Pro Playbook: How to Coach a GLP-1 Client in 2026

GLP-1 medications — Ozempic, Wegovy, Mounjaro — have reshaped the personal training landscape faster than any other trend of the past decade. More than 40 million people globally are on a GLP-1 prescription in 2026. And a large share of them need a coach, not a physician.

Every Monday, the Pro Playbook gives you the actionable framework to grow your coaching business. This week: the practical guide to coaching a GLP-1 client.

Key takeaways

GLP-1s cause significant muscle mass loss without the right training — your job is to preserve that muscle
Core protocol: resistance training 3-4x/week, protein at 1.8-2.4g/kg/day, light cardio only
GLP-1 clients often have heightened fatigue and reduced appetite — adjust intensity accordingly
40M+ people globally are on GLP-1 medications in 2026 — this is a massive and underserved coaching niche

Understanding the physiological impact of GLP-1s

GLP-1 receptor agonists work across several mechanisms: they slow gastric emptying, increase satiety, lower blood glucose, and drive often significant weight loss (10-20% of body weight over 12-18 months for the latest generation molecules).

The issue: this weight loss isn't selective. Studies show that without proper resistance training, 25-40% of the weight lost can come from muscle mass — not just fat. That's where you come in.

Your role is no longer about "burning calories" or "accelerating weight loss." Your role is preserving and building muscle while the medication handles the caloric balance. That's a fundamental mission shift.

The adapted training protocol

Here's the core framework for a GLP-1 client in generally good health, medically cleared for exercise:

Resistance: 3-4 sessions per week

Prioritize compound movements: squats, deadlifts, bench press, pull-ups, rows
Intensity: RPE 6-7 (not RPE 9-10 — reduced caloric intake limits recovery capacity)
Volume: 10-15 sets per muscle group per week — moderate but consistent
Progression: increase load once 3 sets are completed with 2+ reps in reserve

Cardio: light to moderate only

30-45 minutes of brisk walking, cycling, or swimming at moderate intensity, 2-3x/week
Avoid high-intensity intervals in the first 4 months — the caloric deficit is already significant
Cardio supports cardiovascular health without compromising muscle recovery

Nutrition: what you need to know to advise well

You're not a nutritionist. But you need to understand the essentials to orient your clients and collaborate intelligently with their prescribing physician.

The critical point: GLP-1 clients eat significantly less. The temptation is to drop below 1,200-1,400 kcal/day. At those levels, hitting adequate protein becomes very difficult — and muscle loss accelerates.

The baseline to communicate: 1.8 to 2.4g of protein per kg of body weight per day. That's higher than standard recommendations, but it's the level needed to preserve muscle mass in a deep caloric deficit. If your client is eating 1,300 kcal/day and weighs 80kg, that's 144-192g protein. Ambitious — protein supplements become nearly essential.

Red flags to know before every session

Before each session, validate these 3 points with your client:

Hydration: GLP-1s can cause nausea and insufficient fluid intake — confirm your client has had enough to drink
Recent food intake: appetite is dramatically reduced in the first months — a client who hasn't eaten in 6 hours shouldn't be doing a heavy session
Side effects today: nausea, fatigue, dizziness — adjust session intensity immediately

If your client shows signs of malnutrition, persistent weakness, or significant side effects, recommend they contact their prescriber before the next session.

The business opportunity most coaches are missing

Most coaches treat GLP-1 clients like standard weight-loss clients. That's a mistake. These clients have different physiological needs, results that need explaining differently (the scale might drop slowly if muscle is being built as fat is lost — that's a win, not a program failure), and a need for more frequent check-ins.

Coaches who build recognized GLP-1 coaching expertise can:

Create a specific premium-priced program (GLP-1 coaching requires more check-ins, justifying higher rates)
Develop referral partnerships with prescribing physicians and clinics in your area
Position their profile and content around this topic to attract these clients organically

The GLP-1 client market is massive, underserved, and growing fast. Now is the time to position for it.