<![CDATA[Tennis coaches in Central Java rely on visual observation, making evaluations of forehand biomechanics and ball speed subjective and difficult to document. This community service program aimed to improve the digital competence of 30 coaches through E-TENS, an Android application for video-assisted motion and stroke-speed analysis. The performance-based training comprised needs assessment, tutorials, demonstrations, guided field practice, independent practice, and final evaluation. Initial mapping revealed that 29 coaches (96.67%) had never used digital biomechanics-analysis applications, while one (3.33%) had previous experience. After training, 24 coaches (80%) effectively operated core functions, including selecting or recording videos, uploading data, interpreting basic outputs, and providing technical feedback. Participants suggested improvements involving offline functionality, athlete-history storage, data export, and additional stroke analyses. These findings indicate that E-TENS training can strengthen coaches’ digital literacy and support more objective, accessible, and data-informed tennis coaching. Further evaluation is needed to assess sustained application use and athlete outcomes.]]>
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