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
Gym Workout Plan For Weight Loss And Toning
A gym workout plan is most effective for weight loss and toning when combined with a calorie deficit and, for eligible adults, prescription weight loss medication. In the UK, exercise forms part of a comprehensive weight management approach — whether you're working with your GP through NHS weight loss services or considering prescription options like Mounjaro or Wegovy. This guide explains how gym training supports your goals and what medication options are available if you need additional support.
10,000+ calculations today · NHS-aligned thresholds · 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/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.
Prescription Weight Loss Medication Available In The UK
If you're working towards weight loss and toning, prescription medications can support your efforts alongside gym workouts and calorie reduction. Three UK-licensed weight loss medications are available for eligible adults:
- Mounjaro (tirzepatide) — dual GIP and GLP-1 receptor agonist, once-weekly injection. Clinical trials showed average weight loss of 15–21% of body weight over 72 weeks alongside exercise and diet.
- Wegovy (semaglutide) — GLP-1 receptor agonist, once-weekly injection. STEP trial data showed approximately 15% average body weight loss over 68 weeks.
- Saxenda (liraglutide) — GLP-1 receptor agonist, once-daily injection. Licensed for weight management in UK adults with BMI 30 or above, or 27–29.9 with weight-related health conditions.
All three are prescription-only and require clinical assessment. Individual results vary. These medications work by reducing appetite and supporting feelings of fullness, which can help maintain the calorie deficit needed for weight loss. Try our free GLP-1 weight loss calculator above to see projected weight loss at different doses.
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.
NHS Eligibility And How To Access Weight Loss Support
In the UK, prescription weight loss medication is available through two routes. The NHS route involves referral to a tier 3 specialist weight management service from your GP — access varies by region and waiting times can be lengthy. The private route is available through GPhC-registered online prescribers following an online clinical assessment, with no NHS referral required.
To find out if you're eligible, check your BMI using our free BMI calculator above. Adults with a BMI of 30 or above, or 27–29.9 with conditions like type 2 diabetes, high blood pressure, or sleep apnoea, may qualify. Speak with your GP about nhs weight loss options in your area, or explore private prescribing if you prefer faster access. Either way, medication should always complement regular gym training and sustained dietary changes.
- 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.
Can I lose weight with just a gym workout plan without medication?
Yes — many people achieve weight loss through exercise, calorie deficit, and dietary changes alone. However, the rate of loss varies by individual, starting weight, and consistency. For eligible adults, prescription medication can accelerate progress and make a calorie deficit easier to maintain by reducing hunger and cravings.
What type of gym workout is best for weight loss and toning?
Combine resistance training (weights, bodyweight exercises) with cardiovascular activity. Resistance training preserves muscle during weight loss, which supports toning. Cardio creates additional calorie deficit. Aim for 150 minutes moderate cardio or 75 minutes vigorous cardio per week, plus 2+ days strength training, alongside a calorie-controlled diet.
How quickly will I see weight loss results from gym training?
Visible changes typically appear after 4–6 weeks of consistent training and calorie deficit. The NHS recommends losing 0.5–1 kg per week as a safe, sustainable rate. Weight loss medication can support faster, steadier loss when combined with exercise and dietary changes.
Are weight loss injections available on the NHS in the UK?
Yes — Mounjaro and Wegovy are approved for NHS use through specialist tier 3 weight management services. However, regional availability varies significantly and NHS waiting lists can be very long. Private prescribing offers faster access. Your GP can advise on NHS availability in your area.
Can I combine gym workouts with weight loss medication?
Yes — in fact, combining medication with exercise and a reduced-calorie diet gives the best results. Prescription medications support the calorie deficit by reducing appetite, while gym training preserves muscle, improves fitness, and accelerates toning. Always discuss your exercise plan with your prescriber to ensure it's safe for you.
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.