Your maximal heart rate (MHR) is the highest number of times your heart can beat in one minute during maximal physical exertion. It's a crucial metric for determining your target heart rate zones for exercise, which helps optimize training effectiveness and prevent overexertion. The most common and widely used formula for estimating MHR is the Tanaka formula.
Tanaka Formula: MHR = 208 – (0.7 * Age)
function calculateMaxHeartRate() {
var ageInput = document.getElementById("age");
var resultDiv = document.getElementById("result");
var age = parseFloat(ageInput.value);
if (isNaN(age) || age <= 0) {
resultDiv.innerHTML = "Please enter a valid age.";
return;
}
// Tanaka Formula: MHR = 208 – (0.7 * Age)
var maxHeartRate = 208 – (0.7 * age);
resultDiv.innerHTML = "Your estimated Maximal Heart Rate is: " + maxHeartRate.toFixed(0) + " bpm";
}