Heart Rate Target Calculator

Heart Rate Target Zone Calculator

Understanding your target heart rate zones is crucial for effective exercise. Whether you're aiming for improved cardiovascular health, fat burning, or athletic performance, training within specific heart rate ranges can optimize your results and minimize the risk of overexertion.

50% (Very Light/Recovery) 60% (Light/Fat Burning) 70% (Moderate/Aerobic Fitness) 80% (Hard/Anaerobic Threshold) 90% (Very Hard/Maximal Effort)

Understanding Heart Rate Training Zones

Your heart rate is a key indicator of exercise intensity. The Karvonen formula, or simpler estimations based on maximum heart rate, helps determine target zones.

  • Maximum Heart Rate (MHR): A common estimate is 220 minus your age. This represents the highest your heart rate can safely get during exercise.
  • Target Heart Rate Zone: This is a percentage of your MHR, indicating the intensity level.
  • Recovery Zone (50-60% of MHR): Ideal for active recovery, improving blood flow, and preparing for more intense workouts.
  • Fat Burning Zone (60-70% of MHR): Promotes fat utilization as an energy source, good for endurance and weight management.
  • Aerobic Zone (70-80% of MHR): Enhances cardiovascular fitness, endurance, and lung capacity.
  • Anaerobic Zone (80-90% of MHR): Improves speed and power, pushing your limits. This zone is typically for experienced athletes.
  • Maximal Effort Zone (90-100% of MHR): Very short bursts of intense activity, usually for elite athletes during specific training.

Always consult with a healthcare professional before starting any new exercise program, especially if you have pre-existing health conditions.

var calculateTargetHeartRate = function() { var ageInput = document.getElementById("age"); var intensitySelect = document.getElementById("intensity"); var resultDiv = document.getElementById("result"); var age = parseFloat(ageInput.value); var intensity = parseFloat(intensitySelect.value); if (isNaN(age) || age <= 0) { resultDiv.innerHTML = "Please enter a valid age."; return; } var maxHeartRate = 220 – age; var targetHeartRate = maxHeartRate * (intensity / 100); resultDiv.innerHTML = "Estimated Maximum Heart Rate: " + maxHeartRate.toFixed(0) + " bpm" + "Target Heart Rate Zone (" + intensity + "% of MHR): " + targetHeartRate.toFixed(0) + " bpm"; }; .calculator-container { font-family: sans-serif; max-width: 600px; margin: 20px auto; padding: 20px; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); } .calculator-container h2 { text-align: center; margin-bottom: 20px; color: #333; } .calculator-container h3 { margin-top: 30px; margin-bottom: 15px; color: #555; } .input-section { margin-bottom: 15px; display: flex; align-items: center; } .input-section label { display: inline-block; width: 150px; margin-right: 10px; font-weight: bold; color: #444; } .input-section input[type="number"], .input-section select { flex-grow: 1; padding: 8px; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; } button { display: block; width: 100%; padding: 10px; background-color: #007bff; color: white; border: none; border-radius: 4px; font-size: 1.1rem; cursor: pointer; transition: background-color 0.2s ease; margin-top: 20px; } button:hover { background-color: #0056b3; } #result { margin-top: 25px; padding: 15px; background-color: #e9ecef; border-radius: 4px; font-size: 1.1rem; color: #333; } #result p { margin: 5px 0; } .calculator-container ul { list-style-type: disc; padding-left: 20px; } .calculator-container li { margin-bottom: 8px; }

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