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Heart Rate Features
The vívosmart device has a heart rate menu, enabling you to
view wrist-based heart rate data.
Monitors the saturation of oxygen in your blood. Knowing your
oxygen saturation can help you determine how your body is
adapting to exercise and stress.
NOTE: The pulse oximeter sensor is located on the back of the
device.
Displays your current VO2 max., which is an indication of athletic
performance and should increase as your level of fitness improves.
Broadcasts your current heart rate to a paired Garmin
®
device.
Pulse Oximeter
The vívosmart device has a wrist-based pulse oximeter to gauge
the saturation of oxygen in your blood. Knowing your oxygen
saturation can help you determine how your body is adapting to
exercise and stress. Your device 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 device, 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 (Activating Pulse Oximeter Sleep
Tracking, page 6). For more information on pulse oximeter
accuracy, go to garmin.com/ataccuracy.
Getting Pulse Oximeter Readings
You can manually begin a pulse oximeter reading on your
device at any time. The accuracy of these readings can vary
based on your blood flow, the device placement on your wrist,
and your stillness.
1
Wear the device above your wrist bone.
The device should be snug but comfortable.
2
Press to view the menu.
3
Select > .
4
Hold the arm wearing the device at heart level while the
device reads your blood oxygen saturation.
5
Keep still.
The device displays your oxygen saturation as a percentage.
NOTE: You can customize the pulse oximeter settings in your
Garmin Connect account (Activity Tracking Settings, page 8).
Activating Pulse Oximeter Sleep Tracking
You can set your device to continuously measure your blood
oxygen level, or SpO
2
, while you sleep (Tips for Erratic Pulse
Oximeter Data, page 11).
1
From the settings menu in the Garmin Connect Mobile app,
select Garmin Devices.
2
Select your device.
3
Select Activity Tracking > Pulse Ox.
4
Select Pulse Ox Sleep Tracking.
NOTE: Unusual sleep positions could cause abnormally low
sleep-time SpO
2
readings.
Setting an Abnormal Heart Rate Alert
You can set the device to alert you when your heart rate
exceeds a certain number of beats per minute (bpm) after a
period of inactivity. You can set the heart rate threshold in your
Garmin Connect account (Sound and Alert Settings, page 8).
1
Press to view the menu.
2
Select > > Abnormal Heart Rate Alerts.
3
Tap the screen once to enable the alert.
Each time you exceed the custom value, a message appears
and the device vibrates.
NOTE: You must enable the alert on your device and your
Garmin Connect account.
Broadcasting Heart Rate Data to Garmin Devices
You can broadcast your heart rate data from your vívosmart 4
device and view it on paired Garmin devices. For example, you
can broadcast your heart rate data to an Edge
®
device while
cycling, or to a VIRB action camera during an activity.
NOTE: Broadcasting heart rate data decreases battery life.
1
Press to view the menu.
2
Select > .
The vívosmart 4 device starts broadcasting your heart rate
data.
NOTE: You can swipe to view the time and date widget while
broadcasting heart rate data.
3
Pair your vívosmart 4 device with your Garmin ANT+
®
compatible device.
NOTE: The pairing instructions differ for each Garmin
compatible device. See your owner's manual.
4
Press to stop broadcasting your heart rate data.
About VO2 Max. Estimates
VO2 max. is the maximum volume of oxygen (in milliliters) you
can consume per minute per kilogram of body weight at your
maximum performance. In simple terms, VO2 max. is an
indication of athletic performance and should increase as your
level of fitness improves.
On the device, your VO2 max. estimate appears as a number
and description. On your Garmin Connect account, you can view
additional details about your VO2 max. estimate, including your
fitness age. Your fitness age gives you an idea of how your
fitness compares with a person of the same gender and different
age. As you exercise, your fitness age can decrease over time.
VO2 max. data is provided by FirstBeat. VO2 max. analysis is
provided with permission from The Cooper Institute
®
. For more
information, see the appendix (VO2 Max. Standard Ratings,
page 12), and go to www.CooperInstitute.org.
Getting Your VO2 Max. Estimate
The device requires wrist-based heart rate data and a timed 15
minute brisk walk or run to display your VO2 max. estimate.
1
Press to view the menu.
2
Select > .
If you have already recorded a 15 minute brisk walk or run,
your VO2 max. estimate may appear. The device updates
your VO2 max. estimate each time you complete a timed
walk or run.
3
Follow the on-screen instructions to get your VO2 max.
estimate.
A message appears when the test is complete.
4
To manually start a VO2 max. test to get an updated
estimate, tap your current reading and follow the instructions.
The device will update with your new VO2 max. estimate.
Garmin Connect
You can connect with your friends on your Garmin Connect
account. Garmin Connect gives you the tools to track, analyze,
6 Garmin Connect
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