The UK Chief Medical Officers' Guidelines
| Type | Target | Examples |
|---|---|---|
| Moderate aerobic | 150–300 min/week | Brisk walking, cycling, swimming, dancing |
| Vigorous aerobic | 75–150 min/week | Running, HIIT, fast cycling, aerobics classes |
| Muscle strengthening | 2+ days/week | Resistance training, yoga, heavy gardening |
| Flexibility + balance (60+) | Incorporated daily | Tai chi, yoga, balance exercises — fall prevention |
Evidence-Based Health Benefits
| Condition | Benefit |
|---|---|
| Cardiovascular disease | 35% risk reduction |
| Type 2 diabetes | 50% risk reduction; 12% HbA1c reduction with exercise |
| Depression | ~45% symptom reduction — comparable to antidepressants |
| Colon cancer | 30–40% risk reduction |
| Dementia | 35% risk reduction |
| All-cause mortality | 31% reduction in inactive to moderately active (largest benefit at first step) |
| Musculoskeletal | Reduces back pain, arthritis, osteoporosis risk |
| Sleep | Reduces insomnia severity by 45% |
The Biggest Benefit Is Going From Zero to SomethingMoving from completely sedentary to 1–2 walks per week provides the largest mortality benefit. The marginal return diminishes at higher volumes. You don't need to run marathons — start where you are.
Zone 2 Training
Training at 60–70% of maximum heart rate (conversational pace — can speak but not sing) for 45–60 minutes develops mitochondrial efficiency and metabolic health. It's the foundation of longevity-focused exercise programmes.
How do I calculate my maximum heart rate?
Estimated maximum HR = 220 − age. For moderate intensity (Zone 2): aim for 60–70% of max. E.g., a 50-year-old: max HR ~170, Zone 2 target = 102–119 bpm. Wear a heart rate monitor for accuracy.
Is walking enough exercise?
Yes — for sedentary individuals, brisk walking (100+ steps/minute) for 150 minutes per week provides substantial health benefits. Adding hills or carrying a rucksack increases intensity. Walking 7,000–10,000 steps/day is associated with significantly reduced mortality.
Can I exercise with heart disease?
Yes — cardiac rehabilitation is evidence-based and recommended after heart attack, bypass surgery, and stent placement. Exercise actually strengthens the heart and significantly reduces readmission rates. Specialist guidance from cardiac rehab is essential initially.
What is HIIT?
High-intensity interval training — alternating short bursts of near-maximal effort (20–40 seconds) with rest periods. Time-efficient: 2–3 sessions of 20 minutes achieves cardiovascular benefits comparable to longer moderate exercise. Not suitable for everyone — build a base first.
Medical Disclaimer: This page is for general education only and does not replace professional medical advice. Always consult a qualified healthcare provider.