USER MANUALCONTENTS
Contents

2

Introduction

8

Polar A370

8

USB cable

9

Polar Flow App

9Polar FlowSync Software

9

Polar Flow Web Service

9

Get started

10

Set up your A370

10

Choose one option for setup: computer or a compatible mobile device

10

Option A: set up with your computer

10

Option B: set up with polar flow app using your mobile device or tablet

11

Languages

12

Wristband

13

Menu structure

14

Activity

15

My day15

Training

15

Favorites15

My heart rate

15

Settings

162

Watch faces

16

Pairing

17

Pair a Heart Rate Sensor with A370

17

Settings

19

Settings menu

19

Display setting

19

Time of day setting

20

Restart A370

20

Reset A370

20

Firmware Update

21

With computer

21

With mobile device or tablet

21

Flight mode

21

Turn flight mode ON

22​Turn flight mode OFF

22

Time view icons

22

Training

23

How to wear your A370

23

Start a Training Session

24

Start a training session with a target

25

During training

25

Training views

25

Training with heart rate25

3

Training with a duration or calorie based training target

26

Training with a phased training target

28

Pause/Stop a training session

28

Training Summary

29

After Training

29

Training summary in A370

29

Polar Flow App

30

Polar Flow Web Service

31

Features32

24/7 Activity Tracking

32

Activity Goal

32

Activity data

32

Inactivity alert

33

Sleep information in the Flow web service and Flow app

33

Activity data in Flow App and Flow web service

34

GPS from mobile

34

Smart notifications

34

Using A370 as a Heart Rate Sensor Accessory

34

Polar Smart Coaching features

35

Activity Guide

35

Activity Guide on the A370

36

Activity Benefit

36

Continuous Heart Rate

37

4

Smart Calories

37

Heart Rate Zones

37

Polar Running Program

38

Create a Polar Running Program

38

Start a running target

38

Follow your progress

39

Weekly award

39

Polar Sleep PlusTM

39

Sleep data on your A370

39

Sleep data in the Flow app and web service

40

Polar Sport Profiles

40

Training Benefit

41

Fitness Test

42

Alarm

42

Polar Flow app and Web Service

43

Polar Flow App

43

Pair a Mobile Device with A370

43

Polar Flow Web Service

44

Feed

44

Explore

44

Diary

44

Progress

44

Community

44

5

Programs

45

Plan Your Training

45

Create a Training Target

45

Quick Target

45

Phased target

46

Favorites

46

Sync the Targets to your A370

46

Favorites47

Add a Training Target to Favorites:

47

Edit a Favorite

47

Remove a favorite

47

Polar Sport profiles in Flow Web Service

47

Add a Sport profile

48

Edit a Sport Profile

48

Syncing49

Sync with Flow mobile App

49

Sync With Flow Web Service Via FlowSync

49

Important Information

51

Taking Care of Your A370

51

Storing52

Service

52

Batteries

52

Charging A370 battery

52

6

Battery Operating Time54

Low Battery Notifications

54

Precautions

55

Interference During Training

55

Health and training

56

Warning - Keep batteries out of reach of children

57

How to use your Polar product securely

57

Technical Specification

57

A370

57

Polar FlowSync Software

58

Polar Flow mobile application compatibility

58

Water resistance of Polar products

59

Limited International Polar Guarantee

60

Disclaimer

61

7

INTRODUCTION
Congratulations on your new A370! Polar A370 is a sleek and sporty fitness tracker with continuous wristbased heart rate, advanced Sleep Plus sleep analysis and Polar’s trusted training features. Get an instant
overview of your daily activity on your A370 or with Polar Flow app. Together with the Polar Flow web service
and the Flow app your A370 helps you to understand how your choices and habits affect your well-being.
This user manual helps you get started with your new A370. To check the video tutorials and the latest versionof this user manual, go to support.polar.com/en/A370.

1. Touchscreen
2. Buttonll

To activate the display: press the button or turn your wrist when you're wearing the fitness tracker.
To change the watch face: tap and hold the display in time view, and swipe up or down. Then choose
one by tapping it.

POLAR A370
Polar A370 is a sleek and sporty fitness tracker that keeps you on the pulse by monitoring heart rate from thewrist 24/7. It tracks your daily steps, distance and calories burned, and keeps you connected with smart notifications from your phone. The advanced Polar Sleep Plus sleep analysis follows your sleeping patterns andgives you feedback on your sleep. Polar A370 helps you train smarter with Polar’s trusted training features,such as heart rate zones and Polar Running Program, and uses your phone’s GPS to track speed and distance during your outdoor workouts. You can even use Polar A370 as a heart rate sensor and connect yourheart rate to fitness apps or compatible Bluetooth devices, like Polar training devices, e.g. Polar M460. You
can buy additional wristbands separately.

