.calculator-container {
font-family: sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 20px;
border: 1px solid #e0e0e0;
border-radius: 8px;
background-color: #f9f9f9;
}
.calculator-title {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.form-group {
margin-bottom: 15px;
display: flex;
flex-direction: column;
}
.form-group label {
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.form-group input {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
}
.calculator-button {
width: 100%;
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-button:hover {
background-color: #0056b3;
}
.calculator-result {
margin-top: 20px;
padding: 15px;
border: 1px solid #d0d0d0;
border-radius: 4px;
background-color: #fff;
text-align: center;
font-size: 1.2rem;
color: #333;
min-height: 50px; /* To prevent layout shifts */
display: flex;
align-items: center;
justify-content: center;
}
function calculateCalorieBurn() {
var age = parseFloat(document.getElementById("age").value);
var weightKg = parseFloat(document.getElementById("weightKg").value);
var heartRate = parseFloat(document.getElementById("heartRate").value);
var durationMinutes = parseFloat(document.getElementById("durationMinutes").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(age) || isNaN(weightKg) || isNaN(heartRate) || isNaN(durationMinutes) ||
age <= 0 || weightKg <= 0 || heartRate <= 0 || durationMinutes <= 0) {
resultDiv.innerHTML = "Please enter valid positive numbers for all fields.";
return;
}
// Simplified MET (Metabolic Equivalent of Task) approximation based on heart rate zones.
// This is a very rough estimation as MET values are complex and vary by activity type.
// For more accuracy, specific activities should be selected.
// These MET values are illustrative and not scientifically precise for all cases.
var metValue = 0;
if (heartRate = 100 && heartRate = 130 && heartRate < 160) {
metValue = 7.0; // Vigorous activity
} else {
metValue = 9.0; // Very vigorous activity
}
// Calorie burn formula: Calories = MET * weight (kg) * duration (hours)
var durationHours = durationMinutes / 60;
var caloriesBurned = metValue * weightKg * durationHours;
resultDiv.innerHTML = "Estimated Calories Burned:
Understanding Heart Rate and Calorie Burn
Your heart rate is a crucial indicator of your body's response to physical activity. During exercise, your heart pumps faster to deliver oxygen and nutrients to your working muscles. This increased metabolic demand directly correlates with the number of calories you burn. A higher heart rate generally signifies a more intense workout, leading to a greater calorie expenditure.
Several factors influence how many calories you burn during a workout, including your age, weight, sex, fitness level, and the intensity and duration of the exercise. Our Heart Rate Calorie Burn Calculator provides an estimation based on your age, current weight, your average heart rate during the activity, and how long you performed the activity.
How it Works:
The calculator uses a simplified approach by estimating a Metabolic Equivalent of Task (MET) value based on your heart rate. METs represent the energy expenditure of an activity compared to resting metabolism.
- Low Heart Rate (e.g., < 100 bpm): Corresponds to light activities like a leisurely walk, burning fewer calories.
- Moderate Heart Rate (e.g., 100-130 bpm): Suggests moderate intensity, such as brisk walking or cycling, burning more calories.
- Vigorous Heart Rate (e.g., 130-160 bpm): Indicates higher intensity, like jogging or swimming laps, significantly increasing calorie burn.
- Very Vigorous Heart Rate (e.g., > 160 bpm): Represents high-intensity efforts, such as sprinting or interval training, leading to the highest calorie expenditure.
The formula used is a common approximation:
Calories Burned = METs × Body Weight (kg) × Duration (hours).
Important Note: This calculator provides an ESTIMATE. The actual number of calories burned can vary significantly. For a more accurate assessment, consider using a fitness tracker that measures your specific heart rate and accounts for various physiological factors, or consult with a fitness professional who can help you determine personalized calorie expenditure based on the specific type of exercise you are performing. Remember that consistency and overall activity levels are key to achieving your fitness goals.
.article-container {
font-family: sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 20px;
background-color: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
}
.article-title {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.article-container p {
line-height: 1.6;
color: #555;
margin-bottom: 15px;
}
.article-container ul {
margin-bottom: 15px;
padding-left: 20px;
}
.article-container li {
margin-bottom: 8px;
color: #555;
}