The glaring problem with glp-1s: what every coach and trainer needs to know
GLP‑1 medications like Ozempic, Wegovy, and Mounjaro are powerful tools for weight loss, but the story patients are hearing is often incomplete. Major trials show that a significant portion of the weight lost on these drugs is not just fat, but lean mass—which includes muscle, bone, and other fat‑free tissue—especially when people are not doing resistance training or eating enough protein! This is crucial to know.
The drug company's own studies have compared the magnitude of muscle loss over about 68 weeks to what we would normally expect across roughly 20 years of aging. That is SIGNIFICANT, especially when we start thinking about strength, mobility, and long‑term independence.
Emerging data also suggest higher rates of low bone density and increased osteoporosis and osteomalacia (bone softening) risk in GLP‑1 users, particularly when weight loss is rapid and nutrition is poor, while fracture risk is only lightly flagged—if at all—in consumer‑facing materials.
“If you take a powerful appetite suppressant like GLP-1s, eat very little, and don’t move, your body will absolutely lose muscle and bone along with fat. This will not make you healthier.”
What worries me as both an anesthesiologist and lifestyle medicine physician is the lack of transparency and monitoring around what’s actually happening to the body. A 2026 systematic review in Obesity Reviews found that out of 10,000+ participants in GLP‑1 and related weight‑loss trials, only a tiny fraction of studies bothered to measure what people were eating or how their nutrient intake changed—meaning we’re largely “flying blind” on nutrition and body composition.
At the same time, there are now thousands of consolidated lawsuits in federal court (MDL 3094) alleging serious gastrointestinal injuries, including gastroparesis (essentially stomach paralysis), which is not a trivial side effect when I'm thinking about the serious risk people have going into surgeries as we manage airways and aspiration risk. In February 2026 (just weeks ago!), the FDA has formally called out at least one major GLP‑1 ad as “false or misleading,” underscoring how marketing often gets ahead of the data.
“GLP‑1 drugs are not ‘bad’ drugs—but the way they’re marketed and monitored often leaves patients under‑informed and under‑protected.”
The good news is that we are not helpless passengers in this process. The same literature that raises alarms also shows us how to protect patients--and this is where being an educated consumer comes into play.
How to Fight the Bone and Muscle Loss
When GLP‑1 therapy is combined with a structured resistance‑training program and adequate protein intake, loss of muscle and bone is dramatically reduced, and in some trials bone density at the spine and hip is essentially preserved compared with GLP‑1 alone. In practice, that means aiming for:
Resistance Training
At minimum, 2 days per week of whole‑body strength work
Aim for at least 5-6 exercises that covers all major muscle groups
For each exercise, aim for 2-3 sets of 10-15 controlled reps, progressing load over time
Proper Nutrition and Protein Intake
Roughly 1.2–1.6 g of protein per kg per day (adjusted to age, kidney function, and clinical context so this really depends on the individual.)
Protein‑forward meals and snacks (prioritizing protein when appetite is low)
Make sure you are choosing Nutrient‑dense WHOLE FOODS to support bone (calcium, vitamin D, magnesium) and overall micronutrient status. Your nutrients should ideally come from your DIET--not supplements. Supplements, as the name confers, is to SUPPLEMENT your diet... not replace!
My message to patients and colleagues is this: GLP‑1 drugs can be life‑changing, but they should NEVER be treated as a stand‑alone, set‑it‑and‑forget‑it solution. We need to be upfront that:
Stopping these medications often leads to partial weight regain. Therefore while you are losing the weight, it's imperative we are building healthy routines to maintain that weight loss.
Know that lean mass is at real risk WITHOUT a plan for strength and nutrition. Therefore, we need to include proper nutrition and resistance training into your weight-loss plan. This is not a recommendation; it is a must.
Rare but serious complications—like gastroparesis—are real enough that thousands of people now have legal cases pending. Know that medications are never without risk, so make an educated decision with your provider.
If you have a question about this content or want some guidance on how to change your lifestyle or fitness behaviors, feel free to email me at drfrangopoulos@atlasmd360.com.
Disclaimer: This is only general advice--not personal advice. Always talk to your healthcare provider about making significant life changes!
