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
Weight Loss Workout Routine at the Gym
A structured gym routine is one of the most effective tools for weight management alongside diet. Whether you're working to lose weight naturally, considering prescription weight loss medication, or both, regular exercise at the gym can accelerate your results, improve cardiovascular health, and help you maintain weight loss long-term. The NHS recommends at least 150 minutes of moderate-intensity aerobic activity per week for adults. This guide covers evidence-based workout routines designed for weight loss in a UK gym setting, how to combine exercise with other weight management approaches, and how to track your progress effectively.
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.
Building an Effective Weight Loss Gym Routine
An effective weight loss workout routine combines aerobic exercise, strength training, and consistency. The NHS and NICE guidelines recommend a mix of both cardio and resistance work for optimal results.
Aerobic exercise (cardio) burns calories during and after exercise. Aim for 150–300 minutes of moderate-intensity activity per week (brisk walking, running, cycling, rowing) or 75–150 minutes of vigorous-intensity activity (sprinting, high-intensity interval training). Strength training (weights, resistance machines) builds muscle, which increases your resting metabolic rate — meaning you burn more calories even at rest. Perform resistance exercises 2–3 times per week, targeting major muscle groups.
High-intensity interval training (HIIT) is particularly effective for weight loss: alternate 30 seconds of intense effort with 60–90 seconds of recovery. A typical HIIT session lasts 20–30 minutes and burns significant calories with less time commitment than steady-state cardio. Evidence shows HIIT improves insulin sensitivity and supports sustainable weight management in the UK health context.
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 Exercise With Weight Management and Medication
Weight loss is most effective when combining diet, exercise, and (where appropriate) prescription medication. If you're considering GLP-1 weight loss medication such as Mounjaro or Wegovy, exercise remains essential — these medications are designed to work alongside reduced-calorie diet and increased physical activity, not replace them.
Use our GLP-1 weight loss calculator to estimate potential weight loss at different doses if you're exploring prescription options. Our BMI calculator can help you assess your current weight status. Many people find that combining gym routines with structured weight management — whether through diet alone or alongside medication — produces the best long-term results. Consistency matters more than intensity: a sustainable routine you can stick with for months will always outperform a punishing short-term programme.
- 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 at least 150 minutes of moderate-intensity aerobic activity per week, plus 2–3 sessions of strength training. This could mean 4–5 gym visits weekly, or you could combine gym sessions with home workouts or outdoor activity. Consistency matters more than frequency — a realistic routine you'll maintain is better than an ambitious schedule you'll abandon.
Will gym exercise alone help me lose weight without changing my diet?
Exercise alone is less effective for weight loss than combining diet and activity. Weight loss requires a calorie deficit, which is primarily achieved through eating less. Exercise supports weight loss by burning calories, improving health markers, and helping maintain muscle during weight loss — but diet change is essential. Most successful weight loss programmes combine both approaches.
What's the best time of day to work out for weight loss?
The best time is whenever you'll exercise consistently. Morning workouts suit some people (higher adherence, metabolism boost), while evening routines work for others. What matters most for weight loss is total weekly activity volume, not timing. Choose a time that fits your schedule so you can maintain your routine long-term.
Can I combine gym exercise with weight loss medication like Mounjaro or Wegovy?
Yes — in fact, GLP-1 medications like Mounjaro and Wegovy are designed to work alongside reduced-calorie diet and increased physical activity. Exercise remains important even when taking prescription weight loss medication. Many people find the combination produces better results than either approach alone. Always consult your prescriber about exercise when starting any medication.
How long before I see weight loss results from gym workouts?
Most people notice modest weight changes within 2–4 weeks of consistent exercise combined with a calorie deficit, though visible body composition changes (muscle gain, fat loss) may take 6–8 weeks. Weight loss is gradual and varies between individuals — the NHS recommends losing 0.5–1 kg per week as a safe, sustainable rate. Use our free progress tracker to monitor changes over time.
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.