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Setting Your Heart Rate Zones
The watch 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 watch or using your
Garmin Connect account.
1 Press .
2 Select Settings > User Profile > Heart Rate.
3 Select Max. HR > 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.
4 Select Resting HR > Set Custom, and enter your resting heart rate.
You can use the average resting heart rate measured by your watch, or you can set a custom resting heart
rate.
5 Select Zones > Based On.
6 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).
7 Select a zone, and enter a value for each zone.
8 Select Sport Heart Rate, and select a sport profile to add separate heart rate zones (optional).
9 Repeat the steps to add sport heart rate zones (optional).
Heart Rate Zone Calculations
Zone
% of Maximum Heart
Rate
Perceived Exertion Benefits
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
Pulse Oximeter
The Approach S70 watch has a wrist-based pulse oximeter to gauge the saturation of oxygen in your blood.
Knowing your oxygen saturation can be valuable in understanding your overall health and help you determine
how your body is adapting to altitude. Your watch gauges your blood oxygen level by shining light into the skin
and checking how much light is absorbed. This is referred to as SpO
2
.
On the watch, your pulse oximeter readings appear as an SpO
2
percentage. On your Garmin Connect account,
you can view additional details about your pulse oximeter readings, including trends over multiple days. For
more information on pulse oximeter accuracy, go to garmin.com/ataccuracy.
30 Heart Rate Features
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