How to Build a Fitness and Workout Tracking Platform with Next.js 16 and Strapi 5

This tutorial provides a comprehensive guide for building a self-hosted fitness and workout tracking platform using Next.js 16 and Strapi 5, focusing on maintaining user control over their workout data and avoiding subscription fees. The platform is built with two main components: a public exercise library with demonstration images and form guides, and an authenticated workout tracker for users to log their exercises and visualize their progress with Recharts line charts. Strapi 5 is utilized for content management, handling media, and providing custom services for workout statistics, while Next.js 16 leverages server-side rendering for search visibility and server actions for logging workouts. The tutorial covers setting up a Strapi backend to model exercises, workout sessions, sets, and personal records with related content types, and includes a custom service for calculating workout volume, personal records, and streaks. The frontend is developed with Next.js 16, emphasizing a clear separation between server and client components, ensuring that API tokens remain secure and only necessary data is exposed to the client. The tutorial concludes with suggestions for further development, such as deploying to cloud platforms and adding new features like workout templates and social functionalities.

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