"Should I be exercising on GLP-1" has a clearer answer than most weight-loss advice: yes, and specifically one type of exercise matters more than the others while you are on it. Here is why, and what that actually looks like.
Why this matters more right now than usual
Weight loss on GLP-1 medicine includes some loss of lean muscle mass alongside fat, and because the weight loss itself can happen quickly, the absolute amount of muscle lost can be more noticeable than with slower, diet-only weight loss. This makes the type of movement you do during treatment genuinely more consequential than it would be otherwise, not just a general health tip (PMC, 2024).
The type that actually matters: resistance training
Cardio is good for your heart and general fitness, but resistance training, meaning exercises that work your muscles against weight or resistance, is the type specifically shown to protect muscle during GLP-1 treatment. Guidance points to roughly two or more sessions a week as meaningfully protective, especially when paired with adequate protein (Medscape, 2025).
The numbers that make this concrete
In one study, people who received guidance on both resistance training and protein intake lost about 13% of their body weight over 6 months but only around 3% muscle mass, a far smaller share than typically seen without that guidance (Medscape, 2025). The medicine drives the weight loss; the resistance training decides what kind of weight it mostly is.
What this looks like without a gym
- Resistance training does not require a gym: bodyweight squats, push-ups, and resistance bands count.
- Two sessions a week is a realistic, evidence-backed target, not an all-or-nothing standard.
- Walking and general activity still matter for overall health, but are not a substitute for resistance work specifically.
- Starting light and building up matters more than intensity in the first weeks, especially alongside a new medicine.
The question is not whether to move while on GLP-1. It is whether that movement includes resistance training specifically, since that is the part the evidence actually points to.
If you are new to resistance training or unsure what is safe alongside your specific health picture, that is a reasonable thing to raise in a coaching or consult conversation, not something to guess at alone.
Sources
- Fundamental Body Composition Principles Provide Context for Fat-Free and Skeletal Muscle Loss With GLP-1 RA Treatments. PMC, 2024.
- Resistance Training Plus Protein May Lower GLP-1 RA Muscle Loss. Medscape, 2025.
This article is general information, not medical advice. A doctor decides what is right for you in a consultation.