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
Workout Plan For Weight Loss In Gym
A structured workout plan is one of the most effective ways to support weight loss in the gym — but for many people in the UK, combining exercise with prescription weight management medication produces better results. Whether you're starting your fitness journey or looking to intensify your routine, understanding how gym workouts fit into a broader weight loss strategy — including nutrition and, if eligible, medication like Mounjaro or Wegovy — can help you achieve sustainable results. This guide covers practical gym approaches alongside UK prescription options available to eligible adults.
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.
Gym Workouts And Prescription Weight Loss In The UK
Exercise is crucial for weight loss, but combining gym workouts with prescription weight management medication can enhance results for eligible adults in the UK. Mounjaro (tirzepatide) and Wegovy (semaglutide) are GLP-1 based prescription injections licensed for weight management in UK adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions. Clinical trials show these medications, alongside reduced-calorie diet and increased physical activity, support average weight loss of 15–21% body weight. A typical effective gym plan combines resistance training (3 times weekly), cardiovascular exercise (150 minutes moderate intensity weekly), and flexibility work. Prescription weight loss medication is prescription-only and requires a clinical assessment from a qualified prescriber to determine eligibility. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different doses if you're exploring medication options.
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 vs Private: Finding Weight Loss Support In The UK
In the UK, prescription weight loss medication is available through two routes. NHS specialist tier 3 weight management services can prescribe Mounjaro and Wegovy, though availability and waiting lists vary significantly by region and integrated care board (ICB). Your GP can refer you to local specialist services, which typically include support with gym plans, nutrition advice, and behavioural strategies. Alternatively, private prescribing services offer faster access through a clinical online assessment. Whichever route you choose, combining medication with your gym routine maximises results. Our BMI calculator can help determine whether you may meet NHS eligibility criteria (BMI 30+, or 27–29.9 with weight-related conditions). Speak to your GP about what's available locally — they can discuss whether prescription weight loss medication suits your individual health needs and fitness goals.
- 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 in the gym without medication?
Yes — a structured gym plan with calorie deficit through diet and exercise alone can produce weight loss. The NHS recommends losing 0.5–1 kg per week through sustainable lifestyle changes. However, some people benefit from prescription weight loss medication alongside exercise if eligible, which can support greater average weight loss.
What type of gym workout is best for weight loss?
A combination of resistance training (3×weekly), cardiovascular exercise (150 minutes moderate intensity weekly), and flexibility work is most effective. Resistance training preserves muscle mass during weight loss, whilst cardio burns calories. A personal trainer or GP referral to a gym-based health programme can tailor a plan to your fitness level.
Am I eligible for prescription weight loss medication in the UK?
Adults with a BMI of 30 or above, or 27–29.9 with weight-related conditions (diabetes, high blood pressure, cardiovascular disease), may be eligible for Mounjaro or Wegovy. Your GP or a licensed prescriber can assess your individual eligibility following a clinical consultation. Use our BMI calculator to check your starting point.
How long does it take to see weight loss results from gym workouts?
Most people notice changes in energy, strength, and how clothes fit within 2–4 weeks. Measurable weight loss typically appears after 4–6 weeks of consistent exercise and calorie deficit. Combining gym work with prescription weight loss medication may accelerate results for eligible individuals.
Should I start medication or the gym plan first?
Both can begin together. Start your gym routine immediately whilst pursuing a GP assessment for medication eligibility if interested. Weight loss medication is most effective alongside increased physical activity and dietary changes — they work together, not as alternatives to each other.
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.