8

USB CABLE
The product set includes a standard USB cable. You can use it for charging the battery and syncing data
between your A370 and Flow web service via FlowSync software.

POLAR FLOW APP
You can start using your A370 also with the Flow app and update your A370 wirelessly too. View your activity
and training data at a glance. Flow app syncs your activity and training data wirelessly to the Polar Flow web
service. Get it on the App StoreSM or Google playTM.

POLAR FLOWSYNC SOFTWARE
Polar FlowSync syncs your data between your A370 and the Polar Flow service on your computer. Go to flow.polar.com/start to start using your A370 and to download and install the FlowSync software.

POLAR FLOW WEB SERVICE
Plan your training, follow your achievements, get guidance and see detailed analysis of your activity and training results. Let all your friends know about your achievements. Find all this at flow.polar.com.

9

GET STARTEDSET UP YOUR A370
When you get hold of your new A370, it’s in storage mode. It wakes up when you plug it into a computer for
setup or a USB charger for charging. We recommend that you charge the battery before you start using yourA370. If the battery is completely empty, it takes a couple of minutes for the charging to start. See Batteries
for detailed information on charging the battery, battery operating times and low battery notifications.
CHOOSE ONE OPTION FOR SETUP: COMPUTER OR A COMPATIBLE MOBILE DEVICE
You can choose how to set up your A370, with a computer and a USB cable or wirelessly with a compatible
mobile device. Both methods require an Internet connection.
ll

Mobile setup is convenient if you don't have access to a computer with a USB port, but it might takelonger.
Wired setup is quicker and you can charge your A370 at the same time, but you need a USB cable andcomputer available.

OPTION A: SET UP WITH YOUR COMPUTER
1. Go to flow.polar.com/start and install the FlowSync software to set up your A370 and update the firmware if needed.
2. Push down the top part (A) of the USB cover inside the bracelet to access the micro USB port and plugin the supplied USB cable (B).
Don't charge the device when its USB port is wet. If the USB port of your A370 has gotten
wet, let it dry up before plugging in.

3. Plug the other end of the cable into the USB port of your computer for setup and charging the battery

10

(C).

4. Then we’ll walk you through signing up for the Polar Flow web service and personalizing your A370.
To get the most accurate and personalized activity and training data, it’s important that you’re precise with the physical settings when signing up for the web service. When signing up, you can choosea language and get the latest firmware for your A370.
When closing the USB cover, make sure it fits flush on the device.
After the setup is done, you’re ready to go. Have fun!
OPTION B: SET UP WITH POLAR FLOW APP USING YOUR MOBILE DEVICE OR TABLET
Polar A370 connects to the Polar Flow mobile app wirelessly via Bluetooth Smart, so remember to have it
turned on in your mobile device.
1. To make sure there’s enough charge in your A370 during the mobile setup, just plug the USB cable in a
powered USB port or a USB power adapter. Make sure that the adapter is marked with "output 5Vdc"
and that it provides a minimum of 500mA. The display begins to show an animated circle with
Bluetooth and USB icons.
Don't charge the device when its USB port is wet. If the USB port of your A370 has gotten
wet, let it dry up before plugging in.

11

2. Go to the App StoreSM or Google PlayTM on your mobile device and search and download the Polar
Flow app.
The mobile compatibility is available at support.polar.com.
3. When you open the Flow app it recognizes your new A370 nearby and prompts you to start pairing it.
Accept the pairing request and enter the Bluetooth pairing code from your A370 to the Flow app.
Make sure your A370 is powered up in order to make the connection possible.
4. Then create an account or sign in if you already have a Polar account. We’ll walk you through the signup and setup within the app. Tap Save and sync when you’ve defined all the settings. Your personalized settings will now be transferred to the bracelet.
To get the most accurate and personal activity and training data, it’s important that you’re precise withthe settings.
Please notice your A370 may get the latest firmware update during the wireless setup, anddepending on your connection it may take up to 20 minutes to complete. Your A370 will receive the language package according to your selection in the setup and it will also take some time.
5. A370 display will open to the time view once the synchronization is done.
You’re ready to go, have fun!

LANGUAGES
When you set up your A370, you can select one from the following languages to use it with:lEnglishl

SpanishlPortuguese12lFrenchlDanish

l

Dutch

l

Swedishl

NorwegianlGermanl

ItalianlFinnishl

Polishl

RussianlChinese (simplified)lJapaneselIndonesianlTurkish

l

Czech

l

KoreanAfter the setup you can change the language in the Flow app or in the web service.

