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    Assessing Motor Performance and Ankle Mobility in Pre-Adolescent Male Fencers
    (Mdpi, 2025) Aydin, Yalcin; Tokgoz, Gurkan; Yilmaz, Nurkan; Coskun, Ilgin Ali; Beykumul, Aysegul; Colak, Enes; Aygoren, Caner
    Ankle mobility plays a critical role in dynamic stability and propulsion during fencing-specific actions. However, its relationship to performance metrics in young athletes remains unclear. This study aimed to investigate the relationship between ankle range of motion (ROM), acceleration, and jump height in pre-adolescent male fencers, as well as to examine bilateral differences in ankle mobility between the front and rear foot. Fifteen fencers (age 10.86 +/- 0.91 years) were assessed for ankle ROM (dorsiflexion, plantar flexion, inversion, eversion) using a goniometer. Performance tests included a 7 m sprint lunge (acceleration) and countermovement jump. Significantly large correlations were observed between front and rear foot ankle plantar flexion range of motion and both acceleration (r = 0.625-0.628, p < 0.05) as well as vertical jump height (r = 0.579-0.647, p < 0.05). Rear foot ankle plantar flexion range of motion significantly predicted acceleration (r(2) = 0.335, p < 0.05) and jump height (r(2) = 0.418, p < 0.05). In contrast, no meaningful associations were found between dorsiflexion, inversion, or eversion range of motion and performance metrics. Additionally, bilateral comparisons revealed significantly greater dorsiflexion in the front foot ankle and greater eversion in the rear foot ankle (p < 0.05). Plantar flexion ROM is a key contributor to acceleration and jump capacity in youth fencers. Incorporating ankle mobility training may support physical development in this population.
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    Maximal strength, sprint and jump performance in elite kumite karatekas
    (Bmc, 2025) Cinarli, Fahri Safa; Aydogdu, Onur; Aydin, Yalcin; Tokgoz, Gurkan; Kahraman, Abdulselam; Beykumul, Ayseguel; Aygoren, Caner
    Background Both maximal muscle strength and muscle power are independently important for karatekas. However, the relationship between strength and power in elite male kumite karatekas is under researched. This study aimed to determine the relationship between back-leg-chest (BLC) isometric muscle strength with sprint and jump variables in elite male karatekas. Methods Male elite/international level (tier 4) kumite karatekas (n = 14; age, 20.79 +/- 1.67 year; height, 1.77 +/- 0.06 m; weight, 72.21 +/- 5.20 kg) were recruited. BLC strength, sprint and jump values were measured with a dynamometer, a photocell, and an application, respectively. Pearson correlation (trivial r < 0.1; small r < 0.3; moderate r < 0.5; large r < 0.7; very large r < 0.9; nearly perfect/perfect r >= 0.9) and linear regression analyses were performed to determine the relationship and shared variance between BLC strength, sprint, and jump performance. Results There were large to very large correlations between BLC strength and sprint time (r = - 0.930, p < 0.01), velocity (r = 0.918; p < 0.01), acceleration (r = 0.913; p < 0.01) and running momentum (r = 0.721; p < 0.01). Additionally, BLC strength correlated with jump height (moderate, r = 0.550, p < 0.05), peak anaerobic power (moderate, r = 0.672, p < 0.01) and power to body mass ratio (moderate, r = 0.545, p < 0.05). BLC strength and sprint variables showed an r(2) = 0.52-0.86 (p < 0.01), while BLC strength and jump variables showed an r(2) = 0.29-0.45 (p < 0.05). Conclusions BLC strength is related to jump and sprint performance in male elite karate athletes. This relationship underscores the importance of including strength training that targets BLC muscle strength in training programs for coaches and athletes.