Garmin Fenix 5 Sapphire Edition Owner's Manual

If you know your maximum heart rate, you can use the table 

heart rate zone for your fitness objectives.
If you do not know your maximum heart rate, use one of the 

calculators available on the Internet. Some gyms and health 

centers can provide a test that measures maximum heart rate. 

The default maximum heart rate is 220 minus your age.

Many athletes use heart rate zones to measure and increase 

their cardiovascular strength and improve their level of fitness. A 

heart rate zone is a set range of heartbeats per minute. The five 

commonly accepted heart rate zones are numbered from 1 to 5 

according to increasing intensity. Generally, heart rate zones are 

calculated based on percentages of your maximum heart rate.

The device uses your user profile information from the initial 

setup to determine your default heart rate zones. You can set 

separate heart rate zones for sport profiles, such as running, 

cycling, and swimming. For the most accurate calorie data 

during your activity, set your maximum heart rate. You can also 

set each heart rate zone and enter your resting heart rate 

manually. You can manually adjust your zones on the device or 

using your Garmin Connect account.

Hold MENU.

Select Settings > User Profile > Heart Rate.

Select Max. HR, and enter your maximum heart rate.
You can use the Auto Detection feature to automatically 

record your maximum heart rate during an activity 

).

Select LTHR > Enter Manually, and enter your lactate 

threshold heart rate.
You can perform a guided test to estimate your lactate 

threshold (

).

Select Resting HR, and enter your resting heart rate.
You can use the average resting heart rate based on your 

user profile information, or you can set a custom resting heart 

rate.

Select Zones > Based On.

Select an option:
• Select BPM to view and edit the zones in beats per 

minute.

• Select %Max. HR to view and edit the zones as a 

percentage of your maximum heart rate.

• Select %HRR to view and edit the zones as a percentage 

of your heart rate reserve (maximum heart rate minus 

resting heart rate).

• Select %LTHR to view and edit the zones as a percentage 

of your lactate threshold heart rate.

Select a zone, and enter a value for each zone.

Select Add Sport Heart Rate, and select a sport profile to 

add separate heart rate zones (optional).

Repeat steps 3 through 8 to add sport heart rate zones 

(optional).

The default settings allow the device to detect your maximum 

heart rate and set your heart rate zones as a percentage of your 

maximum heart rate.
• Verify that your user profile settings are accurate (

).

• Run often with the wrist or chest heart rate monitor.
• Try a few heart rate training plans, available from your 

Garmin Connect account.

• View your heart rate trends and time in zones using your 

Garmin Connect account.

1

50–60%

Relaxed, easy pace, 
rhythmic breathing

Beginning-level 
aerobic training, 
reduces stress

2

60–70%

Comfortable pace, 
slightly deeper 
breathing, conversation 
possible

Basic cardiovascular 
training, good 
recovery pace

3

70–80%

Moderate pace, more 
difficult to hold 
conversation

Improved aerobic 
capacity, optimal 
cardiovascular training

4

80–90%

Fast pace and a bit 
uncomfortable, breathing 
forceful

Improved anaerobic 
capacity and 
threshold, improved 
speed

5

90–100%

Sprinting pace, 
unsustainable for long 
period of time, labored 
breathing

Anaerobic and 
muscular endurance, 
increased power

A lifetime athlete is an individual who has trained intensely for 

many years (with the exception of minor injuries) and has a 

resting heart rate of 60 beats per minute (bpm) or less.

The values for the zones are default values and may not match 

your personal abilities. If you know your functional threshold 

power (FTP) value, you can enter it and allow the software to 

calculate your power zones automatically. You can manually 

adjust your zones on the device or using your Garmin Connect 

account.

Hold MENU.

Select Settings > User Profile > Power Zones > Based On.

Select an option:
• Select Watts to view and edit the zones in watts.
• Select % FTP to view and edit the zones as a percentage 

of your functional threshold power.

Select FTP, and enter your FTP value.

Select a zone, and enter a value for each zone.

If necessary, select Minimum, and enter a minimum power 

value.

The activity tracking feature records your daily step count, 

distance traveled, intensity minutes, floors climbed, calories 

burned, and sleep statistics for each recorded day. Your calories 

burned includes your base metabolism plus activity calories.
The number of steps taken during the day appears on the steps 

widget. The step count is updated periodically.

Your device creates a daily step goal automatically, based on 

your previous activity levels. As you move during the day, the 

device shows your progress toward your daily goal 

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Training

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