If you are exercising while taking Ozempic, one goal should sit above the rest: keep the muscle you have. Ozempic can drive real weight loss, but a share of what comes off can be lean muscle, not just fat. This guide covers what Ozempic is, how it works, what the evidence shows, the muscle catch, and how to train so your results hold. It is general information, not medical advice.
What Ozempic is
Ozempic is the brand name for semaglutide, a once-weekly injectable made by Novo Nordisk. Importantly, Ozempic is FDA-approved to treat type 2 diabetes in adults, and to reduce cardiovascular risk in adults with type 2 diabetes and heart disease. It is not FDA-approved for weight loss. Using Ozempic purely to lose weight is off-label; the same drug at a higher dose is approved for weight management under a different brand, Wegovy. Ozempic is prescription-only.
How it works
Semaglutide is a GLP-1 receptor agonist. It mimics a natural gut hormone, GLP-1, that your body releases after eating. That does three useful things: it prompts the pancreas to release insulin when blood sugar is high, it slows how fast your stomach empties, and it signals fullness to the brain. The result is better blood-sugar control and reduced appetite, which is why many people also lose weight on it.
The evidence
Semaglutide was studied in the large SUSTAIN trial program in people with type 2 diabetes. In SUSTAIN-6, published in the New England Journal of Medicine (2016), semaglutide significantly reduced the rate of major cardiovascular events versus placebo, and participants also lost weight compared with placebo. Common side effects across the program were mostly gastrointestinal, nausea, diarrhea, vomiting and constipation, usually worst when starting or increasing the dose.
The muscle catch
Here is what the before-and-after photos leave out: rapid weight loss costs muscle as well as fat. A 2026 meta-analysis in the International Journal of Obesity found that roughly 20 to 30 percent of the weight lost on GLP-1 medications can come from lean mass. Losing muscle lowers your resting metabolism and makes weight easier to regain, which matters because appetite and weight often rebound after people stop. The fix is well established: resistance training two to four times a week plus adequate protein (research-backed targets are around 1.2 to 2.0 grams per kilogram of body weight daily) preserves muscle during treatment and helps sustain results afterward.
How Cadoo helps
The strength work is what protects your muscle, and doing it consistently for months is the hard part, especially when appetite and motivation dip. Cadoo lets you stake money with friends on hitting your fitness goals, turning accountability into real stakes and a group chat instead of willpower. Your phone's camera counts and form-scores bodyweight reps like squats and pushups, so a workout only counts when you actually do it, and steps and distance sync from Apple Health and Google Health Connect. Recurring weekly challenges keep you training through the long haul. Cadoo does not change your medication or its effects, and never encourages starting a drug; its only job is to help you put in the exercise that preserves muscle.
Before you start
Ozempic is prescription-only. Talk to your doctor before starting, stopping or changing any medication or exercise program, and individual results vary. This article is general information, not medical advice. Cadoo is not affiliated with, endorsed by or sponsored by Novo Nordisk or any manufacturer; Ozempic and Wegovy are trademarks of their owners, used here editorially.
Frequently asked questions
Can you exercise on Ozempic?
Yes, and it is recommended. Resistance training plus adequate protein is the best-supported way to preserve lean muscle while losing weight on semaglutide. Start gradually, stay hydrated because nausea and reduced appetite are common, and clear any new program with your doctor first.
Does Ozempic cause muscle loss?
It can. Rapid weight loss on GLP-1 drugs like Ozempic can draw 20 to 30 percent of the loss from lean mass, per a 2026 meta-analysis in the International Journal of Obesity. Strength training and protein are what protect the muscle you keep.
What are the best workouts on Ozempic?
Prioritize resistance training two to four times a week covering all major muscle groups, plus daily steps and movement. Progressive strength work signals your body to hold onto muscle even in a calorie deficit, protecting your metabolism and long-term results.
Is Ozempic approved for weight loss?
No. Ozempic is FDA-approved for type 2 diabetes and, for people with diabetes and heart disease, cardiovascular risk reduction. Using it for weight loss is off-label. The same drug, semaglutide, is approved for weight management under the brand Wegovy.
