First Look: Dr. Muscle X New Features & Improvements
Train faster, track smarter, lift anywhere
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Dr. Muscle: The AI Workout App With 27+ Features You Won't Find Anywhere Else
Built by an exercise scientist, updated 50+ times per year—from progressive overload to daily undulating periodization, here's what makes Dr. Muscle the smartest trainer you'll ever have
Smarter. Smoother. Faster. Be The First To Try The New Dr. Muscle
Meet Dr. Muscle X: The Future of AI Personal Training. Early Preview Now Open.
Smart Training. Simplified. Dr. Muscle Coming to Apple Watch.
Power meets simplicity. Innovation meets iron. Right on your wrist.
A Smarter, Better Way To Build Muscle: The Dr. Muscle Manifesto
No hype, no gimmick—just science-backed workouts that grow with you using AI
MacroFactor App Review 2025 by Independent Expert—Results, Price & More [In-Depth]
An honest look at MacroFactor and results from 9 users of the app: is it worth it in 2025?
Latest articles
Update 852: Custom programs and connection error/timer fix (step 1/2)
This new update brings custom programs to Dr. Muscle. Quick background story: A few years ago, I tried training Westside. If you don’t know Westside, it’s a training system for powerlifting where you change your main lift often. You also have strength days (“max effort”) and power days
Swap In Exercises You Feel Like Doing To Build Muscle Faster (2.47% In 9 Weeks)
Researchers from Brazil have found you should build muscle faster (about 2.47% in 9 weeks) if you swap in exercises you feel like doing when you work out (Rauch et al. 2017). Study Highlights In that study, 17 strong males were randomly assigned to 2 groups: * One group had
Exercise Swap
We've added the ability to swap an exercise mid-workout.
How to Build Muscle in Half the Time With The Rest-Pause Technique Inside Dr. Muscle
It seems too good to be true. With the rest-pause technique, you can build muscle just as fast (or faster) with 1 set than you would with 3 normal sets, according to a study published in 2017 by researchers from Brazil (Prestes et al. 2017). Here’s a quick overview
Improved Algorithm
We've improved the algorithm powering Dr. Muscle: * You'll never do more than 5 sets (down from 6) * You'll never do fewer than 5 reps (up from 4) * You'll improve 30-50% when you lift <= 12 kg 30-50% may sound like a lot,
New Charts That Show Your Progress
We've improved the history screen, with charts for any or all exercises, from your last 3 workouts to all time. You can now also scroll through your logs for individual exercises.
14 new workouts!
We've added 14 new workouts to the app. These add new exercises in rotation when you level up your workouts.
Supersets
We've added a superset feature to the app. You can now superset 2 exercises or more.
New! More advanced deloads
New update! With more advanced deloads. The app now understands in more detail what's going on with your training and cut sets 50% and load 90% when you plateau—it will also let you know when its making these changes and link to an article on our blog
Building Muscle With Dr. Muscle's AI: The Science Behind The App (And The Secret To Building Muscle)
How I found the "secret" to building muscle—plus, the science behind the app's autopilot