Target Heart Rate Calculator
Calculate your optimal heart rate zones for effective cardio training. Find your target heart rate for fat burning, endurance, and peak performance using scientifically proven formulas.
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Enter your age and resting heart rate, then click Calculate to see your target heart rate zones
What is Target Heart Rate?
Target heart rate is the optimal heart rate range you should maintain during exercise to achieve specific fitness goals. It's calculated as a percentage of your maximum heart rate and helps you train at the right intensity for your objectives.
The calculator offers multiple scientifically-backed methods for calculating maximum heart rate and intensity zones:
Max Heart Rate Formulas:
- Haskell & Fox (1971): 220 - age (most common)
- Tanaka (2001): 208 - (0.7 × age) (more accurate)
- Nes (2013): 211 - (0.64 × age) (most recent)
Intensity Scales:
- Karvonen: Uses heart rate reserve (most accurate)
- Haskell & Fox: Simple percentage of MHR
- Borg Scale: 6-20 perceived exertion
- CR10 Scale: 0-10 perceived exertion
The Karvonen method is most accurate as it considers your resting heart rate: Target HR = ((Max HR - Resting HR) × Intensity %) + Resting HR
Heart Rate Training Zones
Very Light (50-60%)
Light activity for warm-up, cool-down, and recovery. Improves circulation and helps with active recovery.
Light (60-70%)
Aerobic base building. Burns fat efficiently and improves endurance. Can be maintained for long periods.
Moderate (70-80%)
Moderate intensity training. Improves cardiovascular fitness and aerobic capacity.
Hard (80-90%)
High-intensity training. Improves lactate threshold and anaerobic capacity. Used for interval training.
VO2 Max (90-100%)
Maximum effort training. Develops power and speed. Should be used sparingly and with caution.
Frequently Asked Questions
What's the difference between Karvonen and Simple percentage methods?
The Karvonen method is more accurate because it considers your resting heart rate, providing personalized zones. The simple percentage method uses only your maximum heart rate (220 - age), which can be less accurate for individuals with high or low resting heart rates.
How do I find my resting heart rate?
Measure your heart rate first thing in the morning before getting out of bed. Count your pulse for 60 seconds or count for 15 seconds and multiply by 4. A normal resting heart rate is 60-100 bpm for adults, with athletes often having lower rates.
Which heart rate zone should I train in?
It depends on your goals: Zone 2 (60-70%) for fat burning and endurance, Zone 3 (70-80%) for general fitness, Zone 4 (80-90%) for performance improvement, and Zone 5 (90-100%) for maximum power development. Most training should be in Zones 2-3.
Is the 220 - age formula accurate?
The 220 - age formula is a general estimate that works reasonably well for most people, but it can be off by 10-20 bpm. Individual variations exist, so it's better to use the Karvonen method with your actual resting heart rate for more accurate results.
How often should I check my heart rate during exercise?
For steady-state cardio, check every 5-10 minutes. For interval training, monitor continuously or check at the end of each interval. Use a heart rate monitor for real-time feedback, especially when training in specific zones.
Can medications affect my heart rate zones?
Yes, certain medications (like beta-blockers) can lower your heart rate and affect your training zones. If you're on heart rate-affecting medications, consult your doctor before using heart rate-based training and consider using perceived exertion instead.
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