The Journal · Strength Training
Strength Training on Mounjaro or Ozempic: Why Muscle Matters When You Lose Weight
The scale is finally moving. Your clothes fit differently. Then a friend says you look tired, and you notice the stairs feel harder than they used to. On weight-loss medication, what you lose matters as much as how much.
Fidelity Fitness Club in JLT Dubai put this guide together for anyone using GLP-1 medications such as Mounjaro (tirzepatide) or Ozempic and Wegovy (semaglutide). It explains why strength training matters during medical weight loss, what the research says about muscle loss, and how to build a safe routine with your doctor's approval.
GLP-1 medications such as Mounjaro and Ozempic reduce appetite, but a meaningful share of the weight lost can be muscle rather than fat. Resistance training two to three times a week, enough protein, and regular medical monitoring help protect muscle and strength. Always agree any exercise plan with the doctor managing your medication.
This article is general information, not medical advice. Speak to your doctor before starting or changing exercise while on any prescription medication.
Do you lose muscle on Mounjaro or Ozempic?
Yes, some muscle loss is likely on GLP-1 medications, because rapid weight loss usually removes both fat and lean tissue. In a body-composition sub-study of the STEP 1 semaglutide trial, total fat mass fell by 19.3% over 68 weeks, but total lean body mass also fell by 9.7% (King, Wilding et al., STEP 1 DEXA analysis, 2021).
Fat loss was twice as large, and the proportion of lean mass in the body actually rose, which is good news. Lean mass also includes more than muscle. The direction is still clear: without a reason to keep muscle, the body lets some of it go.
Muscle supports metabolism, joint stability, balance and everyday strength, especially from your forties onwards.
Why is strength training important on GLP-1 medications?
Strength training is important on GLP-1 medications because it gives the body a reason to keep muscle while fat is being lost. Lifting weights or using resistance machines signals muscles to adapt, which helps protect strength and lean mass during a calorie deficit.
UAE clinicians have made the same point. In a Khaleej Times report, Dubai fitness and medical experts said the medication suppresses appetite but does not build a stronger body, and recommended resistance training at least two to three times a week alongside regular medical monitoring.
The World Health Organization also recommends muscle-strengthening activity on two or more days a week for all adults (WHO physical activity guidelines).
How often should I strength train on Mounjaro or Ozempic?
Most people on GLP-1 medications should aim for two to three full-body strength sessions a week, on non-consecutive days, if their doctor agrees. Each session can be 30 to 45 minutes, covering legs, back, chest, shoulders and core with moderate weights.
A simple starting week:
| Day | Session | Focus |
|---|---|---|
| Monday | Full-body strength A | Leg press, seated row, chest press, plank |
| Wednesday | Walk, swim or easy cycle (30 min) | Low-intensity movement |
| Thursday | Full-body strength B | Goblet squat, lat pulldown, shoulder press, glute bridge |
| Saturday | Full-body strength A, or a BodyPump class | Repeat and progress the weights slowly |
Technogym resistance machines are a good starting point because they guide the movement and make it easy to track progress. Fidelity Fitness Club has 85+ Technogym machines across 17,000 sq ft at Almas Tower.
What should I eat to protect muscle on GLP-1 medications?
To protect muscle, prioritise protein at every meal and avoid eating so little that training becomes impossible. Reduced appetite on GLP-1 medications makes it easy to under-eat protein, so plan meals around a protein source first.
Ask your doctor or a registered dietitian for a protein target suited to you, and stay well hydrated in Dubai's climate.
Is it safe to exercise on weight-loss injections?
Exercise is generally encouraged on weight-loss injections, but it should be agreed with your doctor, especially in the first weeks or after a dose increase. Some people experience nausea, fatigue or dizziness, so start with moderate sessions and stop if you feel unwell.
Practical safety points:
- Eat a small meal or snack one to two hours before training if your doctor agrees.
- Tell your trainer you are on a GLP-1 medication.
- Progress weights gradually rather than chasing big jumps.
Should I work with a personal trainer on GLP-1 medications?
A personal trainer is helpful on GLP-1 medications if you are new to strength training, because correct technique and steady progression protect muscle more effectively than random workouts.
Fidelity Fitness Club has certified personal trainers for 1-to-1 and small group sessions, and every new member receives two Smart Start assessments, which give a baseline for strength and body composition. The Smart Start fitness assessment post explains what is measured. For broader fat loss strategy, see body recomposition in Dubai.
How do I start strength training at Fidelity Fitness Club?
Lift while you lose and the result is a lighter body that is also a stronger one, rather than a smaller version of a tired one.
Fidelity Fitness Club is at 1st floor, Almas Tower, Jumeirah Lake Towers (JLT), Dubai, a few minutes' walk from DMCC Metro Station on the Red Line, with parking within Almas Tower. Opening hours are Monday to Saturday 6:00am–11:00pm and Sunday 8:00am–8:00pm.
To book a tour, call 800 332 823, email info@fidelityfitnessclub.com, or visit fidelityfitnessclub.com. To ask about trial visits or guest access, contact the club on 800 332 823 or info@fidelityfitnessclub.com.
Frequently Asked Questions
Should I lift weights while taking Mounjaro or Ozempic? Fidelity Fitness Club in JLT encourages members on GLP-1 medications to discuss strength training with their doctor, because research shows some lean mass is lost alongside fat. UAE experts recommend resistance training two to three times a week, alongside medical monitoring and enough protein.
How much muscle do you lose on semaglutide? Fidelity Fitness Club refers to a body-composition sub-study of the STEP 1 trial, where total lean body mass fell by 9.7% and total fat mass by 19.3% over 68 weeks on semaglutide. Fat loss was larger, but the lean mass loss shows why resistance training and protein matter.
What is the best exercise on GLP-1 medication? Fidelity Fitness Club suggests full-body resistance training two to three times a week as the priority, supported by walking, swimming or cycling on other days. Guided Technogym machines are a simple starting point. Any plan should be agreed with the doctor managing your medication.
Can I join a gym while on weight-loss injections? Fidelity Fitness Club welcomes members who are using weight-loss medication, provided their doctor supports exercise. New members receive two Smart Start assessments, and certified personal trainers offer 1-to-1 and small group sessions. Tell your trainer about your medication so sessions can be adjusted safely.
