If you're on Wegovy or Mounjaro, prioritising resistance training will likely support the best results. It helps protects muscle while the weight comes off, and NHS guidance recommends muscle-strengthening activity at least twice a week.1 For the full picture on why muscle matters and how the two pillars work together, see our complete guide to exercising on Wegovy or Mounjaro and our guide to muscle loss on GLP-1 medications.
That said, you should still incorporate cardio into your exercise plan. Aerobic exercise supports your heart, lungs and everyday energy while the calorie deficit does its work. The general target is at least 150 minutes of moderate intensity activity a week, or 75 minutes of vigorous activity, and any of the options below count towards that total.2
So what are the best cardio exercises for GLP-1 weight loss? Below are seven options, from the gentlest starting points to more demanding ones, so you can build a routine that suits your fitness level and how you're feeling week to week. For a list that covers strength, core and balance work, see our companion guide on the best strength exercises to do while taking Wegovy or Mounjaro.
1. Walking
Walking is the most accessible cardio option on this list, and often the best place to start, especially in the first few weeks of treatment while side effects like nausea and fatigue are settling. NHS guidance counts brisk walking as moderate intensity activity, meaning you can still talk but not sing while doing it.2
A brisk pace is roughly 3 miles an hour, and it's fine to build up to it gradually rather than starting there.3 If joint pain makes walking uncomfortable, your local pool may run water-based exercise classes instead, since water takes the weight off your joints while you move.3
A short 10-minute walk still counts towards your weekly total, so there's no need to wait until you can manage a full hour before you start. It's a practical first move on days when a harder session doesn't feel realistic, and a natural on-ramp to the other options on this list as your fitness builds.
2. Cycling
Cycling, whether outdoors or on a stationary bike, is low-impact and easy to scale up or down depending on how you're feeling. Riding on level ground counts as moderate intensity, while tackling hills or riding faster tips it into vigorous.2
Because the saddle supports your weight rather than your legs alone, cycling tends to put less strain through the knees and hips than running or jogging. A stationary bike at home or in a gym also removes weather and traffic as reasons to skip a session, and most have a screen showing your effort level, which makes it easier to judge whether you're working at a moderate or vigorous pace.
3. Swimming
Swimming is one of the most joint-friendly cardio options available, since the water supports your body weight while you move.3 This makes it a strong choice if joint pain or a higher starting body weight makes walking or cycling uncomfortable in the early stages.
Swimming at a steady pace typically counts as vigorous intensity activity, so shorter sessions can still contribute meaningfully towards your weekly target.2 Many local pools also run aqua aerobics classes, which offer similar benefits without needing to swim lengths.
4. Rowing
A rowing machine works the legs, back and arms in one movement, making it a useful bridge between pure cardio and light resistance work. The seated, supported position also takes pressure off the knees and hips compared with running.
Start with shorter sessions at a lower resistance and focus on proper technique - pulling with your legs and back before your arms, rather than trying to be as fast as possible straight away. Because rowing brings in more muscle groups than walking or cycling, it can feel more demanding for the same amount of time, so build up gradually and stop before your form breaks down.
Most gyms have rowing machines available, and a short 10 to 15-minute session is enough to start noticing the benefit, particularly if you're pairing it with the resistance training covered elsewhere in this series.
5. Elliptical (cross-trainer)
The elliptical, or cross-trainer, gives a similar cardiovascular workout to running without the repeated impact of your feet striking the ground, which makes it a comfortable option if you're managing joint discomfort. Most machines let you adjust resistance and incline, so you can work at a pace that you're comfortable with and increase as you get fitter and more confident.
Because the pedals guide your feet through a fixed path, the elliptical can be a safer way to build cardio fitness if balance is a concern. Many machines also let you use the handles to bring your arms into the movement, which turns a leg-only workout into a fuller-body session without any extra equipment.
6. Incline treadmill walking
Walking on an incline raises your heart rate and effort level without the joint impact of jogging or running, making it a natural next step once flat walking starts to feel easy. Even a small incline of around 3 to 5 percent can turn a comfortable walk into a challenging session.
This is a useful option if you want more intensity from a familiar movement, particularly on days when the weather rules out walking outdoors. Start with a gentle incline and a pace you can sustain for the full session, then increase either the slope or the speed as it starts to feel easier.
7. Stationary bike intervals
If time is tight, short intervals on a stationary bike, alternating harder efforts with easier recovery periods, can deliver a similar benefit to a longer, steady session. This very vigorous, stop-start style of training is known as High Intensity Interval Training, or HIIT.2
That said, it's worth using HIIT sparingly rather than as your default while you're in a significant calorie deficit. Many people find that pushing hard on top of reduced food intake leaves them more fatigued than usual, so a couple of shorter interval sessions a week, alongside your other cardio, tends to work better than replacing everything else with high-intensity training. A simple structure to try is 20 to 30 seconds of harder effort followed by 60 to 90 seconds of easy pedalling to recover, repeated for 10 to 15 minutes. If in doubt, dial the effort back and lean on the steadier options above.
Frequently Asked Questions
How much cardio should I do while taking Wegovy or Mounjaro?
The general guidance for most adults is at least 150 minutes of moderate intensity cardio a week, or 75 minutes of vigorous activity, alongside muscle-strengthening exercise on at least two days. There is no separate official target for people taking Wegovy or Mounjaro, so this is a sensible starting point to build towards gradually.
Is cardio or strength training more important for GLP-1 weight loss?
Strength training is generally considered the priority, since it helps protect muscle while you are in a calorie deficit. Cardio still matters for heart and lung health and everyday energy, but it works best alongside resistance training rather than instead of it.
What is the best cardio exercise if I have joint pain?
Swimming and cycling tend to be the most joint-friendly options, since the water or the saddle takes the weight off your joints. Walking on a flat surface is also a gentle starting point if pool or bike access is limited.
Can I still do cardio if I feel nauseous on Wegovy or Mounjaro?
Gentle options like walking are usually well tolerated, even during periods of nausea. Keep the intensity low on days when you are not feeling well, and speak to your GP or pharmacist if nausea is persistent or severe.
Is HIIT safe while taking Wegovy or Mounjaro?
HIIT is not unsafe, but it is worth using sparingly rather than as your main form of cardio while you are in a significant calorie deficit, since many people find it more fatiguing than usual. Steadier options like walking, cycling or swimming tend to suit most people better day to day.
How soon after starting Wegovy or Mounjaro can I start doing cardio?
There is no set waiting period, and gentle activity like walking is usually fine from the start. If you are new to exercise or have any underlying health conditions, check with your GP before increasing intensity.
References
- NHS. How to improve your strength and flexibility. nhs.uk
- NHS. Physical activity guidelines for adults aged 19 to 64. nhs.uk
- NHS. Walking for health. nhs.uk
This article is intended for informational purposes only and does not replace professional medical advice. Always read the patient information leaflet supplied with your medication and speak to a healthcare professional if you have specific concerns.