User Manual

Heart Rate Features 21
on your device at any time. The accuracy of the
reading 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 Select UP or DOWN to view the pulse ox widget.
3 Select START.
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.
Turning On Pulse Oximeter Sleep Tracking
You can set your device to continuously measure your
blood oxygen saturation while you sleep.
NOTE: Unusual sleep positions can cause abnormally
low sleep-time SpO2 readings.
1 From the pulse oximeter widget, hold UP.
2 Select Sleep Pulse Ox > On.
Tips for Erratic Pulse Oximeter Data
If the pulse oximeter data is erratic or does not appear,
you can try these tips.
y Remain motionless while the device reads your
blood oxygen saturation.
y Wear the device above your wrist bone. The device
should be snug but comfortable.
y Hold the arm wearing the device at heart level
while the device reads your blood oxygen
saturation.
y Use a silicone band.
y Clean and dry your arm before putting on the
device.
y Avoid wearing sunscreen, lotion, and insect
repellent under the device.
y Avoid scratching the optical sensor on the back of
the device.
y Rinse the device with fresh water after each
workout.
Heart Rate Variability and Stress Level
Stress level is the result of a three-minute test
performed while standing still, where the Forerunner
device analyzes heart rate variability to determine your
overall stress. Training, sleep, nutrition, and general life
stress all impact how a runner performs. The stress
level range is from 1 to 100, where 1 is a very low
stress state and 100 is a very high stress state.
Knowing your stress level can help you decide if your
body is ready for a tough training run or yoga.
Using the Stress Level Widget
The stress level widget displays your current stress
level and a graph of your stress level for the last
several hours. It can also guide you through a
breathing activity to help you relax.
1 While you are sitting or inactive, select UP or
DOWN to view the stress level widget.
2 Select START.
• If your stress level is in the low or medium
range, a graph appears showing your stress
level for the last four hours.
TIP: To start a relaxation activity from the graph,
select DOWN > START, and enter a duration in
minutes.
• If your stress level is in the high range, a
message appears asking you to begin a
relaxation activity.
3 Select an option:
• View your stress level graph.
NOTE: Blue bars indicate periods of rest. Yellow
bars indicate periods of stress. Gray bars
indicate times when you were too active to
determine your stress level.
• Select Yes to start the relaxation activity, and
enter a duration in minutes.
• Select No to bypass the relaxation activity and
view the stress level graph.
Body Battery
Your device analyzes your heart rate variability, stress
level, sleep quality, and activity data to determine your
overall Body Battery level. Like a gas gauge on a car,
it indicates your amount of available reserve energy.
The Body Battery level range is from 0 to 100, where 0
to 25 is low reserve energy, 26 to 50 is medium reserve
energy, 51 to 75 is high reserve energy, and 76 to 100 is
very high reserve energy.
You can sync your device with your Garmin Connect
account to view your most up-to-date Body Battery
level, long-term trends, and additional details (Tips for
Improved Body Battery Data, page22).
Viewing the Body Battery Widget
The Body Battery widget displays your current Body
Battery level and a graph of your Body Battery level for
the last several hours.