Free Tool

Maffetone (MAF 180) for Running

Calculate running training zones using the Maffetone (MAF 180) method.

About Maffetone (MAF 180)

Dr. Phil Maffetone's MAF 180 formula (180 - age ± adjustments) provides a simple way to find your optimal aerobic training heart rate. The method emphasizes training at or below this heart rate to build aerobic base and fat-burning efficiency while avoiding overtraining.

Auto-Calculate from Your Data

Upload Strava, Garmin, or Intervals.icu exports to estimate your zones

Strava vs Garmin vs TrainingPeaks: Zone Differences

Different platforms calculate training zones differently. Here's what each expects:

Strava
Zone System 5-zone (% Max HR)
Algorithm % Max HR
Customizable No

Uses simple % of max HR. Zones are fixed percentages. Cannot customize.

Garmin
Zone System 5-zone (customizable)
Algorithm % Max HR or % HRR
Customizable Yes

Supports both %Max HR and %HRR (Heart Rate Reserve). Fully customizable zones.

TrainingPeaks
Zone System 5 or 7 zone
Algorithm % LTHR (Joe Friel)
Customizable Yes

Uses LTHR-based zones. Supports pace, HR, and power. Highly customizable.

Polar
Zone System 5-zone
Algorithm % Max HR or % HRR
Customizable Yes

Uses either method. Includes sport profiles with different zone settings.