1. What is Max Heart Rate?

Max Heart Rate (MHR) is the highest number of beats per minute your heart can achieve during maximum physical exertion. The formula MHR = 217 - 0.85 × age provides an estimate of this value based on age.

2. How Does the Calculator Work?

The calculator uses the Max Heart Rate equation:

Where:

• \( MHR \) — Max heart rate in beats per minute (bpm)
• \( age \) — Age in years

Explanation: The equation shows that max heart rate decreases with age at a rate of 0.85 bpm per year from a baseline of 217 bpm.

3. Importance of MHR Calculation

Details: Knowing your max heart rate helps determine appropriate exercise intensity levels and target heart rate zones for training.

4. Using the Calculator

Tips: Simply enter your age in years. The value must be valid (between 1-120 years).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this formula?
A: This formula provides a population estimate. Individual max heart rates may vary by ±10-20 bpm.

Q2: What's the difference between this and the 220-age formula?
A: This formula (217 - 0.85×age) is more recent and may be more accurate, especially for older adults.

Q3: Should I exercise at my max heart rate?
A: No, max heart rate is a theoretical maximum. Training zones are typically 50-85% of MHR.

Q4: Does fitness level affect max heart rate?
A: Surprisingly, no. Fitness affects how efficiently your heart works, not its maximum rate.

Q5: When should I measure my true max heart rate?
A: Only under medical supervision during a maximal exercise test, as reaching true max can be dangerous.