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Article Effect of COVID-19 Infection on the Performance of Elite Adolescent Overhead Athletes(SAGE Publications Ltd, 2025) Uluǧ, Naime; Kodak, Seyde Büşra; Kodak, Muhammed Ihsan,; Karahan, Zehra Can; Kiliç, ErdenBackground: COVID-19 might have a negative impact on sports performance. There are few studies in the literature that assess how the sports performance of adolescent athletes is affected by COVID-19. Objective: This study aimed to compare the sports performance of adolescent overhead athletes who had COVID-19 infection with those who had not. Methods: The study involved adolescent elite overhead athletes from basketball, volleyball, handball, and tennis. Athletes’ performance were assessed using core muscle endurance, hand grip strength, upper extremity functional performance, reaction time and agility performance, and the 3-min step test. Results: Study included 47 adolescent overhead athletes (mean age 15.15 ± 1.51 years). The COVID-19 group showed significantly higher Borg Scale scores and decrease in oxygen saturation levels only after the step test (p = 0.02, p = 0.02, respectively). Additionally, COVID-19 group had lower grip strength in both right and left hands compared to the non-COVID group (p = 0.01, p = 0.05, respectively). No significant association was found between core muscle power and endurance, upper extremity functional performance, reaction time and agility performance (p > 0.05). Conclusions: Our results showed reduced hand grip strength and increased fatigue following COVID-19 infection in adolescent overhead athletes. Time period after COVID-19 infection had a negative correlation with sports performance and core endurance. © 2025 Elsevier B.V., All rights reserved.Article Citation - WoS: 1Citation - Scopus: 1Does Reformer Pilates Exercise Improve Cognitive Functions in Sedentary Women? a Randomized Controlled Study(Elsevier, 2024) Ozeren, Aysenur; Ulug, Naime; Sahan, Nilay; Karahan, Zehra CanBackground: The reformer is an apparatus on which to perform the foot work and the body in a comfortable, nonweight-bearing supine position and keeps the muscles in balance. The aim of this randomized controlled and single-center study was to investigate the effect of reformer Pilates exercises on cognitive functions in sedentary women. Methods: A total of 44 sedentary women aged between 24 and 50 were randomized into two groups. The reformer Pilates group received a 6-week exercise program (45 min/twice per week), while the control group didn't receive any exercise program. Outcomes measured before and after the interventions were, right/left discrimination and scores of two questionnaires: Stroop Test and The Pittsburgh SleepQuality Index. Results: Reformer pilates group showed significant improvement in terms of the Stroop Test (STROOP) "STROOP-B" (t0 = 156; p < 0.05; Cohen d = 0.12), "STROOP-C" (U = 144.5; p < 0.05; Cohen d = 1.13) and "STROOP-D" (U = 165; p < 0.05, Cohen d = 0.40) when compared to control group. In the comparison of the results of the right-left separation in both groups, the difference values were not statistically significant (p > 0.05). Similarly, in the both groups the sleep quality of the individuals improved, but the difference was not statistically significant (p > 0.05). Conclusion: The results of the current study suggest that Reformer Pilates exercises may be more effective on cognitive functions compared to no exercise intervention in sedentary women. Clinical Trial Number: NCT05932004.
