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 Plan at Gym: A UK Guide
A structured weight loss workout plan at the gym is one of the most effective ways to lose weight sustainably. Combined with a reduced-calorie diet and, where appropriate, prescription weight loss medication, regular gym exercise can accelerate fat loss and improve cardiovascular health. This guide covers evidence-based gym routines designed for weight management in the UK, plus how to combine exercise with other weight loss methods like GLP-1 injections for optimal 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.
Building an Effective Gym Routine for Weight Loss
An effective weight loss workout plan at the gym should combine cardiovascular exercise, resistance training, and consistency. The NHS recommends at least 150 minutes of moderate-intensity aerobic activity per week, alongside two sessions of muscle-strengthening exercises.
- Cardio work: Running, cycling, rowing, or elliptical for 30–45 minutes, 3–4 times weekly, burns significant calories and improves heart health
- Resistance training: Weight lifting or bodyweight exercises for 20–30 minutes, 2–3 times weekly, builds muscle mass and increases resting metabolic rate — meaning you burn more calories at rest
- Progressive overload: Gradually increase weight, reps, or intensity each week to prevent plateaus and maintain calorie burn
- Consistency matters more than intensity: A sustainable routine you can maintain for months beats intense bursts followed by inactivity
Start with a beginner-friendly split: three full-body sessions per week combining light weights and moderate cardio, then progress to more advanced routines as fitness improves.
Clinically BackedWeight Loss
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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 Gym Exercise with Weight Loss Medication
For faster, sustainable weight loss, combining gym workouts with prescription weight loss medication can be highly effective. GLP-1 medications like Wegovy (semaglutide) work by reducing appetite and helping you feel fuller on smaller portions — meaning calorie restriction becomes easier to maintain while exercising.
If you're interested in prescription weight loss options in the UK, eligibility starts at BMI 30 or above (or BMI 27+ with weight-related health conditions). Medications are available through NHS specialist services or private online prescribing. Exercise performance and motivation often improve once appetite is better controlled, making your gym routine more sustainable.
Use our free GLP-1 weight loss calculator to estimate potential results when combining exercise with medication, and track your progress using our progress tracker alongside your gym routine.
Sample Weekly Gym Schedule for Weight ManagementMonday: 30 mins moderate cardio (running/cycling) + 20 mins upper body weights. Wednesday: 35 mins cardio interval training + 20 mins lower body strength. Friday: 25 mins mixed cardio + 25 mins full-body resistance work. Weekends: Optional 30–40 min walk or light activity for active recovery.
This schedule totals approximately 180 minutes of cardio and 65 minutes of resistance work weekly — exceeding NHS recommendations. Adjust intensity based on fitness level. Start lighter and progress gradually. Rest days are crucial for recovery and preventing burnout.
- 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 lose with a gym workout plan?
Weight loss depends on diet, genetics, medication use, and consistency. Combined with a reduced-calorie diet, regular gym exercise typically results in 0.5–1 kg per week loss (NHS recommendation). Adding prescription weight loss medication may accelerate results. Use our free BMI calculator to check your starting point and set realistic targets with your GP.
Should I do cardio or weights for weight loss?
Both are valuable. Cardio burns calories immediately during exercise. Resistance training builds muscle mass, which increases resting metabolic rate — meaning you burn more calories even at rest. Combining both in your weight loss workout plan is most effective for sustainable fat loss.
Can I lose weight at the gym without changing my diet?
Exercise alone is less effective than combining gym workouts with dietary changes. The NHS recommends a calorie deficit of approximately 500 kcal per day for sustainable 0.5 kg weekly loss — this requires both reduced food intake and increased activity. Diet and exercise work together for best results.
Is it better to do gym workouts before or after starting weight loss medication?
You can start gym routines at any time, but some people find motivation improves once on GLP-1 medication due to reduced hunger and better appetite control. Start gently and build up gradually. Your prescriber can advise on exercise timing relative to your medication dose increases.
How do I track weight loss progress beyond the bathroom scales?
Track body measurements (waist, chest, hips), how clothes fit, energy levels, and gym performance (lifting heavier weights or running faster). Our free progress tracker helps log weight and measurements weekly. Remember: muscle weighs more than fat, so scales alone don't tell the full story of body composition change.
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.