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 Routine For Weight Loss At The Gym
A good gym routine for weight loss combines cardiovascular exercise, strength training, and consistency — but exercise alone may not be enough. Many UK adults find that combining regular gym activity with dietary changes, and in some cases prescription weight management medication, delivers the best results. This guide covers effective gym strategies alongside prescription weight loss options available through the NHS and private providers in the UK.
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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.
Effective Gym Routines For Weight Loss
An effective weight loss routine typically combines:
- Cardiovascular exercise: 150 minutes per week of moderate-intensity activity (brisk walking, running, cycling) or 75 minutes of vigorous activity. This burns calories and improves heart health.
- Strength training: 2–3 sessions weekly builds muscle, which increases your resting metabolic rate and helps preserve muscle during weight loss.
- Progressive intensity: Gradually increase difficulty over time — this prevents plateaus and keeps your body adapting.
- Consistency over perfection: A moderate routine followed regularly beats an intense routine done sporadically.
The NHS recommends combining exercise with a reduced-calorie diet for sustainable weight management uk. Our free BMI calculator can help you track where you stand, and our progress tracker lets you log your gym achievements and weight changes over time.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — 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 — 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.
Prescription Weight Loss Options Available In The UK
For eligible adults, prescription weight loss medication may support gym efforts when combined with exercise and dietary changes. Three medications are licensed in the UK: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are GLP-1 receptor agonists (or dual agonists in Mounjaro's case) that help reduce appetite and support feeling fuller after meals.
Clinical trials show average weight loss of 14–21% of body weight when combined with lifestyle changes — but results vary individually. Access is through NHS weight loss medication nhs specialist services (with waiting lists varying by region) or private online prescribing following a clinical assessment. Try our GLP-1 weight loss calculator to estimate potential results at different doses if you're considering this option.
- 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.
Who is eligible for prescription weight loss medication in the UK?
Adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions (type 2 diabetes, hypertension, cardiovascular disease, sleep apnoea) may be eligible. Lower thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults due to higher health risks at lower BMI. Your GP can assess your eligibility.
How long before gym routine weight loss becomes noticeable?
Most people notice changes in energy and fitness within 2–4 weeks of consistent exercise, though visible weight changes typically take 4–8 weeks. Combining gym work with dietary calorie deficit and tracking with our progress tracker helps maintain motivation during this period.
Can I use prescription weight loss medication without going to the gym?
Prescription medications like Mounjaro and Wegovy are licensed for use alongside lifestyle changes — reduced-calorie diet and increased physical activity — not as replacements. Your prescriber will discuss realistic expectations and the importance of combining medication with exercise and healthy eating habits.
How do I access weight loss medication through the NHS?
Speak to your GP about referral to a tier 3 specialist weight management service. NHS access varies by region and may involve waiting lists. Alternatively, private online prescribing is available through UK-licensed prescribers following a clinical assessment — faster access but costs vary by dose and provider.
What's the best way to track progress alongside my gym routine?
Log your weight regularly (weekly or fortnightly), note changes in how clothes fit and energy levels, and track gym improvements (heavier weights, longer cardio sessions). Our free progress tracker on MyWeightCheck lets you record weight changes over time alongside your fitness goals — a practical way to see results beyond just the scales.
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.