WRISTBAND
The wristband of your A370 is easy to change. Very handy if you want to color coordinate with your outfit, forexample.
1. Bend the wristband from both sides, one side at a time, to detach it from the device.

13

2. Pull the device from the wristband.
To attach the wristband, perform the steps in the reverse order. Make sure the band fits flush with the device
on both sides.

MENU STRUCTURE
You can turn on the display by turning your wrist or press the button on the side.
Enter and browse through the menu by swiping the touch screen up or down. Select items by tapping theicons, and return with pressing the button on the side.

14

ACTIVITYYour daily activity goal is visualized in some of the watch faces and in the activity bar in My day menu. For
example, you can see your progress towards the goal how the clock numbers fill up with color in one.
For more information, see 24/7 Activity Tracking.

MY DAY
Here you'll see the progress of your daily activity goal in more detail, steps and calories and any training sessions you've done so far during the current day or any planned training sessions you've created in the Flow
web service. If you wear your A370 at night, you'll see your sleep information from the previous night. Also if
you have continuous HR on, you'll see your lowest recorded heart rate from the previous night and during the
day the lowest and the highest so far.
Tap each event in your day to see the it in more detail. To see what you have left to go to reach your daily activity goal, tap the activity data.

TRAINING
This is where you start your training sessions. Tap the icon to access the sport selection menu. You can edit
the selection in the Flow web service to keep your favorite sports more easily accessible on your A370. Go to
Flow, click your name and Sport profiles. Add or remove your favorite sports from there and remember tosync to get them on your device.
To start training, wait for your heart rate to appear next to a sport icon and tap the sport icon and the training
session begins.
If you want to have your location information of your outdoor training session, you need to have your phonewith you during the training session. Wait for the GPS icon to become static before starting the session. Seehere for more information.

FAVORITESIn Favorites you'll find training sessions you have saved as favorites in the Flow web service. If you've notsaved any favorites in Flow, this item is not in the A370 menu.
For more information, see Favorites.

MY HEART RATE
Here you can quicky check your current heart rate.

15

SETTINGS
In Settings you can toggle Continuous HR mode, Flight mode, Do not disturb mode and HR sensor mode on
and off, power the device down, reset Bluetooth connections and see device-specific information.

WATCH FACESTo change the watch face of your fitness tracker:
1. Tap and hold the touch display with your finger until you see a thumbnail menu of the watch faces:

2. Swipe up or down to see them all and tap the one you choose.
Here are the options:lVertical clock and datelActivity bar filling from left to rightl

Big clock with date and running secondslAvailable in several colors: tap and hold the touch display until you see a thumbnail ofthe big clock watch face. Tap the thumbnail, swipe up or down to see the available colors and tap the one you choose.

16lAnalog clock with datelDefault vertical clocklActivity shown with color filling up the numbers with the daily activity goal progresslHorizontal clock and date, no activity barl

The color changes with the time of day: yellow during the day and dark blue during thenight

Good choice for checking the time during night time.

PAIRING
Bluetooth® heart rate sensor has to be paired with your A370 for them to function together. Pairing takes only
a few seconds, and ensures that your A370 receives signals from only your sensors and devices, and allows
disturbance-free training in a group. Before entering an event or race, make sure that you do the pairing at
home to prevent interference from other devices.
Polar A370 fitness tracker is compatible with Polar Bluetooth® heart rate sensors H6, H7, H10 and OH1.

PAIR A HEART RATE SENSOR WITH A370
When using a Polar Bluetooth® heart rate sensor, A370 does not measure heart rate from the wrist.
There are two ways to pair a heart rate sensor with your A370:
1. Wear the heart rate sensor, and press and hold the button in time view until a message displays totouch the device with the A370.
2. Touch the heart rate sensor with your A370.
3. Pairing completed is shown when you're done.

17OR
1. Wear the heart rate sensor, tap Training on your A370.
2. Touch the heart rate sensor with your A370.
3. Pairing completed is shown when you're done.

18

SETTINGSSETTINGS MENU
You can access Settings from the main menu. Tap to turn icons green when their function is ON.

Continuous heart rate. Toggle off or on the continuous tracking of your HR.

Flight mode. Cuts off all wireless connections from the fitness tracker.

Do not disturb mode. Disables the display turning on from your wrist movement and blocks
Smart notifications from your phone.

HR sensor mode. Use your A370 as a heart rate sensor accessory with a HR receiving device.

Power off. Turn off the device.

Reset current Bluetooth connections. To use any Bluetooth accessories, you need to pair themagain with the device.

Information. See your device ID, firmware version, etc.

