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
Free tracker included with every download this week
Running For Weight Loss: A UK Health Guide
Running is an effective way to support weight loss and improve overall fitness. Regular running burns significant calories, strengthens your cardiovascular system, and can help you achieve a healthy weight in line with NHS weight loss guidance. However, sustainable weight loss typically requires combining exercise with dietary changes. This guide explains how running fits into a comprehensive weight management plan, alongside other strategies like calorie reduction and, where appropriate, prescription weight loss support.
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Calculate Your BMI Instantly
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.
How Running Burns Calories and Supports Weight Loss
Running burns approximately 400–1,000 calories per hour depending on your body weight, running speed, and fitness level. A heavier person burns more calories at the same pace than a lighter person, making running an accessible form of exercise across different weight ranges.
- Steady-pace running: Burns 400–700 calories/hour; sustainable for regular training
- High-intensity interval training (HIIT): Burns 600–1,000+ calories/hour; shorter bursts of intense effort
- Long-distance running: Burns significant total calories; builds aerobic fitness
For weight loss, the NHS recommends a calorie deficit of approximately 500 kcal per day for sustainable loss of around 0.5 kg per week. Running alone can contribute to this deficit, but combining running with dietary changes produces more reliable results. You can track your progress using our free progress tracker to monitor both running activity and weight changes over time.
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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.
Combining Running With Other Weight Management Strategies
While running is beneficial for fitness and calorie burn, it works best as part of a broader weight management approach. The NHS weight loss pathway combines exercise, dietary change, and behavioural support. For adults seeking additional support beyond diet and exercise alone, prescription weight loss medications such as GLP-1 injections may be recommended by your GP or specialist.
Calculate your current BMI using our free BMI calculator to understand where you fall on the NHS weight categories. This can help your GP or prescriber assess whether additional support might be appropriate for you. Our GLP-1 weight loss calculator can also help you explore potential outcomes if prescription weight management is being considered alongside your running 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.
How many calories does 30 minutes of running burn?
A 70 kg person running at a moderate pace burns approximately 300–350 calories in 30 minutes. Heavier individuals burn more; lighter individuals burn less. Pace, terrain, and fitness level all affect calorie expenditure. Use a running app or fitness tracker for more personalised estimates.
How long does it take to lose weight from running alone?
Weight loss depends on calorie deficit. Running 5 times per week at moderate intensity may create a deficit of 300–400 kcal per day, supporting loss of approximately 0.3–0.5 kg per week. Combining running with dietary changes accelerates results. The NHS recommends losing no more than 0.5–1 kg per week for sustainable outcomes.
Is running safe for people carrying excess weight?
Running is generally safe at any weight, but start gradually to protect joints. Begin with a mix of running and walking, increase duration and intensity slowly, and consider supportive footwear. Consult your GP before starting a new exercise programme, especially if you have existing health conditions like joint problems or diabetes.
Can I lose weight by running without changing my diet?
Running alone typically results in slower weight loss than combining exercise with dietary change. For a 500 kcal daily deficit (0.5 kg weekly loss), you might need to run 60+ minutes daily. Reducing calorie intake by 250 kcal and burning 250 kcal through running is often more sustainable and achievable.
What if running and diet changes aren't working for me?
If you've been consistent with running and dietary changes for several months without adequate progress, discuss this with your GP. You may be eligible for NHS weight management support, including specialist services or prescription weight loss medication. Your GP can assess your individual situation and refer you to appropriate services in your area.
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.