What Personal Trainers Wish GLP-1 Clients Knew

Personal trainers are seeing more GLP-1 clients than ever, and they are learning what works (and what does not) for this unique population. If you are on semaglutide or tirzepatide, here is the fitness advice that matters most.

1. Resistance Training Is Non-Negotiable

This is the number one message from every trainer working with GLP-1 clients. Without resistance training, 25-40% of weight lost is lean mass (muscle). With resistance training, this drops to 15-25%. That difference matters enormously for metabolic rate, functional strength, and long-term weight maintenance.

2. Start with the Basics

You do not need a complicated program. The five foundational movements:

• Squat: Bodyweight, goblet, or machine. Works legs and core
• Hinge: Romanian deadlift, kettlebell swing. Works posterior chain
• Push: Push-ups, chest press, overhead press. Works chest, shoulders, triceps
• Pull: Rows, lat pulldowns, band pull-aparts. Works back and biceps
• Carry: Farmer's walks. Works grip, core, full body

3. Progressive Overload Matters

Doing the same workout forever does not preserve muscle. You need to gradually increase challenge: more weight, more reps, or more sets over time. Track your workouts and aim to do slightly more each week.

4. Cardio Is Good but Not Enough

Walking, swimming, and cycling support cardiovascular health and calorie expenditure, but they do not preserve muscle mass. Think of cardio as complementary to resistance training, not a substitute.

5. Fuel Your Workouts

Do not exercise on an empty stomach if you are already eating minimally on GLP-1. Have a small protein-rich snack before workouts. Post-workout, prioritize a protein-rich meal within 2 hours. Adequate fuel prevents excessive fatigue and supports recovery.

6. Set Realistic Expectations

You will not be setting strength records while in a caloric deficit. The goal during active weight loss is to maintain as much strength and muscle as possible, not to build significant new muscle. Strength building comes later during the maintenance phase.

Frequently Asked Questions