Press the side button to return to time view.

DISPLAY SETTING
You can choose on which hand you want to wear your A370 either in the Polar Flow web service or the Polar
Flow mobile app. The setting changes the orientation of the A370 display accordingly.
We recommend wearing the bracelet on your non-dominant hand to get the most accurate activity tracking results.
You can edit your settings any time in the Polar Flow web service and mobile app.
To change the display setting on your computer19

1. Plug in your A370 to your computer's USB port, go to flow.polar.com and sign in.
2. Go to Products and Settings.
3. Choose your A370, click and change the handedness.
The display orientation on your A370 will change on the next synchronization.
To change the display setting on the mobile app
1. Go to Devices.
2. Choose the desired wrist handedness for your A370.
The display orientation on your A370 will change on the next synchronization.

TIME OF DAY SETTING
The current time and its format are transferred to your A370 from your computer system clock when you sync
with the Polar Flow web service. To change the time, you'll first need to change the time zone on your computer and then sync your A370.
If you change the time or time zone on your mobile device and sync the Polar Flow app with the Polar Flow
web service and your A370, the time also changes on your A370. Your mobile device needs to have Internet
connection available in order to change the time.

RESTART A370
You can restart your A370 from the Settings menu. Touch the power icon
the side button to restart it.

to turn the device off. Press

RESET A370
If you experience problems with your A370, try resetting it. Resetting empties your A370 of all information andyou need to set it up again for your personal use.
Reset your A370 in FlowSync with your computer:1. Connect your A370 to the computer with the supplied USB cable.
2. Open settings in FlowSync.
3. Press the Factory Reset button.
You can also reset your A370 from the bracelet itself:20

1. Go to Settings in the main menu.

2. Tap the power icon

to turn the device off.

3. While the Turning off text is shown, press the button again for five seconds.
Now you need to set up your A370 again, either via mobile or computer. Just remember to use the same Polaraccount in the setup you've used before resetting.

FIRMWARE UPDATEWITH COMPUTER
You can update the firmware of your A370 yourself to keep it up to date. Whenever a new firmware version isavailable, FlowSync will notify you when you connect A370 to your computer. The firmware updates are downloaded via FlowSync.
Firmware updates are performed to improve the functionality of your A370. They can include improvements toexisting features, completely new features or bug fixes.
To update the firmware:
1. Plug your A370 to your computer with the USB cable.
2. FlowSync starts syncing your data.
3. After syncing, you are asked to update the firmware.
4. Choose Yes. New firmware is installed (this may take some time), and A370 restarts.
You won't lose any data due to the firmware update: Before the update begins, the data from your A370 issynced to the Flow web service.

WITH MOBILE DEVICE OR TABLET
You can also update the firmware with your mobile device if you're using Polar Flow mobile app to sync yourA370 training and activity data. The app will let you know if there's an update available and will guide you
through it. We recommend you plug in the A370 to a power source before starting the update to ensure flawless update operation.
The wireless firmware update may take up to 20 minutes, depending on your connection.

FLIGHT MODE
Flight mode cuts off all wireless communication from your A370. You can still use it, but you can't sync yourdata with the Polar Flow mobile app or use it with any wireless accessories.

21

TURN FLIGHT MODE ON
1. Go to Settings in the main menu.

2. Tap the airplane icon
, FLIGHT MODE ON is shown and the icon turns green. The airplaneicon appears in the time view.
​TURN FLIGHT MODE OFF
1. Go to Settings in the main menu.
2. Tap the icon and FLIGHT MODE OFF is shown.

TIME VIEW ICONSIn time view the following icons may be found beside the time and date.
Flight mode is on. All wireless connections to your mobile phone and accessories are disconnected.
Do not disturb mode is on. The display does not turn on from your wrist movement and you will notreceive smart notifications.
Vibrating alarm is set. You can set the alarm from the Flow app.
Your paired phone is disconnected and you have smart notifications turned on. Press and hold theside button to reconnect.

22

TRAINING
HOW TO WEAR YOUR A370
A370 continuously measures heart rate from the wrist, in everyday-wear and during exercises. To get accurate heart rate readings, find a comfortable fit for your wrist by following these tips.
In everyday-wear, secure the wrist band on top of your wrist, behind the wrist bone. Do NOT place the fitness
tracker on top of the wrist bone. The band can be slightly loose as long as the sensor on the back is touching
your skin and stays in place when you move.
Tighten the band a little bit when you start a training session, so the sensor will not move when you exercise.
The wrist band should not be uncomfortably tight either. Remember to loosen the wrist band after training for amore comfortable fit.

