How to Calculate Your Max Heart Rate

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Max Heart Rate Calculator

This calculator helps you estimate your maximum heart rate (MHR) using the most common formula.

function calculateMaxHeartRate() { var age = document.getElementById("age").value; var resultDiv = document.getElementById("result"); resultDiv.innerHTML = ""; // Clear previous result if (age === "" || isNaN(age)) { resultDiv.innerHTML = "Please enter a valid age."; return; } var ageNum = parseFloat(age); // The most common formula: 220 – age var maxHeartRate = 220 – ageNum; if (maxHeartRate < 0) { resultDiv.innerHTML = "Age cannot result in a negative heart rate. Please check your input."; return; } resultDiv.innerHTML = "Your estimated Maximum Heart Rate (MHR) is: " + maxHeartRate.toFixed(0) + " beats per minute (bpm)."; }

Understanding Maximum Heart Rate (MHR)

Your maximum heart rate (MHR) is the highest number of times your heart can realistically beat in one minute during maximal physical exertion. It's a crucial metric for understanding your fitness levels and designing effective training programs. Knowing your MHR helps you determine appropriate training zones, ensuring you work out at an intensity that is safe and beneficial for your goals.

The Most Common Formula:

The simplest and most widely used formula to estimate MHR is:

MHR = 220 – Age

This formula is a good starting point for most individuals, but it's important to remember that it's an estimate. Factors like genetics, fitness level, and even medication can influence your actual MHR.

How to Use This Calculator:

  1. Enter your current age in years into the provided field.
  2. Click the "Calculate Max Heart Rate" button.
  3. The calculator will provide an estimated MHR in beats per minute (bpm).

Example:

Let's say you are 35 years old. Using the formula:

MHR = 220 – 35 = 185 bpm

So, your estimated maximum heart rate is 185 beats per minute.

Important Considerations:

  • Accuracy: This formula is a general guideline. Your actual MHR can vary.
  • Fitness Level: Highly trained athletes might have a slightly different MHR than the estimated value.
  • Health Conditions: If you have any pre-existing health conditions, especially heart-related ones, consult with a medical professional before undertaking strenuous exercise or relying solely on these estimates.
  • Other Formulas: While 220-Age is common, other formulas exist (e.g., Tanaka: 208 – 0.7 x Age; Gellish: 207 – 0.7 x Age). These might offer slightly different estimations.

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