The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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Treadmill Workouts for Weight Loss in the UK
Treadmill workouts are one of the most effective and accessible ways to burn calories and support sustainable weight loss. Regular treadmill exercise can complement a reduced-calorie diet and help you achieve your weight management goals. However, for some people—particularly those with a BMI of 30 or above, or 27 or above with weight-related health conditions—prescription weight loss medication may be an option alongside exercise and lifestyle changes. This guide covers both treadmill training strategies and the UK prescription options available to eligible adults seeking additional support for weight loss.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
UK Prescription Weight Loss Options Available
If you're exercising on a treadmill and want additional support for weight management, several prescription medications are licensed in the UK. Mounjaro (tirzepatide) and Wegovy (semaglutide) are once-weekly injections that work alongside diet and exercise to help support weight loss. Saxenda (liraglutide) is a daily injection option. These medications are GLP-1 receptor agonists (Mounjaro is also a GIP agonist) that may help reduce appetite and support feeling fuller after meals. In clinical trials, adults taking these medications alongside lifestyle changes—including treadmill exercise—achieved average weight losses of 15–21% of body weight, though individual results vary significantly. All three options are prescription-only and require a clinical assessment from a GP or licensed prescriber to determine eligibility and suitability. Access through the NHS is via specialist weight management services, though waiting lists can be lengthy. Private prescribing is also available through online assessments with registered UK prescribers.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS vs Private Access and Next Steps
If you meet the eligibility criteria for prescription weight loss medication—BMI of 30 or above (or 27+ with weight-related conditions like type 2 diabetes or high blood pressure)—your first step is to speak with your GP. They can refer you to your local NHS specialist weight management service, though availability and waiting times vary significantly across the UK. Alternatively, private online prescribing services can assess your eligibility and issue a prescription if appropriate. Whether you choose the NHS or private route, prescription weight loss treatment works best when combined with regular physical activity (like your treadmill workouts) and sustained dietary changes. Use our free GLP-1 weight loss calculator to explore potential outcomes at different medication doses, and our BMI calculator to check whether you may be eligible for prescription support alongside your exercise routine.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
Will treadmill workouts alone help me lose weight?
Yes, treadmill exercise combined with a reduced-calorie diet supports sustainable weight loss. The NHS recommends aiming for 0.5–1 kg per week. However, if you have a BMI of 30 or above, prescription weight loss medication may provide additional support when used alongside treadmill training and lifestyle changes.
How long should I use the treadmill for weight loss?
The NHS recommends at least 150 minutes of moderate-intensity cardio per week for health. For weight loss, aim for 30–45 minutes on a treadmill most days, combined with strength training. Always consult your GP before starting a new exercise programme, especially if you have existing health conditions.
Can I take Mounjaro or Wegovy while exercising on a treadmill?
Yes. Prescription weight loss injections like Mounjaro and Wegovy are designed to work alongside diet and increased physical activity, including treadmill exercise. In fact, clinical trials combined medication with exercise and lifestyle changes. Discuss your exercise plans with your prescriber to ensure they're appropriate for you.
How do I find out if I'm eligible for prescription weight loss medication in the UK?
You're potentially eligible if you have a BMI of 30 or above, or 27 or above with a weight-related health condition (like type 2 diabetes). Speak with your GP, who can assess your eligibility and refer you to specialist NHS services. Private prescribing services can also conduct online assessments.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are once-weekly injections for weight loss. Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist; Wegovy (semaglutide) is a GLP-1 agonist only. In trials, Mounjaro showed slightly higher average weight loss (~15–21%) than Wegovy (~15%), though results vary individually. Your prescriber will recommend which is more suitable for you.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.