Heart Rate Zone Calculator

Training Zones Explained

• Zone 1 (50-60%): Very light — warm-up and recovery.
• Zone 2 (60-70%): Light — fat burning, base endurance.
• Zone 3 (70-80%): Moderate — aerobic fitness.
• Zone 4 (80-90%): Hard — anaerobic threshold.
• Zone 5 (90-100%): Maximum — peak performance, short bursts.

Consult a doctor before starting a new intense exercise program, especially if you have underlying health conditions.