How I Used a GLP-1 Medication to Lose Weight Without Losing Sight of What Really Matters
By Mark, Registered Dietitian, Strength & Conditioning Coach, Corrective Exercise Specialist, and Owner of Live Fit Personal Training
If you've been considering a GLP-1 medication like Ozempic®, Wegovy®, Mounjaro®, or Zepbound®, you've probably heard a lot of discussion about the number on the scale.
As a registered dietitian and personal trainer, I'd argue that the scale is only part of the story.
Over the past year, I've used a GLP-1 medication as part of my own weight-loss journey. While I was excited to lose weight, I had one concern from day one:
I didn't want to lose muscle.
That wasn't always easy.
I've had four knee surgeries, deal with arthritis, and have accumulated my fair share of orthopedic issues over the years. Some workouts had to be modified. Some weeks were better than others. But I made one commitment early on:
Even if I couldn't train perfectly, I was going to keep training.
As I've continued following the research on GLP-1 medications, it's been encouraging to see that my experience lines up with what researchers are finding.
The Scale Doesn't Measure Health
One of the biggest misconceptions surrounding GLP-1 medications is that losing more weight automatically means becoming healthier.
Not necessarily.
The scale only tells us how much weight we've lost.
It doesn't tell us what we've lost.
Ideally, we want to lose body fat while preserving muscle.
That's called improving body composition, and from a health standpoint it's often much more meaningful than simply becoming lighter.
Imagine two people each lose 30 pounds.
One loses mostly body fat.
The other loses a significant amount of fat and muscle.
The scale reports the same result.
Their long-term health may not.
Why Muscle Is So Important
Many people associate muscle with athletic performance or appearance.
I think of muscle as one of the foundations of healthy aging.
Maintaining muscle helps us:
Stay strong
Maintain a healthier metabolism
Improve balance and reduce fall risk
Support bone health
Continue golfing, traveling, hiking, and enjoying hobbies
Carry groceries more easily
Play with grandchildren
Maintain independence later in life
That's why preserving muscle matters whether you're 35 or 75.
What Does the Latest Research Say?
Recent studies suggest that GLP-1 medications themselves do not appear to directly damage muscle tissue. However, significant weight loss—regardless of how it's achieved—often includes some loss of lean mass.
The encouraging news is that research consistently points toward several strategies that help preserve muscle during weight loss.
1. Continue Strength Training
Resistance training tells your body that muscle is still needed.
For most adults, two or three strength-training sessions each week provide a powerful stimulus for maintaining muscle.
Your workouts don't need to be perfect.
Mine certainly weren't.
If arthritis, joint replacements, back pain, or previous injuries require modifications, that's okay.
The goal is consistency, not perfection.
2. Prioritize Protein
GLP-1 medications often reduce appetite dramatically.
That's one reason they're effective.
However, eating less food also makes it easier to accidentally eat too little protein.
Protein provides the amino acids your body needs to maintain and repair muscle tissue.
Most people benefit from making protein the centerpiece of each meal while working toward weight-loss goals.
3. Keep Moving
Exercise isn't just about burning calories.
Walking, strength training, golfing, gardening, cycling, recreational sports, and simply moving throughout the day all contribute to better health.
Physical activity supports cardiovascular health, blood sugar control, mobility, and overall quality of life—benefits that extend far beyond weight loss.
What Success Really Looks Like
One thing I often tell clients is this:
Don't chase a smaller number on the scale. Chase a healthier body.
Ask yourself questions like:
Am I getting stronger?
Do I have more energy?
Is my balance improving?
Is my blood pressure better?
Is my blood sugar improving?
Can I do more than I could six months ago?
Those are meaningful markers of progress.
My Biggest Takeaway
If you're taking a GLP-1 medication, don't think of it as replacing healthy habits.
Think of it as giving those habits a better chance to work.
Strength training.
Adequate protein.
Daily movement.
Quality sleep.
Stress management.
Those things still matter.
Maybe more than ever.
Final Thoughts
GLP-1 medications have created exciting new opportunities for many people struggling with obesity and related health conditions.
They're powerful tools—but they're still just tools.
Long-term success comes from combining medical treatment with exercise, good nutrition, and sustainable lifestyle habits.
At Live Fit, our mission isn't simply to help people lose weight.
It's to help them become stronger, healthier, and more capable so they can continue doing the things they love for decades to come.
References
American Heart Association. Physical Activity in Obesity Management: A Scientific Statement. Circulation. 2025.
Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine. 2022.
Wilding JPH, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine. 2021.
American College of Sports Medicine. Position stands and clinical guidance on resistance training and healthy aging.
(This article is intended for educational purposes only and should not replace medical advice. Always discuss medication and exercise recommendations with your physician or other qualified healthcare provider.)
Mark's Practical Take: If you're taking a GLP-1 medication, don't let the scale be your only scorecard. My priorities would be simple: lift weights two or three times a week, make protein a priority, stay active every day, and pay attention to how you're feeling and functioning—not just how much you weigh. Those habits will do far more for your long-term health than chasing the lowest number on the scale.
