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
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Best Gym Workout for Weight Loss
Effective weight loss requires a combination of exercise, dietary changes, and often professional support. While gym workouts are an important part of any weight management plan, they work best alongside a balanced diet and, if appropriate, prescription weight loss medication. The NHS recommends both cardiovascular exercise and strength training as part of a sustainable weight loss programme. This guide covers evidence-based gym strategies to support your weight loss journey 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 Exercises for Weight Loss
The most effective gym workouts for weight loss combine cardiovascular exercise with resistance training. Here's what the evidence supports:
- Cardiovascular exercise (cardio): Running, cycling, rowing, or elliptical training burns calories during the session and can help create the calorie deficit needed for weight loss. Aim for 150 minutes of moderate-intensity cardio per week, as recommended by the NHS.
- Resistance training: Weight training or bodyweight exercises build lean muscle mass. Muscle tissue burns more calories at rest than fat tissue, supporting long-term weight management. Include 2–3 sessions of resistance training per week.
- High-intensity interval training (HIIT): Short bursts of intense exercise followed by rest periods can boost calorie burn and improve cardiovascular fitness in shorter timeframes.
- Consistency: Regular gym attendance is more important than occasional intense sessions. Aim for 3–5 gym sessions per week for sustainable results.
For weight loss to occur, you'll need to combine gym workouts with a calorie deficit — typically 500 kcal per day creates a loss of around 0.5 kg per week, according to NHS guidance.
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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 Exercise with Weight Management Support
Gym workouts alone are unlikely to produce significant weight loss without dietary changes. The NHS recommends combining exercise with reduced-calorie eating for the best results. If you're struggling with weight management despite regular gym attendance, your GP can discuss additional support options, including prescription weight management medications like GLP-1 injections (such as Mounjaro or Wegovy), which may help reduce appetite and support weight loss alongside your gym routine.
Use our BMI calculator to check your current weight status, and our GLP-1 weight loss calculator to explore how medication combined with exercise might support your goals. Track your progress with our free progress tracker to monitor both weight and fitness improvements over time.
- 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 many times per week should I go to the gym for weight loss?
The NHS recommends 150 minutes of moderate-intensity aerobic exercise per week, which typically means 3–5 gym sessions. Combine this with 2–3 strength training sessions. Consistency matters more than intensity — regular, sustainable gym attendance produces better long-term results than occasional intense workouts.
What's the best time of day to exercise at the gym for weight loss?
The best time is whenever you can exercise consistently. Morning workouts may boost metabolism slightly, but the most important factor is adherence. Choose a time that fits your schedule so you can maintain regular gym attendance, as consistency is key to weight loss success.
Can I lose weight with gym exercise alone, without changing my diet?
Weight loss primarily requires a calorie deficit, which is difficult to achieve through exercise alone. A typical gym session burns 300–500 kcal, but this is easily offset by dietary choices. The NHS recommends combining regular exercise with a reduced-calorie diet for effective, sustainable weight loss.
What should I do if I'm not losing weight despite regular gym workouts?
If you're exercising regularly but not seeing results, discuss this with your GP. You may need dietary adjustments, or your GP can assess whether prescription weight loss support, such as GLP-1 medication, might help alongside your gym routine. Weight loss depends on multiple factors including metabolism, hormones, and overall energy balance.
Are gym workouts better than home exercise for weight loss?
Gym workouts and home exercise can be equally effective for weight loss — the key is consistency and intensity. Gyms offer equipment variety and a structured environment that some find motivating. Choose whichever setting you'll stick with long-term, as adherence matters more than location.
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.