Yazar "Alexios Batrakoulis" seçeneğine göre listele

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    The acute effects of simulated hypoxic training at different altitudes on oxidative stress and muscle damage in elite long-distance runners
    (PeerJ, 2025-05-12) Mücahit Sarikaya; Beyza Öğe; Nuri Mert Embiyaoğlu; Muzaffer Selçuk; Vedat Çınar; Salih Öner; Yıldırım Gökhan Gencer; Mehdi Aslan; Mustafa Sencer Ulema; Yunus Emre Yarayan; Kadir Keskin; Nouf H. Alkhamees; Bodor Bin Sheeha; Gerasimos V. Grivas; Sameer Badri AL-Mhanna; Alexios Batrakoulis
    Background: Understanding the impact of altitude on muscle damage and oxidative stress is essential for optimizing training and recovery strategies for athletes exposed to high-altitude conditions. Therefore, this study aimed to investigate the effects of acute exercise at different altitudes on oxidative stress and muscle damage. Methods: A total of twelve elite long-distance runners (mean age: 20.3 ± 1.5 years) from different branches participated in the study. The exercise protocol was the Bruce submaximal treadmill exercise test, which was conducted under three simulated hypoxic conditions (at 1,700 m, 2,450 m, and 3,200 m) and one normoxic condition (sea level). All measurements took place at the same time of the day. After the exercise protocol, 5 ml venous blood samples were taken from the participants, while heart rate and oxygen saturation were monitored at the 3rd, 6th, 9th, and 12th minutes during the exercise. Results: Significant altitude-dependent variations were observed in oxidative stress markers, with total oxidant status (TOS) (p = 0.017) and malondialdehyde (MDA) (p < 0.001) levels increasing at higher altitudes, while total antioxidant status (TAS) (p < 0.001) exhibited an elevation and oxidative stress index (OSI) (p < 0.001) demonstrated a decline as altitude increased. However, no significant difference was found in creatine kinase (CK, p = 0.059) levels. Additionally, there were significant differences in the oxygen saturation measurement taken at the 3rd (p < 0.001), 6th (p < 0.001), 9th (p < 0.001), and 12th (p < 0.001), minutes following the exercise session. There was no difference in the pulse measurement taken at the 3rd and 12th minutes, but a difference was observed at the 6th and 9th minutes post-exercise (p < 0.01). Conclusions: In conclusion, the study determined that endurance exercises performed under simulated normobaric hypoxia at different altitudes increased TAS and reduced OSI in elite long-distance runners. The increase in TAS and the reduction in OSI were more pronounced at higher altitudes, particularly at 2,450 m and 3,200 m, compared to sea level. These findings highlight the need for altitude-specific training and recovery strategies to minimize oxidative stress and muscle damage in athletes.
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    The role of athletic mental energy in the occurrence of flow state in male football (soccer) players
    (Springer Science and Business Media LLC, 2025-03-18) Yunus Emre Yarayan; Alexios Batrakoulis; Nuri Berk Güngör; Serkan Kurtipek; Kadir Keskin; Okan Burçak Çelik; Doğukan Batur Alp Gülşen; Gerasimos V. Grivas; Sameer Badri Al-Mhanna; Nouf H. Alkhamees; Bodor Bin Sheeha; Abdullah F. Alghannam
    Background: This study examines the determinant role of athletic mental energy on the flow state in professional football (soccer) players. This research fills an important gap in the sports psychology literature by focusing on the interaction between mental energy and flow, a critical component of optimal performance. Methods: Accordingly, 254 male athletes (Mean age = 23.1 ± 5.4 years) voluntarily participated in the study. This study was designed with the relational survey model, one of the quantitative research models. Athletic Mental Energy Scale and Dispositional Flow State Scale-2 were used as data collection tools. After confirming the validity and reliability of the scales, the data were analyzed. In this study, blank data were first evaluated to check the suitability of the analysis and assumptions. After the structure of the scales was verified, firstly, when the skewness kurtosis values for the normality test were examined, it was deter-mined that the data were suitable for normal distribution as the values were between - 1.5 and + 1.5 and the Q-Q graph did not show deviations from the distribution. In this context, Pearson Correlation Analysis was used to determine the relationship between athletic mental energy and flow state, and structural equation modeling (SEM) analysis was used to determine the determinant role of mental energy. Mental energy significantly predicted the flow state (β = 0.81, p < 0.05), and the SEM results indicated a good model fit (χ²/df = 2.96, RMSEA = 0.08, GFI = 0.89, CFI = 0.90). Results: When the findings obtained from the research were analyzed, it was determined that athletic mental energy was a determinant of flow and contributed to 66% of the variance. Conclusion: As a result, it supports that athletes' mental energy levels play an important role in their performance and contribute to the increase of optimal performance mood. These findings suggest that coaches and sports psychologists should focus on strategies to enhance athletes' mental energy levels, such as incorporating mental skills training into their routines. The study emphasizes the importance of athletes' ability to manage their mental energy levels and the development of strategies to increase optimal performance mood. By providing evidence for the link between mental energy and flow, this study contributes to advancing the understanding of performance optimization in professional sports.