674104
13
Zoom out
Zoom in
Previous page
1/38
Next page
Avoid wearing sunscreen, lotion, and insect repellent under
the device.
Avoid scratching the heart rate sensor on the back of the
device.
Wear the device above your wrist bone. The device should
be snug but comfortable.
Wait until the icon is solid before starting your activity.
Warm up for 5 to 10 minutes and get a heart rate reading
before starting your activity.
NOTE: In cold environments, warm up indoors.
Rinse the device with fresh water after each workout.
Viewing the Heart Rate Widget
The widget displays your current heart rate in beats per minute
(bpm) and a graph of your heart rate for the last 4 hours.
1
From the watch face, select DOWN.
2
Select START to view your average resting heart rate values
for the last 7 days.
Broadcasting Heart Rate Data to Garmin Devices
You can broadcast your heart rate data from your Forerunner
device and view it on paired Garmin devices.
NOTE: Broadcasting heart rate data decreases battery life.
1
From the heart rate widget, hold UP.
2
Select Options > Broadcast Heart Rate.
The Forerunner device starts broadcasting your heart rate
data, and appears.
NOTE: You can view only the heart rate widget while
broadcasting heart rate data from the heart rate widget.
3
Pair your Forerunner device with your Garmin ANT+
compatible device.
NOTE: The pairing instructions differ for each Garmin
compatible device. See your owner's manual.
TIP: To stop broadcasting your heart rate data, select any
key, and select Yes.
Broadcasting Heart Rate Data During an Activity
You can set up your Forerunner device to broadcast your heart
rate data automatically when you begin an activity. 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
From the heart rate widget, hold UP.
2
Select Options > Broadcast During Activity.
3
Begin an activity (Starting an Activity, page 2).
The Forerunner device starts broadcasting your heart rate
data in the background.
NOTE: There is no indication that the device is broadcasting
your heart rate data during an activity.
4
If necessary, pair your Forerunner device with your Garmin
ANT+ compatible device.
NOTE: The pairing instructions differ for each Garmin
compatible device. See your owner's manual.
TIP: To stop broadcasting your heart rate data, stop the
activity (Stopping an Activity, page 2).
Turning Off the Wrist Heart Rate Monitor
The default value for the Wrist Heart Rate setting is Auto. The
device automatically uses the wrist-based heart rate monitor
unless you pair an ANT+ heart rate monitor to the device.
1
From the heart rate widget, hold UP.
2
Select Options > Status > Off.
Running Dynamics
You can use your compatible Forerunner device paired with the
HRM-Run
accessory or other running dynamics accessory to
provide real-time feedback about your running form. If your
Forerunner device was packaged with the HRM-Run accessory,
the devices are already paired.
The running dynamics accessory has an accelerometer that
measures torso movement in order to calculate six running
metrics.
Cadence: Cadence is the number of steps per minute. It
displays the total steps (right and left combined).
Vertical oscillation: Vertical oscillation is your bounce while
running. It displays the vertical motion of your torso,
measured in centimeters.
Ground contact time: Ground contact time is the amount of
time in each step that you spend on the ground while
running. It is measured in milliseconds.
NOTE: Ground contact time and balance are not available
while walking.
Ground contact time balance: Ground contact time balance
displays the left/right balance of your ground contact time
while running. It displays a percentage. For example, 53.2
with an arrow pointing left or right.
Stride length: Stride length is the length of your stride from one
footfall to the next. It is measured in meters.
Vertical ratio: Vertical ratio is the ratio of vertical oscillation to
stride length. It displays a percentage. A lower number
typically indicates better running form.
Training with Running Dynamics
Before you can view running dynamics, you must put on the
HRM-Run accessory, HRM-Tri
accessory, or Running
Dynamics Pod, and pair it with your device (Pairing Your
Wireless Sensors, page 20).
If your Forerunner was packaged with the heart rate monitor, the
devices are already paired, and the Forerunner is set to display
running dynamics.
1
Select START, and select a running activity.
2
Select START.
3
Go for a run.
4
Scroll to the running dynamics screens to view your metrics.
Heart Rate Features 9
13


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Garmin Forerunner 645 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Garmin Forerunner 645 in the language / languages: English as an attachment in your email.

The manual is 3,28 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Garmin Forerunner 645

Garmin Forerunner 645 User Manual - German - 44 pages

Garmin Forerunner 645 User Manual - Dutch - 42 pages

Garmin Forerunner 645 User Manual - French - 44 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info