Verdict: Worth it
Research reviews report that part of the weight lost on these therapies, like any large weight loss, comes from lean mass. Some researchers think the muscle change is roughly what the weight loss would predict. Either way, strength training and enough protein are the well-supported ways to protect muscle during any weight loss.
What it is
GLP-1 medicines are prescription drugs. Questions about whether to use them, doses or side effects belong with your prescriber. We give no advice about them.
Why it is trending
With millions of people now on these medicines, "how to keep muscle on GLP-1" has become a common fitness question.
How to try it safely
- Lift 2–3 times a week, full body, focusing on squats, hinges, pushes and pulls.
- Spread protein across meals. Ask your care team what target is right for you, especially if appetite is low.
- Keep walking daily for heart and blood-sugar health.
- Tell your prescriber about any new training or diet plan. Do not change a medicine on your own.
Sources
- Changes in lean body mass with glucagon-like peptide-1-based therapies and mitigation strategies. PubMed 38937282
- Effect of Incretin-Based and Nonpharmacologic Weight Loss on Body Composition : A Systematic Review. PubMed 41996180
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