GLP-1 Medications: Injury, Rehab, & Strength Training

With roughly 1 in 8 U.S. adults currently taking GLP-1 medications, the intersection of metabolic health and physical rehabilitation is shifting faster than ever. These medications are undeniably effective for glycemic control and weight management, but as rehabilitation providers, we are seeing the downstream physical consequences in our clinics every day.

I recently sat down with Dr. Julie Mulcahy on the Rehab and Performance Lab podcast to discuss how rehab providers must adapt their screening, differential diagnosis, and exercise prescriptions to manage these patients effectively.

Here are key clinical takeaways from our conversation and what you need to focus on in your practice:

1. Update Your Screening Process

Because of how widespread GLP-1 usage has become, we need to be far more intentional during our history taking. Instead of relying on standard medication lists where patients often omit injectable weight-loss therapies, try asking:

"What supplements or medications are you using to manage your health?"

This open-ended approach yields far more accurate information regarding GLP-1 usage.

Additionally, we have to rethink how we interpret rapid weight loss. Traditionally, weight loss is treated as a potential red flag. In patients taking GLP-1s, the weight loss is expected, but explained weight loss can easily mask other critical red flags. Do not overlook constitutional symptoms (e.g., severe fatigue, nausea, unexplained weakness, or systemic changes) simply because the patient is intentionally losing weight on a prescription.

2. Recognize the Musculoskeletal Cost (The 30% Rule)

Up to 30% of the weight lost on GLP-1 therapy can come directly from lean muscle mass.

From a musculoskeletal standpoint, this rapid loss of high-quality muscle tissue severely degrades tissue capacity. If a patient experiences a drop in muscle mass and then attempts new physical activities or increased training loads, the surrounding tissues simply may not be structurally prepared to handle the force. In many cases, the loss of tissue quality itself is the root cause bringing the patient into your clinic with pain or dysfunction.

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3. Prescribe High-Quality, High-Intensity Strength Training

The good news is that targeted strength training can directly mitigate GLP-1-induced muscle loss. However, prescribing basic or low-intensity exercise isn't enough.

• Dose Appropriately: If the loading stimulus isn't high enough, it won't trigger the necessary neuromuscular adaptations to preserve muscle mass. See the Is 3×10 the Best? A Modern Approach to Strength in Rehab article.
• Educate on Progression: Patients need clear guidance on how to perform resistance training safely, how to progress load systematically, and how to maintain the right level of intensity without causing breakdown.

As rehabilitation professionals, our role goes beyond managing localized joint pain. We have to guide these patients through safe, adequate loading to ensure they preserve vital muscle tissue and long-term functional power.

If you want to go deeper into practical frameworks for building resilient athletes and patients, we discuss these types of real-world clinical challenges every week inside the Coaches Club. We'd love to have you join the community to get your questions answered and take your practice to the next level.

You can listen to the episode at the links below. If you'd like CEUs, make sure to use the MedBridge link.