If you have tattoos on the skin of your wrist, avoid placing the sensor right on it as it may prevent accurate
readings.
Also it's a good idea to warm up the skin if your hands and skin get cold easily. Get the blood going before
starting your session!
In sports where it's more challenging to keep the sensor stationary on your wrist or where you have pressure
or movement in muscles or tendons near the sensor, we recommend using a Polar H10 heart rate sensor witha chest strap to get better measurement of your heart rate.
Follow your heart rate zones directly from your device and get guidance for training sessions you've planned in
the Flow web service.
Although there are many subjective clues as to how your body is doing during exercise (perceived exertion,breathing rate, physical sensations), none of them are as reliable as measuring heart rate. It is objective and isaffected by both internal and external factors - meaning you will have a dependable measure of your physicalstate.

23

START A TRAINING SESSION
In the time view, swipe the display up or down and tap Training to enter pre-training mode.

Choose the sport profile you want to use by swiping up or down.
Stay in the pre-training mode until the A370 has found your heart rate to make sure yourtraining data is accurate.

The heart icon begins to display your heart rate when it’s detected.

When you're wearing a Polar heart rate sensor that's paired with your A370, theA370 automatically uses the connected sensor to measure your heart rate during training
sessions. A blue circle around the heart rate symbol indicates that your A370 uses the connected sensor to measure your heart rate.
If you use your mobile's location, the GPS icon with static circle will show you

when the location is fixed and you can start tracking your training session.

Tap the chosen sport icon to start the session.

See Functions During Training for more information on what you can do with your A370 during training.

24

To pause a training session, press the button. Paused is displayed and the A370 goes to pause mode. To
continue your training session, tap the green arrows icon.
To stop a training session, press and hold the button during training recording or in pause mode until the session summary comes up. Or you can tap and hold the red stop icon for three seconds to end the recording.

START A TRAINING SESSION WITH A TARGET
You can plan your training and create detailed training targets in the Flow web service and sync them to yourA370 with Flowsync software or Flow app. Your A370 will guide you towards completing your target during
training.
To start a training session with a target:
1. Go to My day.
2. Choose the target from the list by tapping it.
3. Choose the sport you want to use by tapping its icon.
4. Training display comes up and you can start training.

DURING TRAINING
TRAINING VIEWS
You can activate the display by a wrist gesture and browse through training views by swiping the display up or
down. The display turns off automatically to save battery. You can set the display not to turn off by tappingand holding the touchscreen during training mode until you see a light bulb icon. To turn off this feature, tapand hold the touchscreen again until you see a light bulb off icon.
You can see the available training views below.
TRAINING WITH HEART RATEYour current heart rate in the color of the current heart rate zone.
The duration of your training session so far.

25

Time of day.
Calories burned so far during training.

Current speed or pace of the session. Modify the sport profiles in Flow to define which one
you want to see here.
Distance covered in the session so far.

You can also disable the heart rate sensor for your next session by tapping and holding a sport icon whilein the Training menu.
TRAINING WITH A DURATION OR CALORIE BASED TRAINING TARGET
If you have created a training target based on duration or calories in the Flow web service and synced it to yourA370, you have the following views:
If you've created a target based on calories, you can see how many calories of your target
you have left to burn and your current heart rate.

OR

If you've created a target based on time, you can see how much of your target you have stillto go to reach it and your current heart rate.

The color of the heart rate number shows in which heart rate zone you are.

26

The duration of your training session so far.
Time of day.

Calories burned so far during training.
Heart rate zones in vertical bars you've spent your session in. The current one is highlighted.

27

TRAINING WITH A PHASED TRAINING TARGET
If you have created a phased target in the Flow web service, defined the heart rate intensity for each phaseand synced the target to your A370, you have the following views:
You can see your heart rate, the lower and upper heart rate limit of the current phase and theduration of the training session so far. The heart symbol visualizes your current heart rate
between the heart rate limits.
The color of your heart rate shows the heart rate zone you are currently in.

The duration of your training session so far.
Time of day.

Calories burned so far during training.

PAUSE/STOP A TRAINING SESSION
1. To pause a training session, press the button. Paused is displayed. To continue your training session, tap the green arrows icon.

28

2. To stop a training session, press and hold the button for three seconds during training
recording or in pause mode until the counter hits zero. Or you can tap and hold the red stop
icon on the display.

If you stop your session after pausing, the time elapsed after pausing is not included in the total training
time.

TRAINING SUMMARY
AFTER TRAINING
You'll get a summary of your training session on your A370 right after you've stopped training. Get a moredetailed and illustrated analysis in the Flow app or in the Flow web service.

