Whether you're using the NHS, starting a fitness journey, or checking your BMI, this 2026 guide brings together official UK guidelines, practical tips, and trusted resources — all in one place.
Body Mass Index (BMI) is a simple measure using your weight and height. The NHS classifies adults into four main categories.
⚠️ BMI is a guide – it doesn't account for muscle mass, ethnicity, or age. Always combine with other health indicators.
| BMI range (kg/m²) | Category | Health risk (NHS) |
|---|---|---|
| Below 18.5 | Underweight | Increased risk – consult GP |
| 18.5 – 24.9 | Healthy weight | Lowest risk |
| 25 – 29.9 | Overweight | Moderate risk |
| 30 – 39.9 | Obese | Increased risk |
| 40 and above | Severely obese | High risk – seek support |
NHS‑approved 9‑week running plan for beginners. 3 runs per week, 30 mins each.
View planOver 65? NHS strength and balance exercises, 2 sessions per week recommended.
ExercisesBrisk walking: 10 minutes, 3 times a day. Free NHS Active 10 app.
Get appUK guidelines 2026: Adults should aim for at least 150 minutes moderate activity (or 75 minutes vigorous) per week, plus strength exercises twice a week.
The NHS 'Every Mind Matters' platform offers personalised mental health plans. In 2026, focus areas include:
If you're in crisis: call NHS 111 option 2, or Samaritans 116 123.
Hydration: 6‑8 cups/glasses of fluid per day (water, lower‑fat milk, sugar‑free drinks).
Alcohol: No more than 14 units per week, spread over 3+ days.
All guidelines verified against .gov.uk and NHS publications.
BMI categories, physical activity guidelines, screening ages.
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