Your maximum heart rate is the highest number of times your heart can beat per minute during strenuous exercise. It's a crucial metric for understanding your cardiovascular fitness and designing effective training programs. While individual variations exist, several formulas can estimate your predicted maximum heart rate based on your age. The most common and widely accepted formula is the Tanaka formula (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 greater than 0.";
return;
}
// Tanaka Formula: 208 – (0.7 * Age)
var maxHeartRate = 208 – (0.7 * age);
resultDiv.innerHTML = "Your predicted maximum heart rate is: " + maxHeartRate.toFixed(0) + " beats per minute (bpm)";
}