Development of the FITBUDDY Web Application for Fitness Training and Video-Based Workout Streaming

Abstract

This research aimed to (1) develop the FITBUDDY web application, (2) analyze and design the FITBUDDY system, and (3) evaluate user satisfaction with the system for exercising and viewing online training videos. The platform focused on content management, providing users with access to training videos, and supporting exercise planning. The system was developed using Next.js to support SSR/SSG rendering and utilizes MySQL as the primary database. Security was enhanced using JWT for authentication and Bcryptjs for password encryption. Formidable was used for video uploads, and a custom icon set was incorporated into the UI design. System development followed a structured requirements analysis process using a 3-Tier architecture, Entity-Relationship Diagrams, and Use Case Diagrams, covering three user roles: administrator, coach, and general user. The development results indicated that the system functions in accordance with the specified requirements. User satisfaction ratings were as follows: system functional accuracy (4.62±0.48), ease of use (4.48±0.61), user interface aesthetics (4.75±0.45), page loading speed (4.53±0.55), and user data security (4.65±0.50), leading to an overall system satisfaction (4.59±0.52). User satisfaction across all six evaluation aspects reached the "highest" level (4.60±0.52), with particular strength in system accuracy, user interface aesthetics, and data security. Therefore, the system was considered suitable for practical use. Future development will focus on adding video recommendation features, notifications, statistical analysis, and a mobile application version to further enhance system efficiency.