Heart Rate Features
25
Recovery heart rate is the difference between your
exercising heart rate and your heart rate two minutes after
the exercise has stopped. For example, after a typical
training run, you stop the timer. Your heart rate is 140 bpm.
After two minutes of no activity or cool down, your heart
rate is 90 bpm. Your recovery heart rate is 50 bpm (140
minus 90). Some studies have linked recovery heart rate to
cardiac health. Higher numbers generally indicate healthier
hearts.
TIP:
For best results, you should stop moving for two
minutes while the device calculates your recovery heart
rate value. You can save or discard the activity after this
value appears.
Pulse Oximeter
The Forerunner 745 device has a wrist-based pulse
oximeter to gauge the peripheral saturation of oxygen in
your blood. Knowing your oxygen saturation can help you
determine how your body is acclimating to high altitudes
for alpine sport and expedition.
You can manually begin a pulse oximeter reading by
viewing the pulse oximeter widget (
). You can also turn on
all-day readings (
Turning On All-Day Acclimation Mode, page
). When you remain motionless, your device analyzes
your oxygen saturation and your elevation. The elevation
profile helps indicate how your pulse oximeter readings are
changing, relative to your to elevation.
On the device, your pulse oximeter reading appears as an
oxygen saturation percentage and color on the
graph. On your Garmin Connect account, you can view
additional details about your pulse oximeter readings,
including trends over multiple days.
For more information about pulse oximeter accuracy, go to
Garmin.com.sg/legal/atdisclaimer
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 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
.
2
Select
Options
>
Pulse Ox Mode
>
During Sleep
.
Turning On All-Day Acclimation Mode
1
From the pulse oximeter widget, hold
.
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 acclimation mode
decreases battery life.
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 device reads your
blood oxygen saturation.
Wear the device above your wrist bone. The device
should be snug but comfortable.
Hold the arm wearing the device at heart level
while the device reads your blood oxygen
saturation.
Use a silicone band.
Clean and dry your arm before putting on the
device.
Avoid wearing sunscreen, lotion, and insect
repellent under the device.
1
The elevation scale.
2
A graph of your average oxygen saturation
readings for the last 24 hours.
3
Your most recent oxygen saturation reading.
4
The oxygen saturation percentage scale.
5
A graph of your elevation readings for the last 24
hours.
