srjmdSRJMDSRJMD2788-9467https://doi.org/10.47310/srjmd.2026.v06i01.004The Effectiveness of Neuromuscular Coordination Exercises in Regulating the Electrical Activity of Shoulder Muscles and Its Reflection on Biomechanical Characteristics and the Level of Shot Put Achievement for JuniorsWaleedKhairullahFayhanIbn Sina University of Medical and Pharmaceutical Sciences, IraqThis research aims to study the effectiveness of neuromuscular coordination exercises in regulating the electrical activity of the shoulder muscles, and the impact of these exercises on the biomechanical characteristics and the level of shot put achievement among juniors. The study sample consisted of 6 youth players under the age of 17, who were regularly participating in training. The training curriculum was implemented for 12 weeks, focusing on instantaneous power and speed-strength exercises specific to the muscles involved in the shot put, with gradual increases in training intensity and regulation of rest periods between training units to ensure effectiveness and player safety. Data was collected using electromyography (EMG) devices to study the main muscles such as the deltoid and triceps muscles, in addition to measuring biomechanical variables related to performance, such as release velocity, instantaneous power of the limbs, push time, and the achievement distance of the implement. The results showed significant differences between the pre- and post-measurements, as the release velocity improved from 11.95±0.60 m/s to 12.80±0.52 m/s, and the instantaneous power of the right pushing foot increased from 1817.12±141.43 N to 2230.0±231.82 N, while the instantaneous power of the left foot at the moment of shot release increased from 1660.8±107.12 N to 2062.7±212.8 N. Furthermore, the instantaneous push time recorded a decrease from 0.353±0.027 seconds to 0.271±0.016 seconds, and the achievement distance of the implement increased from 13.25±0.50 meters to 14.00±0.45 meters, with statistical significance (p<0.05). Additionally, the electromyography results showed a significant increase in the muscles' ability to contract and in muscular coordination, which enhanced the efficiency of neuromuscular coordination during performance and raised the achievement level. These results indicate that neuromuscular coordination exercises specific to instantaneous power and speed-strength clearly contribute to improving biomechanical characteristics and achieving the maximum level of technical performance in the shot put for juniors.