Medical Disclaimer
This Heart Rate Zone Calculator provides general fitness-related estimates only. It is not a substitute for medical advice. Individuals with heart conditions, high blood pressure, pregnancy, or other medical issues should consult a doctor before starting exercise or using heart-rate-based training.
The Heart Rate Zone Calculator helps you determine your ideal exercise intensity based on age and resting heart rate. It uses the well-known Karvonen Formula, which is more accurate than simple “220 − age” because it includes your personal heart rate reserve (HRR).
This calculator generates the five standard heart rate training zones:
- Zone 1 – Very Light (50–60%): Warm-ups, recovery sessions
- Zone 2 – Light (60–70%): Fat-burning, long steady cardio
- Zone 3 – Moderate (70–80%): Aerobic conditioning
- Zone 4 – Hard (80–90%): High-intensity endurance
- Zone 5 – Maximum (90–100%): Sprint training, peak performance
Training in the correct zone improves cardio fitness, performance, and fat loss while preventing overtraining. However, individuals with heart, lung, or blood pressure conditions should seek medical advice before intense exercise.
Heart Rate Zone Calculator
Zone 1 (50–60%): --- bpm
Zone 2 (60–70%): --- bpm
Zone 3 (70–80%): --- bpm
Zone 4 (80–90%): --- bpm
Zone 5 (90–100%): --- bpm
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