If you’re taking a GLP-1 medication and not doing resistance training, you’re heading toward a serious problem. Without it, 20–40% of the weight you lose can come from muscle, not fat. When muscle goes, metabolism slows — leaving you in a worse place than when you started on the GLP-1 in the first place.
This isn’t about marathon training or bodybuilding. It’s about keeping your strength, protecting your metabolism, and maintaining real health. You can start small — what matters is that you start.
Resistance Training Comes First
Protein alone won’t save your muscle. Think of your body like a house:
- Protein is the building materials (bricks and lumber).
- Resistance training is the construction crew.
If you have building materials but no crew, nothing gets built. In fact, excess protein can even convert to fat in the liver. But if you have a solid crew and fewer materials, the house stays strong.
Resistance training tells your body, “Keep this house solid.” It’s non-negotiable. Protein supports the process — but the training drives it.
What To Do
- Start resistance training 2x/week.
- Use bodyweight, bands, or light dumbbells.
- Focus on large muscle groups (legs, chest, back, shoulders).
- 5-10 minutes is enough to begin. You can eventually reach 20-30 minutes
- Eat protein with purpose.
- Aim for 1.0 – 1.2 gms per kg of body weight daily. A 200 pound person should strive for 90-110 grams of protein daily
- Spread it throughout the day.
- Use shakes or smoothies if appetite is low on GLP-1s.
- Track strength, not just weight.
- Can you lift more, move better, or recover faster? That’s the goal.
Why Starting Small Works
Even two short strength sessions a week can protect muscle and metabolism. It’s about sending the signal that your muscles are needed. Small, consistent effort beats doing nothing.
The Bottom Line
Skip resistance training, and you could lose up to 40% of your weight loss as muscle. Eat protein without training, and some of it turns to fat instead of strength.
Resistance training is your construction crew. Protein is your materials. Together they build — and protect — the body you want to keep.
Want Help?
Grab my free GLP-1 Guide or set up a free consult to talk about your specific plan. Let’s make sure you keep the muscle you need for long-term success.
Mike Thomas is a registered pharmacist and a Mayo Clinic–trained, board-certified health coach who specializes in helping people on GLP-1 medications protect their health, preserve muscle, and build sustainable habits for lasting results—during and after treatment.
This blog is for educational and informational purposes only and solely as a self-help tool for your own use. I am not providing medical, psychological, or nutrition therapy advice. You should not use this information to diagnose or treat any health problems or illnesses without consulting your own medical practitioner. Always seek the advice of your own medical practitioner and/or mental health provider about your specific health situation. For my full Disclaimer, please go to CoachMikeThomas.com.