Comparison of DNS-Based Developmental Exercise and Single Leg Squat Exercise in Fencers

The goal of this clinical trial is to learn how three different exercises affect quadriceps muscle activity (Vastus medialis, Vastus lateralis, and Rectus femoris) in young fencers. The three exercises are: a single-leg decline squat, a single-leg decline squat with core activation, and a half high-kneeling exercise based on Dynamic Neuromuscular Stabilization (DNS). The main question it aims to answer is: * Which of these three exercises produces the highest activity in the quadriceps muscles (Vastus medialis, Vastus lateralis, and Rectus femoris)? * Researchers will compare all three exercises to see which one best activates the quadriceps muscles. Participants will: * Perform all three exercises in a random order * Have sensors (surface EMG) placed on the Vastus medialis, Vastus lateralis, and Rectus femoris muscles to record activity * Complete each exercise with standardized timing This information may help guide training and injury prevention programs for fencing athletes by identifying which exercises most effectively activate the quadriceps muscles.