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
Can Spin Classes Help You Lose Weight?
Spin classes can be an effective part of a weight management strategy when combined with dietary changes and other lifestyle adjustments. Indoor cycling is a high-intensity cardiovascular workout that burns significant calories, typically 400–600 kcal per 45-minute session depending on intensity and body weight. However, weight loss ultimately depends on creating a calorie deficit through both exercise and nutrition. The NHS recommends combining increased physical activity with reduced-calorie eating for sustainable results. Use our free BMI calculator to understand your current weight category, and consider how spin fits into your broader weight management approach.
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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 Spin Classes Support Calorie Burn and Weight Loss
Spin classes are an excellent cardiovascular exercise that engages large muscle groups, particularly the legs, glutes, and core. A typical 45-minute class can burn 400–600 calories for an average UK adult, though this varies based on body weight, intensity, and fitness level. Heavier individuals typically burn more calories during the same workout. Spin also offers low-impact exercise, making it easier on joints than running, which appeals to people managing their weight who may have joint concerns.
For sustainable weight loss, the NHS recommends a calorie deficit of approximately 500 kcal per day to achieve roughly 0.5 kg weight loss per week. Spin alone cannot create this deficit — it must be combined with dietary changes. A typical person cannot exercise their way to weight loss without reducing calorie intake. The added cardiovascular benefit includes improved heart health, better blood sugar control, and reduced blood pressure, all important outcomes for weight management in the UK.
Try our free weight loss calculator to explore how different approaches, including prescription weight management options like GLP-1 medication, project onto your personal goals when combined with exercise.
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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 Spin with Dietary Changes and Medical Support
Exercise alone is rarely sufficient for significant weight loss. The most effective approach combines regular physical activity with a reduced-calorie diet aligned with NHS weight loss guidance. Spin classes work best as part of a structured weight management plan that includes consistent dietary changes and, where appropriate, professional support.
For individuals with a BMI in the overweight or obese range, prescription weight loss medication may be considered alongside exercise and diet. GLP-1 weight loss injections like Mounjaro and Wegovy are prescription-only medications available in the UK that support appetite regulation and can facilitate weight loss when combined with lifestyle changes — including exercise programmes like spin. Your GP can assess whether weight loss medication is appropriate for your individual circumstances. Use our GLP-1 weight loss calculator to explore potential outcomes, and combine results with your spin class routine for a comprehensive weight management strategy.
- 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 calories does a 45-minute spin class burn?
A typical 45-minute spin class burns 400–600 calories for an average UK adult, depending on body weight, intensity, and fitness level. Heavier individuals and those working at higher intensity burn more calories. This is a significant contribution to daily energy expenditure but must be combined with dietary changes to create the calorie deficit needed for weight loss.
Can spin classes alone help me lose weight?
Spin classes alone rarely result in significant weight loss without dietary changes. Weight loss requires a calorie deficit, which is best achieved by combining exercise with reduced-calorie eating. The NHS recommends both approaches together. Spin is excellent for cardiovascular health, muscle tone, and supporting your overall weight management plan, but diet is equally important.
How often should I do spin classes for weight loss?
The NHS recommends at least 150 minutes of moderate-intensity aerobic activity per week for health benefits. This could be approximately 3–4 spin classes weekly (45 minutes each). Combined with strength training 2× per week and dietary changes, this creates a sustainable weight management routine.
Is spin suitable if I'm overweight or obese?
Yes, spin is low-impact and joint-friendly, making it suitable for people managing excess weight. However, always consult your GP before starting a new exercise programme, particularly if you have existing health conditions. Start gradually and increase intensity as fitness improves. Combine spin with dietary changes for best results.
Can I use spin instead of prescription weight loss medication?
Spin is valuable for health and supports weight management, but prescription weight loss medication like GLP-1 injections works through a different mechanism — regulating appetite and food cravings. These approaches are complementary, not alternatives. Your GP can discuss whether medication is appropriate alongside your exercise routine.
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.