Suunto is committed to achieving Level AA conformance for this website in conformance with the Web Content Accessibility Guidelines (WCAG) 2.0 and achieving compliance with other accessibility standards. Please contact Customer Service at USA +1 855 258 0900 (toll free), if you have any issues accessing information on this website.

What are the default HR zones based on?

The default HR zones are based on common values you find in sports medicine literature.

As HR zones vary from person to person, we recommend you test and adjust the default zones. Read this article to learn more about aerobic and anaerobic thresholds, how these impact HR zones and how to define your personal heart rate zones.