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
Personal Training for Weight Loss — A Practical UK Guide
Personal training can be an effective tool for weight loss when combined with healthy eating and lifestyle changes. A qualified personal trainer helps create tailored fitness programmes, provides motivation, and ensures proper exercise technique — all important factors in sustainable weight management. However, weight loss requires a calorie deficit, which typically comes from both increased activity and dietary changes. Whether you're starting a new fitness journey or looking to optimise your current approach, understanding how exercise fits into your overall weight management plan is essential for UK adults aiming for healthy, lasting results.
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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 Personal Training Supports Weight Loss
Personal trainers design programmes tailored to your fitness level, goals, and any health conditions. This personalised approach is more effective than generic gym routines because it accounts for your individual circumstances and keeps you accountable.
Key benefits include:
- Progressive overload: Gradually increasing exercise intensity builds muscle, which boosts metabolic rate
- Adherence: Regular sessions with a trainer increase consistency — essential for weight loss success
- Proper technique: Correct form reduces injury risk and maximises calorie burn during exercise
- Motivation and support: A trainer provides encouragement during difficult weeks
The NHS recommends adults do at least 150 minutes of moderate aerobic activity per week, combined with strength training twice weekly. A personal trainer can help structure your week to meet these guidelines while working towards weight loss. The average calorie deficit needed for sustainable weight loss is around 500 kcal per day — personal training may contribute 200–400 kcal per session depending on intensity, meaning diet changes are also crucial.
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.
Combining Training with Overall Weight Management
Weight loss happens when you burn more calories than you consume — exercise alone rarely creates sufficient deficit without dietary changes. Use our free BMI calculator above to understand your current weight category and health baseline.
If you're interested in prescription weight management approaches, GLP-1 weight loss medications like Mounjaro or Wegovy work alongside lifestyle changes. These are prescription-only medicines requiring clinical assessment, and they're often combined with fitness and diet modifications for best results.
For sustainable weight management in the UK, consider a combined approach: structured personal training, NHS weight loss guidance, healthy eating, and if appropriate, prescription support. Our free progress tracker helps you log weight, fitness milestones, and lifestyle changes over time, making it easier to spot what's working and stay motivated through your journey.
- 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 much weight can I expect to lose with personal training?
Weight loss depends on calorie deficit, diet, and consistency. Personal training typically contributes 200–400 kcal per session, but sustainable weight loss (0.5–1 kg per week) requires dietary changes too. Individual results vary significantly based on starting weight, age, metabolism, and how closely you follow nutritional guidance alongside training.
How often should I do personal training for weight loss?
The NHS recommends 150 minutes of moderate activity plus strength training twice weekly. Most people benefit from 2–3 personal training sessions per week combined with additional independent exercise. Your trainer can design a schedule that fits your lifestyle and builds gradually to prevent injury.
Can personal training replace diet changes for weight loss?
No. Exercise alone rarely creates sufficient calorie deficit. Sustainable weight loss requires both increased activity and reduced calorie intake. Most successful weight loss involves a combination of fitness, nutrition, and behavioural changes — your personal trainer can support the exercise component while a nutritionist or GP advises on diet.
Is personal training safe for all fitness levels?
Yes, when working with a qualified trainer. Reputable personal trainers assess your fitness level, medical history, and any injuries before designing your programme. Inform your trainer about any health conditions or medications. If you have concerns, discuss with your GP before starting a new fitness plan.
What's the difference between personal training and GLP-1 weight loss medication?
Personal training is exercise-based and requires active effort. GLP-1 medications like Wegovy are prescription-only injections that support appetite regulation alongside lifestyle changes. Many people use both — our GLP-1 weight loss calculator can estimate potential weight loss with medication, while personal training optimises your fitness results for comprehensive weight management.
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.