Heart-rate zones at age 58
At age 58, the Fox formula puts maximum heart rate at 162 bpm and the Tanaka formula at 167 bpm — a 5 bpm gap. This page shows the training zones both estimates produce, so you can see which chart you are actually following.
Open the heart-rate zone calculator
Get a quarterly nudge to re-check your numbers
Four emails a year: a reminder to re-take your numbers, and what changed in the guidance behind these tools. No spam, unsubscribe any time.
Double opt-in: you will get one confirmation email and nothing else until you click it.