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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Running and Weight Loss — A Practical UK Guide
Running is one of the most effective forms of physical activity for weight loss because it burns significant calories and supports sustainable weight management. Whether you're looking to lose weight through exercise alone or combining running with other approaches like dietary changes, understanding how running contributes to weight loss can help you set realistic goals. This guide covers how running burns calories, what pace works best, and how to combine running with other weight loss strategies for the best results.
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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 more calories per minute than most other exercises, making it highly effective for creating the calorie deficit needed for weight loss. The number of calories you burn depends on your current weight, running pace, and duration. For example, a person weighing 70kg running at a moderate pace (8 min/mile) for 30 minutes burns approximately 300–350 calories. To achieve weight loss of around 0.5–1kg per week (the NHS recommended safe rate), you typically need a total calorie deficit of approximately 500 calories per day through a combination of reduced food intake and increased activity.
- Steady-state running (moderate pace): Burns calories during and slightly after the run; best for building endurance and consistency
- High-intensity interval training (HIIT): Burns calories during and for hours afterwards; more time-efficient but requires fitness base
- Longer, slower runs: Use fat as a primary fuel source and build aerobic fitness
Running also improves cardiovascular health, which is important for anyone managing weight-related health conditions like high blood pressure or prediabetes.
Clinically BackedWeight Loss
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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 Nutrition and Other Weight Loss Approaches
Running alone is unlikely to produce significant weight loss without dietary changes. The most sustainable approach combines regular physical activity with a reduced-calorie diet aligned with NHS weight management guidance. Most people find success losing weight at around 0.5–1kg per week when combining exercise with a calorie deficit of approximately 500 calories daily. If you're looking to optimise weight management further, discuss options with your GP, who can advise on prescription weight loss medication alongside lifestyle changes if appropriate.
- Track your running using apps to monitor consistency and progress
- Use our free progress tracker to log both running activity and weight changes
- Combine running with strength training to preserve muscle mass during weight loss
- 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 running burn?
This varies by body weight, pace, and duration. Someone weighing 70kg running at moderate pace for 30 minutes typically burns 300–350 calories. Heavier individuals burn more; lighter individuals burn fewer. Faster paces also burn more calories per minute than slower runs.
Can I lose weight by running alone without changing my diet?
Running can support weight loss, but combining it with dietary changes is far more effective. Most people need a calorie deficit of around 500 calories daily to lose 0.5–1kg per week. You can create this through exercise, diet, or a combination of both. Diet change alone is often easier to sustain than relying on exercise alone.
What's the best running pace for weight loss?
The best pace is one you can sustain consistently. Moderate-pace steady runs (where you can hold a conversation but not sing) are ideal for building a habit. High-intensity interval training burns more calories but requires a fitness base. Mix both approaches for best results.
How often should I run to lose weight?
The NHS recommends at least 150 minutes of moderate-intensity activity per week. This could be five 30-minute runs, or three longer runs with rest days. Consistency matters more than intensity — running regularly at sustainable pace produces better long-term results than sporadic hard efforts.
Should I check my BMI before starting a running programme?
Knowing your BMI can help you set realistic weight loss targets. Use our free BMI calculator to understand your current position and what a healthy weight range looks like for your height. This context helps you plan realistic timescales. Always speak to your GP before starting a new exercise programme, especially if you have existing health conditions.
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.