Doctors Warn GLP-1 Users to Prioritize Strength Training as Muscle Loss Concerns Grow

<p>Doctors are urging patients on GLP-1 weight loss medications to add strength training and increase protein intake, as concerns about muscle loss during treatment have grown in 2026. A survey of more than 400 healthcare providers found that 90 percent identified an aged appearance and loss of muscle tone as significant concerns among their patients.</p>

<p>Data shows that lean body mass can account for 15 to 40 percent of the total weight lost during GLP-1 therapy. Patients have reported skin laxity, reduced muscle contour, and changes in posture. These observations have driven demand for aesthetic treatments such as muscle stimulation devices.</p>

<p>Some research offers a more reassuring picture. A study published in Cell Reports Medicine found that while absolute muscle mass may decrease slightly, relative muscle mass and strength often improve during GLP-1 treatment. Researchers argue that some muscle loss is a normal physiological response to weight reduction, since the body no longer needs to support the same load.</p>

<p>A Phase 2b clinical trial called BELIEVE evaluated the combination of semaglutide with bimagrumab. The combination increased the proportion of weight lost from fat while preserving lean mass, suggesting that combination therapies may address the muscle loss issue.</p>

<p>Providers are now treating GLP-1 prescriptions as the first step in a broader care plan. Standard recommendations include consistent resistance training, adequate dietary protein, and structured step-down protocols to manage weight regain when patients stop the medication.</p>

<p>New technologies are also in development. Continuous protein biosensors designed to track lean muscle loss and protein intake in real time are being tested, with the goal of giving patients and providers better data to guide treatment decisions.</p>