Exercise
Library
The world's most complete free exercise database. Built from the ground up on WordPress.
737+
Exercises
3,909+
Total posts
6
Free tools
100%
Free forever
One site.
Every tool a fitness person needs.
Exercise Library started as a simple exercise reference and grew into a full fitness platform with calculators, an AI workout builder, a human body atlas and a public API. All free. All built custom on WordPress.
No cookie-cutter theme. No page builder templates. Every feature engineered from scratch to handle serious search traffic and deliver a fast, clean experience from any device, anywhere in the world.
The Challenge
- Build a searchable database of 700+ exercises with muscle data, equipment, categories and video
- Launch 6 fitness calculators with real-time results and no page reload
- Integrate an AI workout generator using the Anthropic API via a Cloudflare Worker
- Ship a full anatomical body atlas with 2,500+ entries across bones, muscles, nerves and more
- Serve all of it globally with sub-second load times via Bunny CDN
737+ Exercises.
Every Detail.
Every exercise has a full description, step-by-step instructions, muscle data (primary, secondary, tertiary), equipment requirements, difficulty level, category tags and an embedded demonstration video. Searchable and filterable in real time using WP Grid Builder.
TDEE / Calorie Calculator
Most popular. Find your daily calorie target.
Macro Calculator
Protein, carbs and fats
Body Fat Estimator
Via measurements
1RM Calculator
One-rep max
BMI Calculator
Body mass index
Protein Calculator
Daily protein needs
Six Tools.
All Free.
Six fitness calculators built with custom PHP shortcodes and vanilla JS for real-time results. Every calculator has its own SEO-optimised page, a full educational explanation section and dedicated hero and content layouts.
AI-Powered.
Goal-Specific.
An AI workout generator powered by Claude Haiku via a Cloudflare Worker proxy. Users input their goal, experience level and available equipment and get a structured, periodised weekly split with sets, reps and rest times. PDF export included.
AI Workout Builder Output
4-Day Hypertrophy Split. Intermediate.
Monday. Push.
Tuesday. Pull.
Human Body Atlas. Biceps Brachii.
Muscles
Bones
Data types
3,172+ Anatomy
Entries.
A comprehensive anatomical reference covering muscles, bones, nerves, ligaments, joints, tendons and bursae. Each entry has a full description, location data, relationships and SEO metadata to all stored in eight JSON data files and managed via a custom WordPress plugin.
The Stack
WordPress
CMS foundation with custom post types for exercises, atlas entries and calculators
Bricks Builder
All front-end templates built in Bricks with ACSS utility system for consistent design
Bunny CDN
Global edge delivery via exercisecdn.com to pages cached at 114+ PoPs worldwide
Meta Box
Custom fields powering exercise data, muscle relationships, equipment tags and atlas entries
Claude Haiku API
AI workout generation proxied through a Cloudflare Worker with rate limiting and structured JSON output
WP Grid Builder
Real-time AJAX filtering for the exercise archive by muscle, equipment, category and difficulty
SlimSEO
SEO meta management with custom integration for exercise and atlas post type schemas
Public API
REST API exposing the exercise database to third-party developers to free tier with rate limits
View API docsWant Something
Like This?
Whether you need a complex database, a custom tool or a full fitness platform, we have built it before. Tell us what you are trying to build.