The UK's most complete GLP-1 guide
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- 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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Walking for Weight Loss: What to Expect Before and After
Walking is one of the most accessible forms of physical activity for weight loss, and it can genuinely help when combined with other lifestyle changes. Regular walking burns calories, supports cardiovascular health, and is easier to maintain long-term than intense exercise. However, weight loss results depend on several factors including your current weight, walking intensity, diet, and overall activity level. This guide explains how walking contributes to weight management in the UK context, what realistic progress looks like, and how to maximise results alongside other evidence-based approaches.
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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.
How Walking Supports Weight Loss
Walking burns calories, though the amount depends on your body weight, walking pace, and terrain. A person weighing 70kg walking at a moderate pace (4–5 km/h) for 30 minutes typically burns around 120–150 calories. To lose weight, you need a calorie deficit — and while walking alone may not create enough deficit, it contributes meaningfully when combined with dietary changes.
- Calorie expenditure: Increases with body weight and walking intensity (hills, faster pace)
- Metabolic benefits: Regular walking improves insulin sensitivity and metabolic health
- Sustainability: Walking is low-impact, reducing injury risk compared to running or high-intensity exercise
- Appetite regulation: Physical activity may help regulate hunger hormones, supporting better food choices
The NHS recommends 150 minutes of moderate-intensity activity per week for adults. Walking can contribute significantly to this target. For weight loss to occur, walking should be paired with a reduced-calorie diet — a deficit of around 500 kcal/day typically results in losing approximately 0.5 kg per week. Try our free BMI calculator to establish your current health baseline, and use our weight converter if you want to track progress in different units (kg, stone, or lbs).
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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.
Realistic Timelines and Progress Expectations
Weight loss timelines vary widely depending on starting weight, diet, walking frequency, and other factors. Most people begin noticing physical changes within 4–6 weeks of consistent walking combined with dietary changes, though scale changes may take longer. Someone starting with a higher BMI typically sees faster initial progress than someone already in a healthy weight range.
Consistency matters more than intensity. Walking five days per week for 30 minutes is more effective long-term than sporadic intense exercise. Many people find "before and after" transformations more noticeable when walking is sustained for 8–12 weeks alongside calorie reduction. Beyond physical changes, regular walkers often report improved energy, better sleep, and reduced stress — benefits that appear before significant weight loss.
Track your progress using our free progress tracker to log weekly weight changes and walking activity. This helps identify patterns and maintain motivation over time. If you're exploring prescription weight management options alongside lifestyle changes, the NHS Weight Loss Plan and specialist services can provide structured support. Some people also benefit from GLP-1 weight loss medications as part of a comprehensive approach — discuss with your GP whether this might be appropriate for you.
- 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 much weight can I lose by walking?
Weight loss from walking depends on your current weight, walking frequency, pace, and diet. Walking 30 minutes daily at moderate pace, combined with a calorie deficit, typically supports loss of 0.5–1 kg per week. Use our free BMI calculator to establish your baseline, then track progress weekly to see what works for you.
How long before I see weight loss results from walking?
Physical changes often appear within 4–6 weeks of consistent walking with dietary changes. Scale weight may move more slowly. Most people see noticeable results after 8–12 weeks of sustained effort. Individual timelines vary based on starting weight, diet adherence, and overall activity level.
Is walking enough for weight loss on its own?
Walking alone rarely creates enough calorie deficit for significant weight loss. The NHS recommends combining physical activity with dietary changes — a 500 kcal/day deficit (through diet and exercise combined) typically supports 0.5 kg weekly loss. Walking works best alongside reduced-calorie eating.
What's the difference between walking and other exercise for weight loss?
Walking is lower intensity than running but more sustainable for many people. It burns fewer calories per session but is easier to maintain long-term and carries lower injury risk. The best exercise is the one you'll do consistently — for many, that's walking.
Should I combine walking with other weight loss methods?
Yes. Walking combined with dietary changes is more effective than either alone. Some people also benefit from NHS weight management services, behaviour change programmes, or prescription weight loss support. Discuss options with your GP to create a plan tailored to your situation.
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.