TRAINING SUMMARY IN A370
You can only view your training summary for the current day in A370. Go to My day and choose the training
session you want to view.
Start time
The time when your session started.
Duration
The duration of the session.
Average heart rateYour average heart rate during the session.
Maximum heart rateYour maximum heart rate during the session.

29

Training Benefit
The main effect / feedback of your session. To get Training Benefit, you'll need to havespent at least 10 minutes in Sport Zones with heart rate measurement on.

Heart rate zones
The percentage of training time spent in each heart rate zone.

Calories
Calories burned during the session.
Fat burn %The percentage of fat burning calories during the session.
Average and maximum speed or pace of the session.

Distance covered in the session.

POLAR FLOW APP
Sync your A370 with Flow app by pressing and holding the button in the time view. In Flow app you can analyze your data at a glance after each session. The app allows you to see a quick overview of your training data
offline.

30

For more information, see Polar Flow App.

POLAR FLOW WEB SERVICE
The Polar Flow web service allows you to analyze every detail of your training and learn more about your performance. Follow your progress and also share your best sessions with others.
For more information, see Polar Flow Web Service.

31

FEATURES
24/7 ACTIVITY TRACKING
A370 tracks your activity with an internal 3D accelerometer that records your wrist movements. It analyzes
the frequency, intensity and regularity of your movements together with your physical information, allowing
you to see how active you really are in your everyday life, on top of your regular training. We recommend towear you A370 on your non-dominant hand for more accurate activity tracking.

ACTIVITY GOAL
You'll get your personal activity goal when you register your Polar account in Flow. It guides you in reaching
the goal each day. You can view the goal on your A370 and in Polar Flow app or web service. The activity goalis based on your personal data and activity level setting, which you can find in the Daily Activity Goal settings
in the Flow web service.
If you want to change your goal, sign in to the Flow web service, click your name/profile photo in the upper
right corner and go to the Daily Activity goal tab in Settings. The Daily Activity goal setting lets you choose theone that best describes your typical day and activity from three activity levels. Below the selection area, you
can see how active you need to be to reach your daily activity goal on the chosen level. For example, if you're
an office worker and spend most of your day sitting, you would be expected to reach about four hours of low
intensity activity during an ordinary day. For people who stand and walk a lot during their working hours, theexpectations are higher.

ACTIVITY DATA
A370 gradually fills up an activity bar to indicate your progress towards your daily goal. When the bar isfull, you've reached your goal and you'll get a vibrating alert. You can view the activity bar in My day
menu and in some of the watch faces.
In the My day menu you can see how active your day has been so far along with any training sessions
you've done or planned for the day.
ll

Steps: Steps you've taken so far. The amount and type of body movements are registered andturned into an estimation of steps.
Calories: Shows how many calories you've burned through training, activity and BMR (Basal
metabolic rate: the minimum metabolic activity required to maintain life).

Note that your training session information is not included in the daily activity data. In other words, thesteps, the distance, the active time and the calories as well as the overall progress towards reaching yourdaily activity goal that are shown under the My day menu on your fitness tracker, and under Activity in the
Polar Flow mobile app and web service, represent all the other activity you perform during the day, in addition
to any recorded training session.

32

INACTIVITY ALERT
It's widely known that physical activity is a major factor in maintaining health. In addition to being physically
active, it's important to avoid prolonged sitting. Sitting for long periods of time is bad for your health, even on
those days when you train and gain enough daily activity. Your A370 spots if you’re being inactive for too long
during your day and this way helps you to break up your sitting to avoid the negative effects it has on yourhealth.
If you’ve been still for 55 minutes, you'll get an inactivity alert: It's time to move is shown along with a small
vibration. Stand up and find your own way to be active. Take a short walk, stretch, or do some other light activity. The message goes away when you start moving or press any button. If you don't get active in fiveminutes, you'll get an inactivity stamp, which you can see on the Flow app and Flow web service after
syncing.
Both Flow app and Flow web service will show you how many inactivity stamps you have received. This way
you can check back on your daily routine and make changes towards a more active life.

