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Getting Pulse Oximeter Readings
You can manually begin a pulse oximeter reading by
viewing the pulse oximeter widget. The widget displays
your most recent blood oxygen saturation percentage, a
graph of your hourly average readings for the last 24
hours, and a graph of your elevation for the last 24 hours.
NOTE: The first time you view the pulse oximeter widget,
the device must acquire satellite signals to determine
your elevation. You should go outside, and wait while the
device locates satellites.
1 While you are sitting or inactive, press UP or DOWN to
view the pulse oximeter widget.
2 Press START to view widget details and begin a pulse
oximeter reading.
3 Remain motionless for up to 30 seconds.
NOTE: If you are too active for the watch to get a
pulse oximeter reading, a message appears instead
of a percentage. You can check again after several
minutes of inactivity. For best results, hold the arm
wearing the device at heart level while the device reads
your blood oxygen saturation.
4 Press DOWN to view a graph of your pulse oximeter
readings for the last seven days.
Turning On All-Day Pulse Oximeter Readings
1 From the pulse oximeter widget, hold MENU.
2 Select Options > Pulse Ox Mode > All Day.
The device automatically analyzes your oxygen
saturation throughout the day, when you are not
moving.
NOTE: Turning on all-day mode decreases battery life.
Turning Off Automatic Pulse Oximeter Readings
1 From the pulse oximeter widget, hold MENU.
2 Select Options > Pulse Ox Mode > Off.
The device turns off automatic pulse oximeter
readings. The device begins a pulse oximeter reading
when you view the pulse oximeter widget.
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 MENU.
2 Select Options > Pulse Ox Mode > During Sleep.
Tips for Erratic Pulse Oximeter Data
If the pulse oximeter data is erratic or does not appear,
you can try these tips.
• Remain motionless while the watch reads your blood
oxygen saturation.
• Wear the watch above your wrist bone. The watch
should be snug but comfortable.
Training
• Hold the arm wearing the watch at heart level while the
watch reads your blood oxygen saturation.
• Use a silicone or nylon band.
• Clean and dry your arm before putting on the watch.
• Avoid wearing sunscreen, lotion, and insect repellent
under the watch.
• Avoid scratching the optical sensor on the back of the
watch.
• Rinse the watch with fresh water after each workout.
Training
Setting Up Your User Profile
You can update your gender, date of birth, height, weight,
wrist, heart rate zone, power zone, and Critical Swim
Speed (CSS) settings
(Recording a Critical Swim Speed
Test,
page 35). The watch uses this information to
calculate accurate training data.
1 Hold MENU.
2 Select User Profile.
3 Select an option.
Fitness Goals
Knowing your heart rate zones can help you measure and
improve your fitness by understanding and applying these
principles.
• Your heart rate is a good measure of exercise intensity.
• Training in certain heart rate zones can help you
improve cardiovascular capacity and strength.
If you know your maximum heart rate, you can use
the table
(Heart Rate Zone Calculations,
determine the best 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.
About Heart Rate Zones
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.
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
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