Your maximum heart rate is the highest number of times your heart can beat per minute during maximal physical exertion. It's an important metric for understanding your fitness level and for designing effective exercise programs. While the widely used formula is a simple estimation, it's crucial to remember that individual variations exist, and factors like genetics, fitness level, and medications can influence your actual maximum heart rate. For a precise measurement, a supervised stress test by a medical professional is recommended.
function calculateMaxHeartRate() {
var ageInput = document.getElementById("age");
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
var age = parseFloat(ageInput.value);
if (isNaN(age) || age 120) {
resultDiv.innerHTML = "Please enter a valid age between 1 and 120.";
return;
}
// Simple maximum heart rate formula: 220 – age
var maxHeartRate = 220 – age;
resultDiv.innerHTML =
"Based on your age, your estimated maximum heart rate is: " +
maxHeartRate.toFixed(0) +
" beats per minute.";
}
#maxHeartRateCalculator {
font-family: Arial, sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
background-color: #f9f9f9;
}
#maxHeartRateCalculator h1 {
text-align: center;
color: #333;
margin-bottom: 15px;
}
#maxHeartRateCalculator p {
line-height: 1.6;
color: #555;
margin-bottom: 20px;
}
.calculator-inputs {
display: flex;
flex-direction: column;
align-items: center;
gap: 10px;
margin-bottom: 15px;
}
.calculator-inputs label {
font-weight: bold;
color: #444;
}
.calculator-inputs input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
width: 100px;
text-align: center;
}
.calculator-inputs button {
padding: 10px 15px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.3s ease;
}
.calculator-inputs button:hover {
background-color: #0056b3;
}
#result {
margin-top: 20px;
text-align: center;
font-size: 1.1em;
color: #333;
}
#result strong {
color: #007bff;
}