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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Weight Loss With Aerobics
Aerobic exercise is an effective way to support weight loss when combined with a healthy diet and calorie deficit. Regular aerobic activity burns calories, strengthens your cardiovascular system, and improves overall fitness. Whether you're looking to manage your weight through exercise alone or alongside other weight management approaches like prescription weight loss medication, understanding how aerobics contributes to sustainable weight loss is key. This guide explains the science, practical tips, and how aerobics fits into a comprehensive weight management strategy for UK adults.
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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 Aerobics Supports Weight Loss
Aerobic exercise burns calories during and after activity. During a typical aerobics session, your body burns energy to fuel movement. The exact number of calories burned depends on your current weight, fitness level, exercise intensity, and duration. A general guide: a 70kg person doing moderate-intensity aerobics (like brisk walking, light jogging, or dancing) burns approximately 300–400 calories per 30–45 minute session. Higher intensity (running, circuit aerobics, spin classes) can burn 400–600 calories in the same timeframe.
For sustainable weight loss, the NHS recommends losing 0.5 to 1 kg per week. This typically requires a calorie deficit of around 500 calories per day — a combination of reduced food intake and increased physical activity. Aerobics is an efficient way to create this deficit without severely restricting diet, making it more sustainable long-term.
- Aerobics improves cardiovascular health, which is especially important if you are overweight or have weight-related health conditions
- Regular aerobic activity helps preserve muscle mass during weight loss, unlike diet alone
- Exercise improves insulin sensitivity and blood sugar control, reducing type 2 diabetes risk
- The "afterburn effect" (EPOC) means your body continues burning calories at an elevated rate for several hours after exercise
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 Aerobics With Other Weight Management Approaches
Aerobics is most effective when combined with dietary changes. Exercise alone is rarely sufficient for significant weight loss — diet typically accounts for 70–clinically studied weight loss success. The combination of aerobic activity plus a reduced-calorie diet creates the strongest foundation for sustainable results. For weight management UK adults, the NHS recommends both increased physical activity and dietary improvements for best outcomes.
For adults who are eligible, prescription weight loss medication like Mounjaro or Wegovy may be combined with aerobics for enhanced results. These GLP-1 medications work alongside lifestyle changes, not instead of them. Use our free weight loss calculator to explore how different approaches may support your weight management goals, and consult your GP about the most suitable strategy for your circumstances.
- 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 times per week should I do aerobics for weight loss?
The NHS recommends at least 150 minutes of moderate-intensity aerobic activity per week, or 75 minutes of vigorous-intensity activity. This can be split across 3–5 sessions. Consistency matters more than intensity — regular, sustainable activity beats sporadic intense exercise. Start with what fits your schedule and gradually increase.
Can aerobics alone cause significant weight loss without changing diet?
Aerobics alone typically produces modest weight loss. Most weight loss comes from calorie deficit through diet. However, combining regular aerobics with even modest dietary improvements (like reducing sugary drinks or processed foods) is much more effective. A GP can advise on the best approach for your personal situation.
What type of aerobic exercise is best for weight loss?
Any aerobic activity that elevates your heart rate works — walking, jogging, cycling, swimming, dancing, aerobics classes, or rowing. Choose something you enjoy and can sustain regularly. Higher-intensity options (running, spin classes) burn more calories per minute, but moderate-intensity activities sustained longer are often more sustainable for most people.
How long before I see weight loss results from aerobics?
With consistent aerobic exercise and dietary support, most people notice changes within 4–6 weeks. Weight may drop gradually at first (0.5–1 kg per week is a healthy rate), but improvements in energy, fitness, and how clothes fit often appear sooner. Use our BMI calculator to track your progress and stay motivated.
Is aerobics better than strength training for weight loss?
Both are valuable. Aerobics burns more calories during exercise; strength training builds muscle, which increases resting metabolic rate long-term. A combination of both — aerobic activity for calorie burn plus resistance work for muscle preservation — is ideal for sustainable weight loss and overall health.
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.