en فيزيولوژی ورزشی و شاخه‌های وابسته بدان Sport Physiology and its related branches مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background. </strong>Electrical Muscle Stimulation (EMS) has gained recognition for enhancing neuromuscular performance in elite athletes, yet its application among novice swimmers remains underexplored. Novices often face unique challenges such as poor motor coordination, muscular imbalance, and inconsistent performance&mdash;gaps that conventional training alone may not effectively address.<br> <strong>Objectives. </strong>This study aimed to evaluate the effectiveness of EMS, explicitly using the EMS Butterfly device, in enhancing swimming speed and improving performance consistency in novice swimmers.<br> <strong>Methods. </strong>Twenty-one swimmers, aged 15&ndash;18 years, were randomly assigned to an EMS group (n = 14) and a control group (n = 7). Over the course of four weeks, the EMS group underwent biweekly EMS sessions targeting the lower limb muscles, combined with regular swim training. Pre- and post-intervention assessments included 50-meter freestyle swim time and performance variability, as measured by the Coefficient of Variation (CV).&nbsp;<br> <strong>Results. </strong>EMS significantly improved swim performance (mean time reduction of 16.5s vs. 2.4s in controls; p<0.001) and reduced intra-individual variability (lower CV). A strong time &times; group interaction effect was observed (p<0.001, &eta;&sup2;ₚ = 0.704). These outcomes suggest enhanced neuromuscular coordination, strength, and performance stability in the EMS group.<br> <strong>Conclusion.</strong> EMS is a practical, low-impact intervention that supports physical and psychological readiness in novice swimmers. It offers a scalable solution to accelerate foundational development while minimizing the risk of injury. Future studies should explore its long-term efficacy, biomechanical integration, and application in individualized training protocols</div> Beginner Athletes, Electrical Muscle Stimulation (EMS), Neuromuscular Training, Performance Consistency, Swimming Performance 0 0 http://aassjournal.com/browse.php?a_code=A-11-2388-2&slc_lang=en&sid=1 Boyke Mulyana boyke.mulyana@upi.edu 100319475328460017266 100319475328460017266 No Sport Coaching Education Study Program, Faculty of Sport and Health Education, Universitas Pendidikan Indonesia, Bandung, Indonesia Afianti Sulastri afiantisulastri@upi.edu 100319475328460017267 100319475328460017267 Yes Nursing Study Program, Faculty of Sport and Health Education, Universitas Pendidikan Indonesia, Bandung, Indonesia