Garmin FORERUNNER 645, Owner'S Manual

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according to increasing intensity. Generally, heart rate zones are
calculated based on percentages of your maximum heart rate.
Setting Your Heart Rate Zones
The device 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 manually adjust your zones on the device or
using your Garmin Connect account.
1
Hold UP .
2
Select Settings > User Profile > Heart Rate .
3 Select Max. HR , and enter your maximum heart rate.
You can use the Auto Detect feature to automatically record
your maximum heart rate during an activity ( Detecting
Performance Measurements Automatically , page 11 ).
4 Select LTHR > Enter Manually , and enter your lactate
threshold heart rate.
You can perform a guided test to estimate your lactate
threshold ( Lactate Threshold , page 13 ). You can use the
Auto Detect feature to automatically record your lactate
threshold during an activity ( Detecting Performance
Measurements Automatically , page 11 ).
5 Select Resting HR , and enter your resting heart rate.
You can use the average resting heart rate measured by your
device, or you can set a custom resting heart rate.
6 Select Zones > Based On .
7 Select an option:
• Select
BPM to view and edit the zones in beats per
minute.
• Select %Max. HR to view and edit the zones as a
percentage of your maximum heart rate.
• Select %HRR to view and edit the zones as a percentage
of your heart rate reserve (maximum heart rate minus
resting heart rate).
• Select %LTHR to view and edit the zones as a percentage
of your lactate threshold heart rate.
8
Select a zone, and enter a value for each zone.
9
Select Add Sport Heart Rate , and select a sport profile to
add separate heart rate zones (optional).
10
Repeat steps 3 through 8 to add sport heart rate zones
(optional).
Letting the Device Set Your Heart Rate Zones
The default settings allow the device to detect your maximum
heart rate and set your heart rate zones as a percentage of your
maximum heart rate.
• Verify that your user profile settings are accurate (
Setting Up
Your User Profile , page 6 ).
• Run often with the wrist or chest heart rate monitor.
• Try a few heart rate training plans, available from your
Garmin Connect account.
• View your heart rate trends and time in zones using your
Garmin Connect account.
Heart Rate Zone Calculations
Zone % of
Maximum
Heart Rate
Perceived Exertion Benefits
1 50–60% Relaxed, easy pace,
rhythmic breathing Beginning-level
aerobic training,
reduces stress
2 60–70% Comfortable pace,
slightly deeper
breathing, conversation
possible Basic cardiovascular
training, good
recovery pace
3 70–80% Moderate pace, more
difficult to hold
conversation Improved aerobic
capacity, optimal
cardiovascular training
4 80–90% Fast pace and a bit
uncomfortable, breathing
forceful Improved anaerobic
capacity and
threshold, improved
speed
5 90–100% Sprinting pace,
unsustainable for long
period of time, labored
breathing Anaerobic and
muscular endurance,
increased power
Activity Tracking
The activity tracking feature records your daily step count,
distance traveled, intensity minutes, floors climbed, calories
burned, and sleep statistics for each recorded day. Your calories
burned includes your base metabolism plus activity calories.
The number of steps taken during the day appears on the steps
widget. The step count is updated periodically.
For more information about activity tracking and fitness metric
accuracy, go to garmin.com/ataccuracy .
Auto Goal
Your device creates a daily step goal automatically, based on
your previous activity levels. As you move during the day, the
device shows your progress toward your daily goal
À
.
If you choose not to use the auto goal feature, you can set a
personalized step goal on your Garmin Connect account.
Using the Move Alert
Sitting for prolonged periods of time can trigger undesirable
metabolic state changes. The move alert reminds you to keep
moving. After one hour of inactivity, Move! and the red bar
appear. Additional segments appear after every 15 minutes of
inactivity. The device also beeps or vibrates if audible tones are
turned on ( System Settings , page 22 ).
Go for a short walk (at least a couple of minutes) to reset the
move alert.
Sleep Tracking
While you are sleeping, the device automatically detects your
sleep and monitors your movement during your normal sleep
hours. You can set your normal sleep hours in the user settings
on your Garmin Connect account. Sleep statistics include total
hours of sleep, sleep levels, and sleep movement. You can view
your sleep statistics on your Garmin Connect account.
Activity Tracking 7