An estimated 1 in 8 adults in the US now use a GLP-1 medication like Ozempic, Wegovy, or Zepbound, and a meaningful share of the weight they lose is muscle, not fat.
This is not a health scare story. It’s a growth opportunity for gyms, studios, and trainers.
“Because users lose nearly as much muscle as fat, strength training becomes more important than ever, and gyms are uniquely positioned to capitalize on both restorative and preventive demand.”
— Martin Seibold, CEO, LifeFit Group (200+ clubs including Fitness First, Barry’s Bootcamp, Club Pilates across Germany)
This blog is for:
- Personal trainers programming for GLP-1 clients
- Gym owners and studio managers evaluating this as a growth opportunity
- Health club managers who need to speak on this topic with members
- Instructors working with clients on weight-management medications
This blog covers:
- Does Using GLP-1 Medications Cause Muscle Loss in Adults?
- Can a Personal Trainer Help Reduce Muscle Loss for Patients on GLP-1 Medications?
- Which Fitness Services Appeal Most to GLP-1 Medication Users?
- What Fitness Equipment Is Recommended for GLP-1 Users in Gyms?
- How to Educate Gym Staff About GLP-1 Medications to Better Serve Those Users?
- What Onboarding Strategies Do Fitness Centers Use to Support Clients on GLP-1 Treatments?
We also draw on real examples from gyms, clubs, and trainers already doing this, like SURFCORE Fitness, Equinox, LA Athletic Club, Chris Ryan Fitness, and River Crossing YMCA.
Does Using GLP-1 Medications Cause Muscle Loss in Adults?
Yes. Research shows a meaningful share of the weight lost on GLP-1 medications is lean muscle mass, not fat. The exact percentage varies by study, but multiple sources place it between 10% and 40% of total weight lost.
What GLP-1 Medications Do
GLP-1 receptor agonists (Ozempic, Wegovy, Zepbound, Mounjaro) mimic a natural gut hormone that regulates blood sugar and appetite. They slow gastric emptying and increase satiety, which reduces calorie intake and drives weight loss.
Why Rapid Weight Loss Leads to Muscle Loss
- In the STEP 1 trial for semaglutide, participants lost an average of 15% of body weight, and close to 39% of that was lean muscle mass. (Harvard Science Review, Feb 2026)
- A 2026 clinical review found patients losing more than 15% of body weight on high-dose GLP-1s saw an average lean mass decline of 10-15%. (Ubie Doctor’s Note, 2026)
- Rapid weight loss, regardless of method, takes muscle along with fat. GLP-1s accelerate this process because they accelerate weight loss itself.
Fitness educators and podcasters have flagged a related gap: most GLP-1 users start the medication with no gym plan in place, and many don’t realize up to 40% of weight lost can be muscle without structured resistance training. This is both a knowledge gap and a coaching opportunity for gyms.
Why Preserving Muscle Matters Long-Term
- Muscle loss lowers resting metabolic rate, making it harder to keep weight off after stopping the medication.
- Unmanaged muscle loss raises frailty and fall risk, particularly in older adults.
“Rapid GLP-1-driven weight loss without structured physical activity strips muscle and bone, increasing frailty and hospitalizations.”
— Ken Griffin, CEO, AUSactive (Australia’s peak body for the exercise and active health sector)
Griffin has called for a National Physical Activity Strategy in Australia to ensure exercise is routinely prescribed alongside GLP-1 medications, positioning fitness professionals on par with GPs and pharmacists in patient care.
Can a Personal Trainer Help Reduce Muscle Loss for Patients on GLP-1 Medications?
Yes. Structured resistance training combined with trainer oversight is the most effective way to preserve muscle mass for people on GLP-1 medications.
The Role of Resistance Training in Preserving Muscle
- Resistance training signals the body to retain and build muscle even in a calorie deficit, offsetting the muscle loss that comes from rapid, medication-driven weight loss.
- Research shows resistance training paired with adequate protein intake can largely offset muscle loss during GLP-1-driven weight loss. (Medscape, May 2026)
- Without it, weight loss on GLP-1s comes disproportionately from muscle rather than fat.
Why Coaching and Programming Matter
A trainer does more than assign exercises. For GLP-1 clients specifically, a trainer:
- Tracks strength progress, not just scale weight, giving clients a different marker of success as the number on the scale drops
- Adjusts training intensity and recovery time, since muscle repair is slower on these medications
- Monitors protein intake through regular check-ins, since appetite suppression is the main driver of muscle loss
Life Time’s Chief Science Officer Jim LaValle has called insufficient protein intake, worsened by suppressed appetite, a critical and underappreciated risk for GLP-1 users trying to preserve muscle long-term. This is exactly the gap a trainer’s check-ins are meant to close.
