At Weight Medics, we help thousands achieve healthier weights using clinically approved medical treatments like Mounjaro (tirzepatide) and Wegovy (semaglutide). While these GLP-1 receptor agonists are revolutionising obesity treatment by reducing appetite and improving metabolic function, there’s one important consideration that often gets overlooked: preserving muscle mass during weight loss.
In this blog, we’ll explain:
- How GLP-1 medications like Mounjaro and Wegovywork
- Why muscle loss is a concern
- The role of weight-bearing and strength training in protecting your lean body mass
What Are Mounjaro and Wegovy?
Mounjaro (tirzepatide) and Wegovy (semaglutide) are prescription medications that help regulate blood sugar and reduce appetite. Originally developed for type 2 diabetes and obesity, these GLP-1 and dual GIP/GLP-1 receptor agonists have shown impressive results in clinical trials, with many patients losing 15–20% of their body weight.
However, rapid weight loss—especially without physical activity—can also lead to a reduction in lean muscle mass, which is something we want to avoid.
Why Muscle Matters in Weight Loss
Muscle does more than just help us stay strong and active. It:
- Boosts metabolism
- Supports joint health
- Helps with balance and mobility
- Is critical for long-term weight maintenance
- When you lose weight quickly, especially through appetite-suppressing medications like GLP-1s, your body may burn both fat and muscle. That’s why combining medication with targeted exercise is essential.
Strength Training: Your Secret Weapon on GLP-1s
To preserve (and even build) muscle while losing fat, we strongly recommend incorporating weight-bearing and resistance training into your routine.
Benefits of strength training while on Mounjaro or Wegovy:
- Boosts energy and mood: Essential for maintaining motivation throughout your weight loss journey.
- Improves metabolic health: Increases insulin sensitivity and supports blood sugar control.
- Protects lean mass: Helps ensure your weight loss comes primarily from fat, not muscle.
- Reduces weight regain risk: More muscle = higher resting metabolism.
What Kind of Training Should You Do?
You don’t need to become a bodybuilder to benefit from strength training. Simple, consistent routines can make a big difference.
Here’s what we suggest:
- 2–3 sessions per week of resistance training
- Include compound movements like squats, lunges, push-ups, and rows
- Use resistance bands, free weights, or bodyweight
- Incorporate weight-bearing exercises like walking or hiking to support bone density
The Bottom Line
GLP-1 medications like Mounjaro and Wegovyare powerful tools for weight loss, but muscle preservation is key to achieving long-term health and sustainable results. By adding strength training to your routine, you’ll not only lose fat more effectively—you’ll feel stronger, more energetic, and more in control of your body.
Start Your Medically Supervised Weight Loss Journey Today
At Weight Medics, we combine expert medical care with personalised support, including access to Mounjaro and Wegovy, tailored nutrition plans, and advice on exercise and muscle preservation.
- Book your free consultation
- Get access to GLP-1 weight loss treatments
- Build a stronger, healthier you
Ready to begin? Contact Weight Medics today and take the first step toward a leaner, healthier body—with the muscle to support it.
Does diet play a role in protecting muscle during weight loss?
Yes. Adequate protein intake is essential for maintaining muscle while losing weight. Combining a protein-rich diet with strength training helps the body repair and maintain muscle tissue during a calorie-reduction diet.
Do GLP-1 medications cause muscle loss?
Weight loss from GLP-1 medications can include a reduction in lean body mass, including muscle. However, this is not direct. Studies suggest that around 20-40% of weight lost may come from lean mass, which is why maintaining muscle during treatment is important.
Why is strength training important while taking Mounjaro or Wegovy?
Strength training helps preserve muscle mass while your body is losing fat. Maintaining muscle is essential for keeping your metabolism healthy, supporting strength, and mobility.
Can you still lose fat if you focus on strength training?
Yes. Strength training helps your body retain muscle while encouraging fat loss. This leads to improved body composition, meaning more fat loss and less muscle loss during your weight-loss journey.
How often should you do strength training while using GLP-1 medications?
Most experts recommend 2-3 sessions of resistance or strength training per week. This can include body-weight exercises, resistance bands, or weightlifting, depending on your fitness level and overall health.
