Based on your max and resting heart rate, here is where your post-exercise rate falls.
Zone
Intensity
Heart Rate Range (BPM)
How to Calculate Your Heart Rate After Exercise
Monitoring your heart rate after exercise is one of the most effective ways to gauge your cardiovascular fitness and recovery capabilities. There are two critical metrics to measure immediately after your workout: your Peak Heart Rate (the moment you stop) and your Recovery Heart Rate (how much it drops after 1 or 2 minutes).
1. Measuring Your Pulse Manually
If you don't have a heart rate monitor or smartwatch, you can calculate your heart rate manually using the radial artery (wrist) or carotid artery (neck):
Stop exercising momentarily. Find your pulse immediately.
Place two fingers (index and middle) on your wrist below the thumb or on the side of your neck.
Count the beats for exactly 15 seconds.
Multiply by 4. This gives you your Beats Per Minute (BPM).
Example: If you count 40 beats in 15 seconds, your heart rate is 160 BPM.
2. Understanding Heart Rate Recovery (HRR)
Heart Rate Recovery is the difference between your heart rate at the end of exercise and your heart rate a specific amount of time later (usually 1 minute). A faster drop indicates a healthier heart and better physical conditioning.
The Formula: HRR = Peak Heart Rate - Heart Rate 1 Minute Later
General Benchmarks for 1-Minute Recovery:
< 12 BPM: Poor (Consult a doctor if consistently low)
12 – 20 BPM: Average
20 – 30 BPM: Good
30 – 40 BPM: Excellent
> 40 BPM: Athlete Level
3. Target Heart Rate Zones (The Karvonen Formula)
To ensure you are exercising effectively, you should aim for specific heart rate zones based on your age and resting heart rate. This calculator uses the Karvonen Formula, which is more accurate than the standard "220 minus age" because it accounts for your resting fitness level.
By tracking these numbers over time, you can watch your Resting Heart Rate decrease and your Recovery Rate increase, both signs that your heart is becoming more efficient.
function calculateHeartRate() {
// Get Inputs
var ageInput = document.getElementById('age');
var rhrInput = document.getElementById('rhr');
var peakInput = document.getElementById('peakHr');
var recoveryInput = document.getElementById('recoveryHr');
var age = parseFloat(ageInput.value);
var rhr = parseFloat(rhrInput.value);
var peakHr = parseFloat(peakInput.value);
var recoveryHr = parseFloat(recoveryInput.value);
// Validation
if (isNaN(age) || age 120) {
alert("Please enter a valid age.");
return;
}
// 1. Calculate Max Heart Rate (Tanaka formula is 208 – 0.7*age, but 220-age is standard for general calculators)
var mhr = 220 – age;
// Default RHR if not provided (assume average 70 for calculation purposes if missing, but simpler to use standard % if missing)
var hasRHR = !isNaN(rhr) && rhr > 30 && rhr < 120;
var safeRHR = hasRHR ? rhr : 0; // If using simple %, RHR acts as 0 offset
// 2. Calculate Recovery Score (if inputs exist)
var recoveryScore = 0;
var recoveryText = "N/A";
var recoveryClass = "";
if (!isNaN(peakHr) && !isNaN(recoveryHr)) {
recoveryScore = peakHr – recoveryHr;
// Interpretation
if (recoveryScore < 12) {
recoveryText = "Poor (<12)";
recoveryClass = "status-poor";
} else if (recoveryScore < 20) {
recoveryText = "Average (12-20)";
recoveryClass = "status-average";
} else if (recoveryScore < 30) {
recoveryText = "Good (20-30)";
recoveryClass = "status-good";
} else if (recoveryScore 40)";
recoveryClass = "status-excellent";
}
} else {
recoveryText = "Enter Peak & 1-min HR";
}
// 3. Generate Zones (Karvonen or Standard)
// Karvonen: Target = ((MHR – RHR) * %) + RHR
// Standard: Target = MHR * %
var zones = [
{ name: "Warm Up / Recovery", minPct: 0.50, maxPct: 0.60 },
{ name: "Fat Burning", minPct: 0.60, maxPct: 0.70 },
{ name: "Aerobic", minPct: 0.70, maxPct: 0.80 },
{ name: "Anaerobic", minPct: 0.80, maxPct: 0.90 },
{ name: "VO2 Max", minPct: 0.90, maxPct: 1.00 }
];
var tableHtml = "";
for (var i = 0; i < zones.length; i++) {
var z = zones[i];
var minRate, maxRate;
if (hasRHR) {
// Karvonen
minRate = Math.round(((mhr – safeRHR) * z.minPct) + safeRHR);
maxRate = Math.round(((mhr – safeRHR) * z.maxPct) + safeRHR);
} else {
// Standard
minRate = Math.round(mhr * z.minPct);
maxRate = Math.round(mhr * z.maxPct);
}
tableHtml += "