One metric that matters
Scale weight hides the difference between muscle and fat. We built M3 around your Fat-Free Mass Index so progress means something real.
Our approach
Muscle is medicine
M3 exists because of one idea: skeletal muscle is the body's largest metabolically active organ, not a cosmetic afterthought. Building and keeping it is one of the most effective things a person can do for long-term health — and almost nobody trains that way.
Who M3 is for
People with pain or posture problems and older adults, at home with a phone propped up, as well as beginners, advanced lifters and athletes. The goal stays muscle mass; for you the same program adapts through a safety check, a camera assessment and a daily check-in.
What we believe
One program for everyone
Beginners, advanced lifters, athletes, people with pain or posture problems and older adults follow the same program: it is sized to where you are today, you can add the rest as you get stronger, and it changes as our research does.
Every session, laid out for you
Each session lists the sets, reps, effort and rest, so your time in the gym goes into training, not planning.
Your data is yours
Export everything or delete your account in one click, any time — no support ticket required.
M3 is not a medical service and does not diagnose. If you have pain that is new, severe or getting worse, see a doctor or physiotherapist.
Start your program
Create a free account and start the program that adapts to you.