The Activation of Serratus Anterior Muscle During the Plank Exercise

Scapular dyskinesia in athletes will be visually evaluated. It will be considered present if, during 3 out of 5 arm elevation attempts, any of the following are observed: prominence of the medial or upper scapular border, lower scapular angle, excessive clavicular elevation, or rapid downward rotation of the scapula. After the tester demonstrates the required movements, the athletes will practice the movement. The test will begin with the arms at the sides of the body, elbows straight, and shoulders in neutral rotation. Two testers will observe from behind and video record the movements. Participants will be instructed to raise their arms as high as possible simultaneously, using the \'thumbs up\' position, and to maintain this position for 3 seconds before lowering their arms for another 3 seconds. Athletes will perform the arm elevation with a dumbbell weight calculated as 1.4% of their body weight (Kamonseki, Haik, Ribeiro, Almeida, \& Camargo, 2023).