SLEEP INFORMATION IN THE FLOW WEB SERVICE AND FLOW APP
Polar devices with 24/7 activity measurement automatically detect when you fall asleep, when you’re sleeping and when you wake up from your wrist movements. They observe your movements during the night tracking all interruptions during your sleep span, and tell you how much time you actually spent asleep. The sleep
detection is based on recording the movements of your non-dominant hand with a digital 3D acceleration
sensor.
Tracking your sleep gives you an insight into your sleep patterns, allowing you to see where to make improvements or changes. Comparing your night to night averages and assessing your patterns can help you spot
what you’re doing during the day that can affect your sleep. Weekly summaries in your Polar Flow accounthelp you evaluate how regular your sleep-wake pattern is.
What Polar Sleep PlusTM Measures – Key Components of Sleep Tracking• Sleep time - Sleep time tells you the total duration between when you fell asleep and when you woke up.
Your Polar device observes your body movements and can detect when you fall asleep and wake up. It also
detects interruptions to your sleep during the entire Sleep time.
• Actual sleep - Actual sleep tells the time spent asleep between the time you fell asleep and when you woke
up. More specifically, it is your sleep time minus the interruptions. Only the time you actually spend asleep isincluded in actual sleep. Actual sleep can be presented as both percentage [%] and duration [h:min].
• Interruptions - During a normal night's sleep there are numerous short and long interruptions when you actually awaken from your sleep. Whether you remember these interruptions or not depends on their duration. The
shorter ones we don’t usually remember. The longer ones, for instance when one might get up for a sip ofwater, we can remember.

33

• Sleep continuity - Sleep continuity describes how continuous your sleep was. The continuity of your sleep isassessed on a scale of 1-5, where 5 reflects very continuous sleep. The lower the value the more fragmented
your sleep was. A good night's sleep consists of long uninterrupted sleep segments and does not contain interruptions at frequent intervals.
• Self-evaluation - In addition to showing objective sleep metrics the Flow service encourages you to self-evaluate your sleep daily. You can rate how well you’ve slept last night with a five-step scale: very poorly - poorly okay - well - very well. By answering this question, you get a longer version of textual feedback about yoursleep duration and quality.

ACTIVITY DATA IN FLOW APP AND FLOW WEB SERVICE
With the Flow app you can follow and analyze your activity data on the go and have your data synced wirelessly from your A370 to the Flow web service. The Flow web service gives you the most detailed insight into
your activity information.

GPS FROM MOBILE
You can track the routes, speed and distance of your outdoor training sessions with A370, using your mobile
device's GPS. You need Polar Flow mobile app installed in your mobile, paired with your A370 and give it permission to use your phone's location.
When you start your outdoor training session under Training, the GPS icon with static circle will show you
when the location is fixed and you can start tracking your training session.
You need to keep your mobile device with you during the training session.

SMART NOTIFICATIONSThe Smart Notifications feature allows you to get notifications from your phone to your Polar device. Your
Polar device notifies you if you get an incoming call or receive a message (for example an SMS or a WhatsApp message). It also notifies you about the calendar events you have on your phone's calendar. To use theSmart Notifications feature, you need to have the Polar Flow mobile app for iOS or Android, and your Polar
device needs to be paired with the app.
For detailed instructions on using Smart notifications, see the support document Smart Notifications (Android)
or Smart Notifications (iOS).

USING A370 AS A HEART RATE SENSOR ACCESSORY
You can use your A370 as a heart rate sensor with another Bluetooth device that can receive HR sensor profile, like a cycling computer, sporting app like Polar Beat or another wrist-worn device. To use it, first you needto pair the A370 with the receiving device just like another Bluetooth accessory. See the pairing instructions in
the receiving device's user guide.
To turn on the HR sensor mode:34

1. Go to Settings on the main menu.

2. Tap, accept the confirmation request to turn on the HR sensor mode

To turn off the HR sensor mode, press the back button and confirm your selection.
Note that this way the A370 does not record your training sessions to your Flow diary. Only if the HR
receiving device is Flow compatible will you get them in your diary.

POLAR SMART COACHING FEATURES
Whether it’s assessing your day-to-day fitness levels, creating individual training plans, working out at theright intensity or receiving instant feedback, Polar Smart Coaching offers a choice of unique, easy-to-use features, personalized to your needs and designed for maximum enjoyment and motivation when training.
A370 includes the following Polar Smart Coaching features:lActivity Guidel

Activity BenefitlContinuous Heart RatelHeart Rate Based TraininglRunning Programl

Sleep Plusl

Smart CalorieslSport ProfileslTraining Benefit

ACTIVITY GUIDEThe Activity Guide feature shows how active you've been during the day, and tells you how much you need tostill do to reach the recommendations for physical activity per day. You can check how you’re doing in reaching your activity goal for the day either from your A370, from the Polar Flow mobile app or from the Polar Flow
web service.
Note that your training session information is not included in the daily activity data. In other words, thesteps, the distance, the active time and the calories as well as the overall progress towards reaching yourdaily activity goal that are shown under the My day menu on your fitness tracker, and under Activity in the
Polar Flow mobile app and web service, represent all the other activity you perform during the day, in addition
to any recorded training session.

