Workouts Built Around You,Written by AI
Muscles AI writes strength, HIIT and conditioning workouts around your fitness level, goals and equipment, so each session fits what you have and where you are.
Our Mission
Muscles AI uses an AI language model to write workouts from the details you give it: your fitness level, goals, equipment, schedule and any injuries or limitations. The workouts are written by the AI; no human trainer writes or reviews them.
Whether you're a complete beginner or a seasoned athlete, our platform meets you where you are and guides you to where you want to be, making fitness achievable, enjoyable, and sustainable for everyone.
What Drives Us
Our core values shape every decision we make and every feature we build
Personalisation First
Every workout is tailored to your unique goals, fitness level, and available equipment. No one-size-fits-all solutions.
AI-Written Workouts
Workouts are written by an AI language model using common strength and interval formats such as sets and reps, AMRAP, EMOM and rounds for time.
Safety & Injury Prevention
Each exercise comes with scaling options, workouts take the limitations you list into account, and Premium includes an injury risk self-assessment.
Continuous Growth
We keep improving Muscles based on feedback from the people who use it.
Accessible to All
There is a free plan, and Muscles runs in any modern web browser.
How It Works
An AI Language Model
Your profile and request are sent to an AI language model, which writes the workout in a structured format the app can show, save and track.
Your Profile
The fitness level, goals, equipment, schedule and limitations you give during onboarding shape every workout. Update your profile and new workouts follow it.
Your Own Logs
The workouts, lifts, meals and recovery check-ins you log are shown back to you as charts and scores, built from what you enter.