The Heart Rate Reserve (HRR) is the difference between your maximum heart rate and your resting heart rate. It represents the range of heartbeats available for exercise. HRR is often used to determine target heart rate zones for training, especially for individuals undergoing cardiac rehabilitation or those who want to exercise within a specific intensity level.
Understanding Heart Rate Reserve
Your Heart Rate Reserve (HRR) is a valuable metric that helps you understand the potential range for your heart rate during physical activity. It's calculated as follows:
HRR = Maximum Heart Rate – Resting Heart Rate
For example, if your estimated maximum heart rate is 190 beats per minute (bpm) and your resting heart rate is 60 bpm, your HRR would be:
HRR = 190 bpm – 60 bpm = 130 bpm
Using HRR for Target Heart Rate Zones
The HRR is particularly useful for setting target heart rate zones during exercise. You can calculate your target heart rate for different intensity levels by using a percentage of your HRR and adding it back to your resting heart rate.
Light Intensity (e.g., 30-40% of HRR): Good for warm-ups, cool-downs, and recovery.
Moderate Intensity (e.g., 50-70% of HRR): Beneficial for improving cardiovascular fitness and endurance.
Vigorous Intensity (e.g., 70-85% of HRR): Excellent for improving aerobic capacity and burning calories.
It's important to note that the estimated maximum heart rate (often calculated as 220 minus your age) is an approximation. For a more accurate assessment, especially if you have underlying health conditions, consult with a healthcare professional.
function calculateHRR() {
var maxHeartRateInput = document.getElementById("maxHeartRate");
var restingHeartRateInput = document.getElementById("restingHeartRate");
var resultDiv = document.getElementById("result");
var maxHeartRate = parseFloat(maxHeartRateInput.value);
var restingHeartRate = parseFloat(restingHeartRateInput.value);
if (isNaN(maxHeartRate) || isNaN(restingHeartRate)) {
resultDiv.innerHTML = "Please enter valid numbers for both heart rates.";
return;
}
if (maxHeartRate <= restingHeartRate) {
resultDiv.innerHTML = "Estimated Maximum Heart Rate must be greater than Resting Heart Rate.";
return;
}
var hrr = maxHeartRate – restingHeartRate;
resultDiv.innerHTML = "