Forerunner ® 205/305 Owner’s Manual 5SettInGS4. Repeat step 3 for each zoneyou want to change.Setting Heart RateZonesNote: Heart rate zones are afeature of the Forerunner 305 only.A heart rate zone is simply acertain range of beats per minute.Heart rate zones are generallybased on a percentage of yourmaximum heart rate and arenumbered from 1 to 5 based onintensity (1–lowest, 5–highest).If you know your maximum heartrate, you can enter it and allowthe Forerunner to calculate yourheart rate zones automatically.You can also enter your heartrate zones manually. You can setheart rate zones for each sport.To base heart rate zones onyour maximum heart rate:1. From the Main Menu, selectSettings.2. Select a sport to set heartrate zones. Then select HRZones.3. Select the Zones field. Thenselect Based on Max.
