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
Best Gym Program For Weight Loss in the UK
Finding the best gym programme for weight loss involves combining resistance training, cardiovascular exercise, and consistent effort. The most effective approach pairs regular exercise with dietary changes and, where appropriate, medical support. The NHS recommends at least 150 minutes of moderate-intensity aerobic activity weekly, alongside strength training twice per week. Weight management in the UK increasingly includes prescription weight loss medication alongside exercise, creating a comprehensive approach to sustainable results. This guide covers evidence-based gym programmes and how they fit into your overall weight loss strategy.
10,000+ calculations today ยท NHS-aligned thresholds ยท 100% free
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/mยฒ).
While BMI isn't a perfect measure โ it doesn't account for muscle mass, bone density, or fat distribution โ 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 โ 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.
What Makes an Effective Gym Programme For Weight Loss?
An effective gym programme combines three key elements: cardiovascular exercise, resistance training, and progressive overload. Cardiovascular work (running, cycling, swimming) burns calories during exercise; resistance training builds muscle, which increases your resting metabolic rate. The NHS recommends 150 minutes of moderate-intensity aerobic activity per week alongside two strength training sessions.
- Resistance training: Builds lean muscle mass, which supports long-term weight management. Aim for major muscle groups twice weekly.
- Cardiovascular exercise: Burns calories efficiently. Include both steady-state cardio and high-intensity interval training (HIIT).
- Consistency: A sustainable programme beats an intense short-term effort. Most effective programmes span 12+ weeks.
- Progressive challenge: Gradually increase weight, reps, or intensity to continue seeing results.
Use our free BMI calculator above to track how your fitness programme affects your overall health metrics. Most people see meaningful BMI improvements after 8โ12 weeks of consistent exercise.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care โ from a UK-regulated online pharmacy.
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 โ 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 โ completely free.
Combining Gym Exercise With Weight Loss Support
Exercise alone typically results in modest weight loss โ research shows that diet is responsible for approximately clinically studied weight loss results. The most sustainable approach combines your gym programme with dietary changes and, where appropriate, medical support. The NHS offers tier 1 and tier 2 weight management resources including digital programmes and community support. For those with a BMI of 30 or above, or 27โ29.9 with weight-related health conditions, prescription weight loss medication may be available through NHS specialist services or private assessment.
Our GLP-1 weight loss calculator can help estimate potential outcomes when medication is combined with exercise. Track your progress using our free progress tracker to see how your gym routine and weight management strategy are working together.
- 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 โ 5mg โ 7.5mg โ 10mg โ 12.5mg โ 15mg
- GLP-1 receptor agonist
- Up to 15โ17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg โ 0.5mg โ 1mg โ 1.7mg โ 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 | 15โ22.5% | 12โ17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20โ32 weeks | 16โ20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | ยฃ150โยฃ250/month | ยฃ150โยฃ300/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 โ 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 go to the gym for weight loss?
The NHS recommends at least 150 minutes of moderate-intensity aerobic activity weekly plus two strength training sessions. This typically means 3โ5 gym sessions per week. Consistency matters more than intensity โ a sustainable schedule you'll maintain beats an aggressive plan you'll abandon.
What's the best type of exercise for weight loss โ cardio or weights?
Both are essential. Cardiovascular exercise burns calories efficiently during workouts. Resistance training builds muscle, which increases your resting metabolic rate and supports long-term weight management. Combining both gives the best results alongside dietary changes.
Can I lose weight through gym exercise alone?
Exercise is important but diet is key โ approximately clinically studied weight loss comes from calorie deficit through diet. A gym programme alone typically results in modest loss. Combining consistent exercise with dietary changes produces sustainable results.
How long before I see weight loss results from the gym?
Most people notice changes in body composition within 4โ6 weeks and meaningful weight loss within 8โ12 weeks. Results depend on consistency, intensity, diet, and individual factors. Use our free BMI calculator and progress tracker to monitor improvements.
What if I have a high BMI โ should I start the gym or focus on diet first?
Start both together. Begin with low-impact cardio (walking, swimming, cycling) if you're new to exercise, and make dietary changes simultaneously. Your GP can advise on suitable starting points. If you have a BMI of 30 or above, ask your GP about NHS weight management support and prescription options.
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.