AG Magazine • Fitness & Performance
What if the most important thing a GLP-1 drug changes isn’t your appetite? In a 2026 randomized trial, Texas A&M researchers gave 64 adults aged 45 to 65 either creatine or a placebo. According to the university’s news release, exercisers on a diet-induced weight-loss program who took creatine gained nearly 3 pounds of lean tissue and cut body-fat percentage more than placebo.
The same week, a PolitiFact fact-check warned that creatine’s real benefits are modest and depend on training. Neither piece tested GLP-1 drugs. Both, though, raise the question every lifter on these medications should ask: when the scale drops, what exactly is leaving?
Strength training and conditioning is how you steer that answer. Curious how much control you really have? This guide covers what these drugs do beyond suppressing appetite, how much muscle you stand to lose, how to train around it, and where creatine honestly fits. We’ll also give you the counterargument, because a smart athlete wants the full picture before changing a routine.
What Do GLP-1 Drugs Do Beyond Suppressing Appetite?
GLP-1 drugs mimic a gut hormone that slows digestion and signals fullness, which is why appetite drops. Their effects may reach further. In a large trial of adults with overweight or obesity and existing heart disease, semaglutide lowered the risk of major cardiovascular events by about 20% compared with placebo.
A Cardiovascular Signal Beyond the Scale
A 2023 Cleveland Clinic news release on the SELECT trial reported that 6.5% of people on semaglutide had a cardiovascular death, heart attack, or stroke, versus 8.0% on placebo, over an average of 40 months. More than 17,000 people took part.
Here’s the fine print. Participants were 45 or older with established cardiovascular disease and no diabetes, and the trial’s investigators noted that primary prevention in people without heart disease was not studied. Treat the heart benefit as promising, not universal.
Why Strength Training and Conditioning Matters More on a GLP-1
The same drugs that shrink appetite also shrink the signal your muscles depend on: fuel, protein, and load. That makes strength training and conditioning a core part of the plan rather than an add-on.
How Much Muscle Do You Lose on a GLP-1?
A November 2025 review of GLP-1 muscle loss found that roughly 25% to 30% of total weight lost on these drugs is lean tissue, with skeletal muscle making up about half of that. The authors stress this proportion resembles other weight-loss methods, so the drugs are not uniquely destructive. Still, GLP-1 muscle loss is a real risk worth managing, especially if you compete, lift, or simply want to stay strong into your later decades.
Why does it happen? The review points to lower protein intake as appetite fades, a sustained energy deficit, and hormonal changes that blunt muscle repair. You can influence several of those factors yourself.
What Does a Smart Training Week Look Like?
Strength training and conditioning works best when it is repeatable, not heroic. Two or three strength sessions a week, each built around four to six compound movements, is a workable starting point for most healthy adults. Add one or two conditioning days at an easy-to-moderate effort, such as brisk walking, cycling, or swimming.
Keep sessions focused. When appetite and energy dip on a GLP-1, 40 minutes of quality work beats an ambitious hour you skip. Leave a rep or two in reserve, eat protein within a few hours of training, and scale back if dizziness, unusual fatigue, or nausea shows up. Tell your clinician if it does.
Can You Build Strength While Taking Semaglutide?
Nobody can promise that yet. Researchers have openly asked whether resistance exercise can optimize body-composition changes on incretin-based drugs, and a published trial protocol called LEAN-PREP will test resistance exercise plus protein during semaglutide and tirzepatide treatment.
Until those results arrive, the 2025 review’s guidance is a sensible foundation for lean mass preservation:
- Protein intake: aim for 1.2 to 1.6 grams per kilogram of body weight daily, spread across meals.
- Resistance training: train the big patterns (squat or leg press, hinge, push, pull) with progressive overload.
- Conditioning: add moderate aerobic work for heart health and recovery.
- Monitoring: track body composition, not just scale weight, with a clinician’s guidance.
Where Does Creatine Monohydrate Fit In?
Creatine is one of the most studied supplements in sport, which is exactly why it keeps showing up in conversations about preserving muscle. The honest answer is that it helps at the margins, and only alongside strength training and conditioning.
Does Creatine Help Preserve Muscle During Weight Loss?
In the Texas A&M trial, exercisers on a weight-loss program who took 10 grams of creatine monohydrate daily gained nearly 3 pounds of lean tissue while losing fat, and reduced body-fat percentage more than placebo. Participants were healthy adults, not people on GLP-1 medication, so the result is suggestive rather than proof for this group.
The broader foundation is older but solid. A 2017 International Society of Sports Nutrition position stand concluded that creatine monohydrate is among the most effective supplements for high-intensity performance and lean mass, and safe for healthy people at recommended doses. Because it is more than five years old, treat it as foundational rather than current.
What Does the Fact-Check Say About the Hype?
PolitiFact’s review separated what holds up from what doesn’t. Modest gains in muscle and strength with resistance training are supported, while claims of dramatic muscle “without working out” are overstated. One physician it quoted, Dr. Vijay Jotwani of Houston Methodist, said the benefits come from gym performance rather than the supplement alone. [SOURCE NOT ON ALLOWLIST — editor review]
That’s the reframe worth keeping. Creatine can add a small edge, but the lifting is the engine.
The Other Side of the Ledger
A balanced view needs the counterargument. GLP-1 drugs carry real tradeoffs: in SELECT, 16.6% of people on semaglutide stopped treatment because of side effects such as nausea and diarrhea, according to the same Cleveland Clinic news release. The 2025 review itself notes that dieting by other means causes a similar share of lean-tissue loss, so the alarm should be proportionate.
Creatine has limits too, and it never replaces strength training and conditioning. Its evidence comes mostly from healthy adults, and no trial we found has tested it in people taking GLP-1 drugs. The evidence strength is moderate for healthy lifters and preliminary for this specific pairing. Talk with your clinician before adding creatine, changing your protein intake, or starting a new training program, especially if you have kidney disease or other medical conditions.
⚡ PRO TIP
Track your strength, not just your weight. Pick three lifts, such as a leg press, a row, and a press, and log the load and reps every two weeks. If those numbers hold or climb while the scale falls, that’s a free, practical sign your strength training and conditioning is protecting muscle. Bring the log to your clinician alongside any body-composition scan.
Train the Muscle. Keep the Win.
The scale tells you how much you lost. Strength training and conditioning decides what you keep. Whether you’re a competitive athlete or a health-conscious lifter, the people who treat these medications as a tool, and training as the strategy, are the ones who come out stronger. Lean mass preservation is not about perfection. It is about showing up twice a week, every week.
This week, schedule two full-body strength sessions, record three baseline lifts, and take those numbers to your next clinician visit. That single page of data is where strength training and conditioning becomes a plan instead of a hope.
