) related biomarkers, specifically ALAS2 and CA1, using quantitative reverse transcription polymerase chain reaction (RT-qPCR) on dried blood spots (DBS) from elite athletes. Hemoglobin changes over time in DBS samples was measured as well. Combining hemoglobin and messenger RNA (mRNA) analyses allowed to monitor alterations of the established marker, "DBS OFF-score".

Methodology: Ten athletes were selected for sampling by the Swiss national antidoping organization, Swiss Sports Integrity (SSI). Samples were collected, transported and analyzed for ABP following the World Anti-Doping Agency (WADA) procedures and spotted onto Protein Saver DBS cards.

Results: Most athletes exhibited stable biomarker levels, except for one individual involved in ski mountaineering, who demonstrated a sustained increase in ALAS2 compared to the individual baseline. This elevation could be due to blood withdrawal or other factors, such as doping with substances outside the targeted test menu.

Conclusion: In this study, RNA-biomarkers were successfully analyzed in routine blood samples, and the project demonstrated promising results for the implementation of ALAS2 and CA1 in routine analysis to complement the ABP.

Internationally, the implementation of holistic programs aimed at academic, financial and retirement preparation support for student-athletes who find themselves in dual careers, such as university students, has been widespread and intensified. However, little is known about the subject in the Brazilian national context, because although there are related studies, they are punctual and related to specific universities. In view of the above, this study aimed to investigate public policy aimed at student-athletes at Brazilian federal universities. This is an exploratory, qualitative, cross-sectional and documentary study, using the websites, internal regulations and public notices of 69 Brazilian federal universities for the year 2023, using the content analysis technique. The results indicate that 72.05% offer some kind of support to DC based on the holistic model, 66.17% of which is academic and 60.29% sports. Among the academic support, the flexibility of assessments (57.35%) and the differentiated treatment of absences (51.47%) were close. The sporting support is centered on partial payment of competition costs (60.29%) and athlete grants are restricted to 20.58% of universities. It can be concluded that Brazil's federal universities have policies that include support actions that integrate the holistic model (academic), with incipient coverage of scholarships (sports), but do not effectively follow the holistic model.

Introduction: The purpose was to examine the prevalence of low energy availability (LEA), explore dietary behaviors in men collegiate gymnasts (n = 14), and investigate the relationships between energy availability (EA), body composition, and plyometric performance.

Methods: Body composition was measured using air displacement plethysmography. Lower- and upper-body peak power (PWRpeak) and modified reactive strength index (RSI_mod) were calculated from countermovement jump (CMJ) and plyometric push-up (PP) assessments. Energy expenditure was tracked over 3 days, while daily energy and macronutrient intake were recorded. EA was calculated and used to categorize athletes into LEA and non-LEA groups. Pearson correlation coefficients were used to examine relationships between EA, body composition, and performance metrics.

Results: 85.7% of athletes (n = 12) exhibited LEA (20.98 ± 5.2 kcals/kg FFM), with non-LEA athletes (n = 2) marginally surpassing the <30 kcal/kg of fat-free mass (FFM) threshold (30.58 ± 0.2 kcals/kg FFM). The cohort (n = 14) consumed insufficient energy (30.5 ± 4.5 kcal/kg/day) and carbohydrates (3.7 ± 1.1 g/kg/day), resulting in LEA (22.36 ± 5.9 kcal/kg/FFM). EA was not correlated with body composition or performance metrics.

Discussion: A high prevalence of LEA may exist in men gymnasts, largely due to a low relative energy and carbohydrate intake.

This article aims to explore the evolution of the debates surrounding human rights in the discourse(s) of major sporting events (MSEs), particularly the Olympics. The paper will first analyse the western-centric origins of the "universality" of the Olympic philosophy and how it affected the protection and promotion of human rights, as well as addressing practical challenges or limitations faced. It will then focus on unpacking the elements of sportswashing and soft power in the multi-discursive context of sport where power, privilege, politics, and position are (re)produced. In doing so it draws upon the emergent field of Sports Diplomacy as the most appropriate explanatory framework to share in this discourse. Finally, it will explore the potential impact of anti-corruption reforms on the establishment of a meaningful human rights legacy.

Purpose: This research investigated the pre-, per- and post cooling strategies used by competitive tennis players from various levels of play who occasionally train and compete in hot (>28°C) and humid (>60% rH), and dry (<60% rH) environments.

Methods: 129 male tennis players (M_age = 24.9) competing at regional (N = 54), national (N = 30) and international (N = 45) levels, completed an online questionnaire regarding their use (i.e., timing, type, justification and effectiveness) of pre- (i.e., before practice), per- (i.e., during exercise) and post-cooling strategies when playing tennis in hot dry (HD) and hot humid (HH) conditions. Individual follow-up interviews were also carried on 3 participants to gain an in-depth understanding of the player's experience.

Results: Competitive tennis players used both internal and external cooling strategies to combat the negative effects of HD and HH conditions, but considered the HH to be more stressful than HD and experienced more heat-related illness in HH environments. International players used cold packs and cold towel more frequently than the regional and national players in hot environments, and used cold water immersion and cold vest more frequently than the latter in HH. Differences in strategy use were mostly observed during per-cooling where regional and national players more frequently used cold drinks than international players who more frequently used cold packs in HD and cold towel in HH conditions. Moreover the latter more frequently used cold towel, cold packs and cold water immersion as post-cooling strategies than regional players.

Conclusion: When playing tennis in the heat, it is strongly recommended to employ cooling strategies to maintain health, limit declines in performance, and promote recovery. We also recommend improving education regarding the appropriate use and effectiveness of cooling strategies, and increasing their availability in tournaments.