Understanding Your Heart Rate
Your heart rate, also known as pulse, is the number of times your heart beats per minute (BPM). It's a vital sign that indicates how well your cardiovascular system is functioning. Resting heart rate is typically between 60 and 100 BPM for adults, but can vary based on factors like age, fitness level, and medication.
During physical activity, your heart rate increases to deliver more oxygen to your muscles. The maximum heart rate you can safely achieve during exercise is an important metric for designing effective workout plans. A common formula to estimate maximum heart rate is 220 minus your age.
Heart rate zones are ranges of BPM that correspond to different exercise intensities. These zones help individuals train at appropriate levels for their goals, whether it's improving cardiovascular health, burning fat, or increasing endurance. Understanding these zones allows for more personalized and efficient training.
Your Heart Rate Information:
function calculateHeartRate() {
var age = document.getElementById("age").value;
var activityLevel = document.getElementById("activityLevel").value;
var restingHeartRate = document.getElementById("restingHeartRate").value;
var maxHeartRateResult = document.getElementById("maxHeartRate");
var heartRateZonesResult = document.getElementById("heartRateZones");
maxHeartRateResult.innerHTML = "";
heartRateZonesResult.innerHTML = "";
// Input validation
if (isNaN(age) || age 120) {
maxHeartRateResult.innerHTML = "Please enter a valid age.";
return;
}
if (isNaN(restingHeartRate) || restingHeartRate 250) {
maxHeartRateResult.innerHTML = "Please enter a valid resting heart rate.";
return;
}
// Calculate Maximum Heart Rate
var maxHR = 220 – age;
maxHeartRateResult.innerHTML = "
Estimated Maximum Heart Rate: " + maxHR + " BPM";
// Calculate Heart Rate Zones
var zone1_min = Math.round(maxHR * 0.5);
var zone1_max = Math.round(maxHR * 0.6);
var zone2_min = Math.round(maxHR * 0.61);
var zone2_max = Math.round(maxHR * 0.7);
var zone3_min = Math.round(maxHR * 0.71);
var zone3_max = Math.round(maxHR * 0.8);
var zone4_min = Math.round(maxHR * 0.81);
var zone4_max = Math.round(maxHR * 0.9);
var zone5_min = Math.round(maxHR * 0.91);
var zone5_max = Math.round(maxHR * 1);
var zonesHtml = "
Heart Rate Training Zones:
";
zonesHtml += "
Zone 1 (Very Light): " + zone1_min + " – " + zone1_max + " BPM";
zonesHtml += "
Zone 2 (Light): " + zone2_min + " – " + zone2_max + " BPM";
zonesHtml += "
Zone 3 (Moderate): " + zone3_min + " – " + zone3_max + " BPM";
zonesHtml += "
Zone 4 (Hard): " + zone4_min + " – " + zone4_max + " BPM";
zonesHtml += "
Zone 5 (Maximum): " + zone5_min + " – " + zone5_max + " BPM";
heartRateZonesResult.innerHTML = zonesHtml;
}
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max-width: 800px;
margin: 20px auto;
padding: 20px;
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margin-bottom: 8px;
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color: #333;
}