Find the Heart Rate Zones That Match Your Effort
Enter your age, and your resting heart rate if you know it, to get five zones in beats per minute and a plan for how to use them.
This tool was built by Serge (MSc) using the Tanaka formula for maximum heart rate and the Karvonen method for zones. My background is a lifelong natural lifter with over a decade of drug-free training and a science background (MSc).
My tools are for educational purposes and give practical guidance, not professional advice.
Most people either go too hard on easy days or never push on the days that matter. A heart rate zone gives each session a clear job, so you stop guessing how hard to work.
Add your resting heart rate for more personal zones, or leave it empty for a quick estimate from age alone.
Why I Pair Numbers With the Talk Test
I use heart rate zones together with the talk test, because a number on a wrist can drift with heat, caffeine, and a bad night of sleep. If I can speak in full sentences, I know I am in an easy zone, whatever the screen says.
I recommend doing the same. Treat the zones as a map and your breathing as the compass, and trust your body when the two disagree.
Where the Max Heart Rate Comes From
The old rule of 220 minus your age is simple, but it can be off by a lot for many people. This tool uses 208 minus 0.7 times your age, which came from a large review of studies and fits adults more closely.
It is still an estimate, and real maximums vary from person to person. If you have tested yours safely, enter it and the tool will use that number instead.
Using Zones Around Your Lifting
Easy cardio in zones one and two helps your heart and recovery without eating into your strength training. Hard efforts in zone four cost more, so keep them to a single session a week and place them away from your heaviest leg day.
Before any session, a few lighter sets get your body ready, and the warm-up set calculator shows you how to ramp up. On long or hot days, the water intake calculator helps you plan your drinking so your heart rate stays steady.
On Your Rest Days
Easy movement is where recovery happens, and zone one is about as gentle as exercise gets. A short stretching session fits well here, and my 10-Minute Morning Mobility Routine is a simple way to start the day loose.