Heart Rate & Blood Pressure Analyzer
Blood Pressure Derived Metrics
"; outputHTML += "Mean Arterial Pressure (MAP): " + map.toFixed(1) + " mmHg"; outputHTML += "MAP is the average pressure in a patient's arteries during one cardiac cycle. A normal range is typically 70-100 mmHg."; outputHTML += "Pulse Pressure: " + pulsePressure.toFixed(0) + " mmHg"; outputHTML += "This is the difference between your upper and lower BP numbers. A normal pulse pressure is generally considered to be around 40 mmHg."; bpCalculated = true; } // 4. Heart Rate Zone Calculations (Karvonen Formula) // Validate HR/Age inputs if (!isNaN(age) && !isNaN(restingHR) && age > 0 && restingHR > 0) { // Max HR Estimate var maxHR = 220 – age; // Heart Rate Reserve (HRR) var heartRateReserve = maxHR – restingHR; // Karvonen Formula: Target HR = (HRR * intensity%) + Resting HR // Moderate Intensity (50% – 70%) var modLow = (heartRateReserve * 0.50) + restingHR; var modHigh = (heartRateReserve * 0.70) + restingHR; // Vigorous Intensity (70% – 85%) var vigLow = (heartRateReserve * 0.70) + restingHR; var vigHigh = (heartRateReserve * 0.85) + restingHR; outputHTML += "Target Heart Rate Zones (Karvonen Method)
"; outputHTML += "Estimated Maximum Heart Rate: " + maxHR + " bpm"; outputHTML += "Moderate Intensity Zone (50-70%): " + Math.round(modLow) + " bpm to " + Math.round(modHigh) + " bpm"; outputHTML += "Vigorous Intensity Zone (70-85%): " + Math.round(vigLow) + " bpm to " + Math.round(vigHigh) + " bpm"; outputHTML += "These zones are based on your age and resting heart rate for more personalized training targets."; hrCalculated = true; } // 5. Error Handling and Display var resultElement = document.getElementById('cardioResult'); if (bpCalculated || hrCalculated) { resultElement.innerHTML = outputHTML; } else { resultElement.innerHTML = "Please enter valid data. For BP metrics, ensure Systolic is higher than Diastolic. For HR zones, enter Age and Resting Heart Rate."; } }Understanding Your Cardiovascular Metrics
Monitoring your cardiovascular health goes beyond just looking at the raw numbers on a blood pressure cuff or a heart rate monitor. To truly understand your heart health and optimize your fitness routine, you need to look at derived metrics that offer deeper insights. This Heart Rate and Blood Pressure Calculator helps you compute these essential values.
Beyond the Cuff: Mean Arterial Pressure and Pulse Pressure
While your standard blood pressure reading (e.g., 120/80 mmHg) is vital, two other metrics provide a clearer picture of arterial health and organ perfusion:
- Mean Arterial Pressure (MAP): This is not simply the average of your systolic and diastolic pressures. Because your heart spends more time in diastole (relaxing) than systole (contracting), MAP is a weighted average. It represents the actual pressure driving blood to your vital organs. A MAP between 70 and 100 mmHg is generally considered sufficient to sustain organs.
- Pulse Pressure: This is the numeric difference between your systolic (top) and diastolic (bottom) numbers. For example, if your BP is 120/80, your pulse pressure is 40 mmHg. Generally, a pulse pressure greater than 60 mmHg can indicate stiffening of the arteries, particularly in older adults.
Training Smarter: The Karvonen Heart Rate Formula
To improve cardiovascular fitness safely and effectively, you need to train in the right "zones." While generic charts use only your age to guess your maximum heart rate, they ignore a crucial factor: your current fitness level.
This calculator uses the **Karvonen Method**, which incorporates your **Resting Heart Rate (RHR)**. Your RHR is a strong indicator of heart efficiency; lower is generally better. By using your age and RHR, the Karvonen formula calculates your "Heart Rate Reserve" to provide much more accurate target training zones:
- Moderate Intensity (50-70%): Ideal for fat burning, building endurance, and general cardiovascular health.
- Vigorous Intensity (70-85%): Used for improving aerobic capacity (VO2 max) and performance conditioning.
Disclaimer: This calculator is for informational and educational purposes only. The results are estimates based on standard formulas and should not be considered medical advice, diagnosis, or treatment. Always consult with a qualified healthcare professional regarding your blood pressure, heart rate, and before starting any new exercise program.