The scale is dropping. Your sleeves are getting baggier. That's not a win.
GLP-1s are good at making you eat less. They are not good at telling your body what to keep.
When the calories fall, the body sells whatever is expensive to maintain. Muscle is expensive. Fat is not. So if you don't give it a reason to keep the muscle, it won't.
The reason is two things, done on a schedule:
Protein at a number, not a vibe. Most people on a GLP-1 think they're "eating enough protein" because they had chicken once. You're not. You need a daily target in grams, written down, hit most days. If the shot kills your appetite, you still hit the number — smaller meals, same total.
Lift something heavy, twice a week minimum. Not a 90-minute program. Not a new identity as a gym person. Two sessions that cover the big patterns: squat, hinge, push, pull. Write the weights. Next time, add a little.
That's the whole system. Not a course. Not a mindset. A 14-day plan with the trackers already filled in as blanks.
If you want the paperwork done for you, that's what Keep the Muscle is.