- Catches early warning signs of excessive muscle loss before they become a medical issue
Programming isn’t the only barrier, though. Gym intimidation, fear of the weight room, never having lifted before, not knowing where to start, is as significant a barrier to strength training as physical side effects like nausea and fatigue for many GLP-1 users. Reducing that intimidation is as much a trainer’s job as writing the program itself.
Gyms as Part of a Member’s Long-Term Health Journey
“The emergence of effective obesity medications marks a pivotal moment in global health, but it also presents a critical choice. We can treat obesity as a short-term clinical intervention, or we can build systems that deliver lasting health outcomes. Physical activity and nutrition are not optional add-ons; they are foundational to safety, effectiveness, and long-term success. This is an opportunity to properly position our sector as an essential partner in prevention and care while ensuring individuals retain the freedom to engage in physical activity in the environments where they feel most comfortable.”
— Liz Clark, outgoing President and CEO, Health & Fitness Association (HFA)
Clark has called on healthcare systems to treat GLP-1 care as more than a short-term clinical intervention, warning that costs and outcomes worsen without structured exercise support. She has co-led a multinational coalition calling for strength training to be formally recognized as a core component of obesity treatment, not an optional add-on.
For gyms, this reframes a GLP-1 client from a short-term weight-loss customer into a long-term health member.
Which Fitness Services Appeal Most to GLP-1 Medication Users?
The top three: personal training and strength-focused group classes, body composition tracking, and recovery or habit-coaching services.
Personal Training and Strength-Focused Group Classes
Muscle loss is now the top fear among GLP-1 clients walking into gyms. A NASM survey found 60% of trainers report this as the most common concern their GLP-1 clients raise.
This is driving demand for structured, progressive strength programming, not generic group fitness classes. Brands like Life Time (Miora), Equinox, and Carbon Performance have all built dedicated personal training tracks in response.
Body Composition Tracking and Progress Assessments
GLP-1 clients need a different progress metric than the scale, since the scale doesn’t distinguish between fat loss and muscle loss.
- Anytime Fitness has rolled out Evolt body composition scanners across nearly every U.S. location, giving members and trainers a way to track lean mass, not just total weight. (Anytime Fitness, Feb 2026)
- Regular body composition scans let trainers catch disproportionate muscle loss early and adjust programming before it becomes a bigger issue.
Recovery, Mobility, and Habit Coaching Services
Consistency matters more than intensity for this population, since energy levels shift as appetite and calorie intake drop.
- Carbon Performance, a multi-location fitness facility, pairs strength training with recovery lounges offering cold plunge and infrared sauna access, specifically to help members recover well enough to keep training consistently. (Carbon Performance, 2026)
- Habit coaching, built around showing up consistently rather than training harder, is becoming a standard part of GLP-1 programming across multiple brands.
What Fitness Equipment Is Recommended for GLP-1 Users in Gyms?
The short answer: beginner-friendly machines, functional trainers, and free weights that allow progressive overload, since most GLP-1 clients are new to strength training.
Beginner-Friendly Strength Machines and Free Weights
Fixed-path machines like leg press, chest press, and lat pulldown are the safest starting point, since they teach movement patterns without requiring balance or stabilization. Free weights come in once basic form is established.
Functional Training Equipment for Progressive Overload
Cable-based functional trainers are one of the best equipment investments for GLP-1 users, offering constant resistance through a full range of motion with load that increases gradually as strength improves. They’re also joint-friendly, letting clients move naturally instead of on a fixed path.
Equipment That Supports Safe, Sustainable Muscle Building
Smith machines offer a guided, stable alternative to barbell training for newer lifters. Resistance bands are a low-cost, lower-injury option with strength gains comparable to free weights. Gyms are already shifting floor space toward strength equipment and away from traditional cardio, a trend accelerated by both Gen Z demand and rising GLP-1 adoption.
How to Educate Gym Staff About GLP-1 Medications to Better Serve Those Users?
Train staff on GLP-1 basics and side effects, teach safe coaching adjustments, and clearly define where fitness guidance ends and medical advice begins.
Train Staff on GLP-1 Basics and Common Side Effects
A 2026 industry report tracking 17 fitness clubs found nearly every GLP-1 program relies on trainers, but the industry still lacks standardized education for coaches in this population.
Staff should understand the basics:
- How GLP-1s suppress appetite,
- Why rapid weight loss risks muscle loss, and
- About common side effects like nausea, fatigue, GI distress, and dehydration, so they know when to modify a session.
Best Practices for Coaching GLP-1 Members Safely
LA Athletic Club partnered with the CHEK Institute to run dedicated workshops training coaches specifically on GLP-1 side effects, including avoiding quick position changes that can trigger dizziness and keeping session intensity moderate rather than pushing hard.
Defining the Boundary Between Fitness Guidance and Medical Advice
Staff need clear scope-of-practice training: know when to guide a client and when to refer them to their doctor or a registered dietitian. This protects both member safety and gym liability.
What Onboarding Strategies Do Fitness Centers Use to Support Clients on GLP-1 Treatments?
