Yazar "Yamaner, E" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Acute beetroot juice supplementation enhances judo-specific performance, explosive power, and muscular strength in recreational adolescent judokas: a randomized crossover trial
    (FRONTIERS MEDIA SA, 2025) Demirli, A; Gökçelik, E; Moghanlou, AE; Ocak, MH; Terzi, M; Yamaner, E; Atıcı, M; Akyüz, Ö; Toy, AB
    Objective: Dietary supplementation with beetroot juice (BRJ), rich in nitrate, enhances nitric oxide bioavailability and may positively influence exercise performance. However, the impact of acute BRJ ingestion on judo-specific performance has not been investigated. The aim of this study was to determine the acute effects of BRJ on judo-specific performance, explosive power, back-muscle strength, and handgrip strength in recreational adolescent judokas. Methods: Thirty-five male adolescent recreational judokas completed a randomized, double-blind, placebo-controlled crossover trial, consuming either 140 mL of BRJ (similar to 12.8 mmol nitrate) or a placebo, with a 7-day wash-out. In each session, after a 4-min randori, athletes performed the Sargent jump test, back-strength dynamometer pulls, handgrip dynamometer trials, and the Special Judo Fitness Test (SJFT), with a 10-s rest between each performance. Results: Compared to placebo, BRJ significantly increased explosive jump height (+3%, p < 0.05), back-muscle strength, (+3.2%, p < 0.01), handgrip strength (+8.4%, p < 0.01), and total SJFT throws (+2.4%, p < 0.05), while reducing 1-min post-SJFT heart rate (-7.9 bmin(-1), p < 0.001) and improving the SJFT index (-4%, p < 0.001). Immediate post-SJFT heart rate and perceived exertion did not differ between conditions (p > 0.05). Conclusion: Acute BRJ is a practical, natural ergogenic aid for adolescent judokas, enhancing explosive power, muscular strength, and judo-specific performance. These findings support the use of nitrate supplementation as an ergogenic aid for young athletes engaged in high-intensity, intermittent exercise activities.
  • [ X ]
    Öğe
    Exploring how cognitive-behavioral physical activity links ruminative thinking and mental wellbeing in sports high school adolescents
    (FRONTIERS MEDIA SA, 2025) Derelioğlu, M; Vural, M; Çimen, E; Sakı, Ü; Saraçoğlu, YY; Karataş, B; Saç, A; Yamaner, E; Halmatov, M; Yılmaz, C; Öztaş, M; Arıkan, G; Ceylan, L
    Introduction: This study examined the associations among ruminative thinking style (RTS), subjective wellbeing (SWB), and cognitive-behavioral physical activity (CBPA) in a sample of 1,326 adolescents (aged 14-18) from sports high schools. Method: Using validated self-report measures, data were analyzed through bootstrapped mediation models. Results: RTS was negatively associated with SWB (beta = -0.1792, p < 0.001), while CBPA showed a partial mediating effect in this relationship (indirect beta = 0.0779, p < 0.001). Discussion: These results suggest that cognitive-behavioral orientations toward physical activity may buffer the negative impact of rumination on wellbeing. Consistent with cognitive-behavioral therapy (CBT) principles, CBPA could provide adolescents with self-regulatory strategies that support mental health. However, the cross-sectional and self-report design, as well as the focus on sports high school students, limit causal inference and generalizability. Future longitudinal and cross-cultural studies are needed to confirm these findings. Overall, the study provides preliminary evidence that CBPA-informed approaches may hold promise for promoting adolescents' mental wellbeing.