New data shows GLP-1 weight loss drugs actually reduce exercise, especially in men and people with joint pain.
People starting Ozempic, Wegovy, and similar weight loss drugs walk about 500 fewer steps per day and exercise 6 minutes less daily compared to before treatment. A study tracking 753 people with obesity found this drop happened consistently after starting GLP-1 medications, with men and those with joint pain showing the biggest declines in activity.
This contradicts the common assumption that losing weight automatically makes people more active. The reality is messier: these drugs can cause fatigue as a side effect, and rapid weight loss itself is physically draining. Your body is adapting to major metabolic changes, which can make that evening walk feel harder, not easier, even as the scale drops.
The exercise reduction matters because muscle preservation during weight loss requires activity, not just medication. Without movement, you lose more muscle mass as you shed pounds, which can slow your metabolism long-term. The most successful weight maintenance happens when diet changes and regular movement work together, not when drugs do all the heavy lifting.
What You Can Actually Do Today
- Track your daily steps for one week to establish your current baseline before or after starting any weight loss medication
- Schedule three 10-minute walks per day instead of trying to fit in one longer workout if fatigue is an issue
- Add basic resistance exercises twice weekly using bodyweight or light weights to preserve muscle during weight loss
Consult your prescribing doctor before changing exercise routines while taking GLP-1 medications, especially if you have joint problems.