The short answer: a structured intake assessment, a personalized strength plan with clear goals, and a regular check-in rhythm, built into onboarding from day one rather than added later.
Initial Health and Fitness Assessments
Gyms should run every new GLP-1 client through a proper intake before programming starts, not just a standard membership sign-up. This means:
- A consultation covering medication, dosage, side effects, injury history, and goals
- A movement screening to check range of motion and identify limitations early
- A body composition scan (InBody, Evolt, or similar) to establish a lean-mass baseline, since body weight alone won’t show what’s fat and what’s muscle
This isn’t just good practice, it’s measurable. Personal trainers who use a structured onboarding process see 28% higher client retention and 35% higher client satisfaction than those without one.
Personalized Strength Training Plans and Goal Setting
Vague goals don’t hold up for this population. Gyms should set SMART goals (specific, measurable, achievable, relevant, time-bound) with every GLP-1 client in the first session, since concrete targets build the self-trust needed for long-term behavior change.
From there, programming should be built around the client’s current medication stage and energy levels, not a generic template, and should be revisited as their dose, appetite, or side effects change over time.
Regular Progress Reviews and Ongoing Communication
Onboarding shouldn’t stop after week one. Gyms should build in:
- A weekly or biweekly check-in rhythm, since consistent accountability is what separates short-term results from long-term ones
- Periodic body composition re-scans to catch disproportionate muscle loss early and adjust the plan before it becomes a bigger issue
- Progress tracked through strength and body composition, not just body weight, since the scale alone can’t show whether a client is losing fat or muscle
Real Gyms Already Getting This Right
Six real-world examples, covering every business type this blog is written for: boutique studios, premium chains, multi-service clubs, independent trainers, and community gyms.
This isn’t a US-only trend. In the UK, outgoing ukactive CEO Huw Edwards has argued that the global rise of obesity medications increases, rather than reduces, the need for physical activity, and has called for gyms and fitness professionals to be formally embedded into GLP-1 care pathways.
Exercise New Zealand CEO Richard Beddie has made a similar case on economic grounds, warning that GLP-1 therapies will drive higher long-term health system costs if not paired with structured exercise support, and calling this a critical opportunity for the fitness industry to build itself into obesity care rather than sit outside it.
SURFCORE Fitness (Boutique Studio)
SURFCORE Fitness, a boutique HIIT studio in Mid-City LA, has built its brand identity around GLP-1 training. Owner Carlos Sosa promotes dedicated GLP-1/Ozempic workouts directly on Instagram and stays in contact with clients’ prescribing doctors before designing their programs, a level of coordination that’s helped the studio earn recognition as LA’s Best HIIT Studio. It’s proof that a small, independent gym can own this niche locally with a clear specialty and consistent content, without needing national-brand resources.
Equinox (Premium Chain)
Equinox introduced a formal “GLP-1 protocol” in January 2024 and has since scaled it to 80 clubs internationally.
The protocol structures training intensity, frequency, and volume around each client’s medication stage, paired with ongoing nutrition guidance from day one.
It shows this model isn’t limited to a single boutique location, it can be built as a branded, repeatable protocol that scales across an entire international chain.
LA Athletic Club (Multi-Service Club)
LA Athletic Club took a more clinical, safety-first approach, partnering with the CHEK Institute to train its coaches specifically on GLP-1 side effects. Trainers there avoid quick position changes that can trigger dizziness and keep sessions moderately intense rather than pushing hard, managing GI side effects like nausea. This model is especially useful for clubs serving an older or more medically cautious membership base. (Source: Los Angeles Times/TNS, March 2025)
Chris Ryan Fitness (Independent Trainer)
Trainer and fitness influencer Chris Ryan launched a GLP-1-specific workout series on his own fitness app, with both live and on-demand routines, and now runs a dedicated 90-day GLP-1 Training Program as a standalone subscription product. It’s proof that a single trainer, without a physical gym, can build an entire revenue line around this audience through content and a simple app.
River Crossing YMCA (Community Gym)
River Crossing YMCA runs a tiered support program for GLP-1 members that includes routine InBody body composition scans, personalized nutrition coaching, and structured strength training, layered on top of its regular group fitness offerings. It shows this approach works at the community level too, not just at premium clubs or boutique studios.
Final Thoughts
GLP-1 medications aren’t going away, and neither is the muscle loss that comes with them. The gyms, studios, and trainers already building strength programs around this, from a single boutique studio to an 80-club international chain, aren’t reacting to a trend. They’re building the next decade of their business.
The takeaway is simple – every GLP-1 client walking into your gym needs the same thing, a structured strength program, protein guidance, and a coach who understands what their body is going through. Whether you run a boutique studio, a multi-service club, or a solo training practice, there’s already a version of this working at scale.
The businesses that treat GLP-1 clients as a long-term coaching relationship, not a one-time sign-up, are the ones that will own this decade’s biggest membership wave.
