The Effect of Triceps Brachii Fatigue Due to Isometric Contraction on Elbow, Velocity and Accuracy of Overhead Smash in Badminton

Abstract

Introduction: In order to execute the overhead assault with the front racket in badminton, the triceps brachii muscle must stretch the elbow joint. Even though this muscle is crucial for accomplishing this talent, it's crucial to investigate how localised triceps brachii exhaustion affects the ability to execute the overhead shot with the front racket. Therefore, the central continuous contraction was chosen to cause local fatigue in the triceps brachii muscle. Accordingly, the purpose of this study is to ascertain how the central isometric contraction, which causes triceps brachii muscle exhaustion, affects the elbow movement, velocity, and accuracy of the shuttlecock when performing the forehand overhead jump smash skill. Method: The study sample consists of 12 international badminton players who have participated in the World Championships and Olympic Games and use the right hand as a favorite according to the following averages (age 25.3 ± 1.2 years, mass 70.20 ± 2.31 kg, height 1.81 ± 0.11 m, training age 7.9 ± 2.1 years, Medicine ball throw test (1) kg overhead 2.96 ± 2.31 kg, distance 1.81 ±0.11 m). They were asked to perform a crushing throw accuracy test, and then they were subjected to a maximal voluntary isometric contraction test. After that, they were asked to repeat the crushing throw accuracy test. The two tests of shooting the crushing throw, before and after, were filmed for the purposes of kinetic analysis through the Kinovea 0.9.5 program. The Automatic Shuttlecock Launcher and the Stalker Sport 2 Radar devices were used. Results: After using statistical means such as statistical averages, standard deviations, and the Wilkeson test, the results showed a negative effect with statistical significance at the level (α < 0.05) of the triceps brachii muscle fatigue caused by the isometric contraction on the movement of the elbow, the velocity and accuracy of the crushing blow against the front racket overhead among the badminton players. Conclusion: According to the results of the study, it was recommended that the muscle strength of the triceps brachii should be raised to increase its tolerance to local fatigue resulting from its continuous use among badminton players.