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Movement & Strength

NASM (National Academy of Sports Medicine)

One of the largest certifying bodies for personal trainers in the U.S. It's useful on a GLP-1 because protecting muscle takes qualified strength-training guidance, and NASM offers a course on weight-loss medications (plus a broader Weight Loss Specialization) for trainers who work with clients on these drugs.

By the glp1.how editorial teamReviewed 1 min read

The National Academy of Sports Medicine (NASM) has certified fitness professionals since 1987 and is one of the most widely held personal-training credentials in the United States (NASM (external link)). "NASM-CPT" after a trainer's name means they passed NASM's accredited certification exam in exercise programming and technique. That's a useful signal when you're choosing someone to guide your training.

Why it matters on a GLP-1

Not all the weight you lose on a GLP-1 is fat. Some of it is lean mass, including muscle, and muscle helps hold up your metabolism and keeps you strong and mobile. A 2024 review of these drugs in Diabetes Care proposes tailored resistance training as the way to protect it while you lose weight (DOI (external link)). A qualified trainer helps you get that training right, with sensible exercises and safe progression, especially if strength work is new to you.

NASM is relevant here in two ways. First, an NASM certification lets you check that a personal trainer has met a recognized standard, which the title "personal trainer" alone doesn't tell you.

Second, NASM teaches trainers about weight-loss medications. Its course Understanding Weight Loss Medications covers GLP-1s alongside other weight-loss drugs. It's also included in a broader Weight Loss Specialization that covers other obesity-focused topics, so trainers can learn how to coach clients who are eating far less and need to preserve muscle.

How to use it

Use nasm.org to understand what the credential means and, if you're a fitness professional, to look at the course and specialization above. If you're a patient, treat "NASM-certified" as one useful marker when picking a trainer, and pair that trainer with your medical team (and ideally a registered dietitian) so your strength plan fits the rest of your GLP-1 care.

This is an external organization; glp1.how isn't affiliated with NASM. Certification signals training standards, not medical qualification. Decisions about your treatment stay with your clinician.

nasmpersonal-trainercertificationstrength-trainingmovementresource

Common questions

Questions people often ask about this topic.

  • What does an NASM certification mean?

    It means a personal trainer has passed NASM's accredited certification exam (NASM-CPT) in exercise programming and technique. NASM is one of the largest U.S. credentialing bodies for trainers. It's a useful signal of training standards when choosing a trainer, though it isn't a medical qualification.

  • Does NASM have training about GLP-1 medications?

    Yes. NASM offers a course called 'Understanding Weight Loss Medications,' which covers GLP-1s among other drugs and is included in a broader Weight Loss Specialization covering other obesity-focused topics. There isn't a separate GLP-1-only course.

  • Why does an NASM-certified trainer matter on a GLP-1?

    Losing weight on a GLP-1 also takes some lean mass, including muscle, and well-run resistance training is the main way researchers propose to protect it. An NASM certification helps you check that a trainer meets a recognized standard, which the title alone doesn't tell you.

  • Is a certified trainer a substitute for medical care?

    No. Certification signals training standards, not medical qualification. Pair a qualified trainer with your medical team and ideally a registered dietitian so your strength plan fits the rest of your GLP-1 care.

Evidence

The sources behind this article, labeled by type and strength.

Supporting3

Revision history

Updated 5 times since Jul 15, 2026 · show changes
  1. v6

    Common questions revised

  2. v5

    Body revised

  3. v4

    Evidence sources 1 → 3

  4. v3

    Common questions revised

  5. v2

    Summary rewritten; Body revised

  6. v1

    Change tracking began

Community content

Videos shared by the community. Informational, not endorsements.

Jamie Selzler (NASM-CPT) on why trainers should treat obesity as a complex medical condition, not a choice — and what to ask a prospective trainer about their experience with clients who have obesity.
What clients with obesity say they want from a trainer: knowledge of exercise modifications, no judgment, enjoyable movement, and a focus on safety and injury prevention.
From Jamie Selzler's NASM trainer-education work: what trainers most often miss when working with a weight-loss client.
A clip from the NASM trainer-education program on supporting clients using GLP-1 medications — loose skin, fear of failure, judgment, side effects, and why GLP-1 success still takes habits, nutrition, hydration, and support.

Related guides

  • How to find a personal trainer when you're on a GLP-1 · Once you've decided a trainer is worth it, the next job is picking a good one. This guide covers what credentials mean, why GLP-1 experience matters, where to look, what to ask on a first call, and the red flags that should send you elsewhere.
  • Should you get a personal trainer on a GLP-1? · You don't need a personal trainer on a GLP-1, but getting strength training right matters more than usual, because you're trying to lose fat without losing muscle. This guide covers who benefits most from a trainer, who can skip one, and the cheaper options in between.
  • Joint pain on a GLP-1: why it usually gets better, why it sometimes gets worse first · Losing weight takes real load off your knees, and the trial evidence on that is strong. But plenty of people find their joints ache more in the first months, usually because they've started moving again on deconditioned tissue, or because rapid weight loss took muscle that was helping hold the joint together. This guide covers what the research shows, what it doesn't, and how to train around sore joints.
  • A beginner's resistance-training plan on a GLP-1: sets, reps, and progression · A concrete beginner plan for the strength work you already know you should be doing on a GLP-1: the five core movement patterns, a simple 2–3x/week full-body template, beginner set and rep ranges, how progressive overload and reps-in-reserve work, and when to deload or bring in a trainer.
  • Weight loss vs. body recomposition goals on a GLP-1 · Losing weight and changing your body composition are different goals, and they call for different strategies, even though a GLP-1 medication can help with both. This guide helps you work out which one you're aiming for.
  • Physical Activity Guidelines for Americans · The official U.S. guidance on how much activity, including muscle-strengthening work, adults should aim for each week. The 2nd edition (2018) is still the current version as of September 2026.

Related terms

  • Lean mass · Body weight from everything other than fat: mostly muscle, plus organs and water, and in the broad sense bone. On a DXA report, lean mass usually leaves bone out.
  • GLP-1 · A gut hormone (glucagon-like peptide-1) that stimulates insulin release, slows digestion, and reduces appetite; the target of drugs like semaglutide and liraglutide.
  • Resistance training (progressive overload) · Exercise that loads your muscles against resistance and is made gradually harder over time (progressive overload) to keep or build muscle and strength.

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