Understanding Target Heart Rate Zones
Your target heart rate zone is a range of heartbeats per minute (bpm) that represents the optimal intensity for cardiovascular exercise. Working within this zone helps you achieve specific fitness goals, whether it's improving endurance, burning fat, or enhancing aerobic capacity.
How it's Calculated:
The most common method to estimate your target heart rate zone involves two key steps:
- Estimate Maximum Heart Rate (MHR): The simplest formula is 220 minus your age. For example, if you are 30 years old, your estimated MHR is 220 – 30 = 190 bpm.
- Determine Target Heart Rate Zone: Your target heart rate zone is typically between 50% and 85% of your MHR. The specific intensity you choose depends on your fitness level and goals.
Common Intensity Zones:
- 50-60% of MHR: Generally used for warm-ups, cool-downs, recovery, or for individuals who are new to exercise or have certain health conditions.
- 60-70% of MHR: Often referred to as the "fat-burning zone," this intensity is good for improving cardiovascular health and endurance.
- 70-85% of MHR: This is the aerobic zone, excellent for improving cardiovascular fitness and increasing stamina.
- Above 85% of MHR: This is considered vigorous or anaerobic exercise, suitable for highly fit individuals looking to improve performance.
Disclaimer: This calculator provides an estimate. It is always recommended to consult with a healthcare professional before starting any new exercise program, especially if you have any underlying health conditions.
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function calculateTargetHeartRate() {
var ageInput = document.getElementById("age");
var intensityInput = document.getElementById("intensity");
var resultDiv = document.getElementById("result");
var age = parseInt(ageInput.value);
var intensity = parseInt(intensityInput.value);
if (isNaN(age) || age 120) {
resultDiv.innerHTML = "Please enter a valid age.";
return;
}
if (isNaN(intensity) || intensity 100) {
resultDiv.innerHTML = "Please select a valid intensity percentage.";
return;
}
// Calculate Maximum Heart Rate (MHR)
var maxHeartRate = 220 – age;
// Calculate Target Heart Rate
var targetHeartRate = (maxHeartRate * intensity) / 100;
resultDiv.innerHTML = "Your target heart rate at " + intensity + "% intensity is approximately " + Math.round(targetHeartRate) + " bpm.";
}