35

ACTIVITY GUIDE ON THE A370
Some of the watch faces on your A370 show your progress towards your daily activity goal.
Under My day menu item you can see Activity card that shows your Activity for the day in more detail. Hereyou can see the percentage of how much of your day's activity goal you've reached. The same is visualizedalso with an activity bar.
Tap the bar to see an example how to reach your goal for the day. 'Up' means low intensity, 'walking' means
medium intensity, and 'jogging' means high intensity activities. With practical guidance like '50 min walking' or'20 min jogging´, you can choose how to reach your goal. You'll find more examples for low, medium and highintensity activities at the Polar Flow web service and Polar Flow app.
For more information, see 24/7 Activity Tracking.

ACTIVITY BENEFIT
Activity benefit gives you feedback on the health benefits that being active has given you, and also on whatkind of unwanted effects sitting for too long has caused to your health. The feedback is based on internationalguidelines and research on the health effects of physical activity and sitting behavior. The core idea is: themore active you are, the more benefits you get!
Both the Flow app and Flow web service show the activity benefit of your daily activity. You can view theactivity benefit on daily, weekly and monthly basis. In the Flow web service, you can also view the detailed
information on health benefits.

For more information, see 24/7 Activity Tracking.

36

CONTINUOUS HEART RATEContinuous Heart Rate feature measures your heart rate around the clock. It enables more accurate measurement of daily calorie consumption and your overall activity because also physical activities with very little
wrist movement, such as cycling, can now be tracked.
The Continuous HR feature is automatically on in your A370. You can toggle between turning the Continuous
HR feature on and off on your A370 under Settings by tapping theicon. Polar’s Continuous HR feature
measures your heart rate in an intelligent, adaptable and optimized manner. Still, keeping the Continuous HR
feature on in your Polar device will drain the battery quicker.
Under My day you’ll be able to follow what will be the highest and lowest heart rate readings of your day andyou can check what your lowest heart rate reading was during the previous night. You can follow the readings
in more detail and in longer periods in Polar Flow, either in web or in the mobile app.
Polar’s Continuous Heart Rate tracking starts every few minutes or based on your wrist movements.
The timed measurement checks your heart rate every few minutes and if your heart rate is elevated during thecheck, the Continuous HR feature starts to track your heart rate. Continuous HR tracking can also start
based on your wrist movements, for example, when you’re walking with a fast enough pace for at least one
minute.
The continuous tracking of your heart rate stops automatically when your activity level drops low enough.
When your Polar device detects that you’ve been sitting for a long time, the Continuous HR tracking starts inorder to find the lowest heart rate reading of your day.

SMART CALORIESThe most accurate calorie counter on the market calculates the number of calories burned, with continuous
HR tracking it is even more accurate. The energy expenditure calculation is based on:lBody weight, height, age, genderl

Individual maximum heart rate (HRmax )lHeart rate during training and during continuous HR trackinglActivity measurement outside of training sessions and when you train without heart ratel

Individual maximal oxygen uptake (VO2max )VO2max tells about your aerobic fitness. You can find out your estimated VO2max with the Polar Fitness Test. Available only with Polar H7 and H10 heart rate sensors.

HEART RATE ZONES
The range between 50% and 100% of your maximum heart rate is divided into five heart rate zones. By keeping your heart rate within a certain heart rate zone you can easily control the intensity level of your workout.

37Each heart rate zone carries its own main benefits, and understanding these benefits will help you achieve theeffect you want from your workout.
Learn more about the Heart Rate Zones: What are Heart Rate Zones?.

POLAR RUNNING PROGRAM
Polar Running program is a personalized program based on your fitness level, designed to make sure that you
train right and avoid overreaching. It’s intelligent and adapts based on your development, and lets you know
when it might be a good idea to cut back a little and when to step it up a notch. Each program is tailored foryour event, taking your personal attributes, training background and preparation time into account. The program is free, and available in the Polar Flow web service at flow.polar.com.
Programs are available for 5k, 10k, half marathon and marathon events. Each program has three phases:
Base building, Build-up and Tapering. These phases are designed to gradually develop your performance, andmake sure you’re ready on race day. Running training sessions are divided into five types: easy jog, medium
run, long run, tempo run and interval. All sessions include warm-up, work, and cool-down phases for optimal
results. In addition, you can choose to do strength, core, and mobility exercises to support your development.
Each training week consists of two to five running sessions, and the total running training session duration per
week varies from one to seven hours depending on your fitness level. The minimum duration for a program is 9
weeks, and the maximum is 20 months.
Learn more about the Polar Running Program in this in-depth guide. Or read more about how to get started with
the Running Program.
CREATE A POLAR RUNNING PROGRAM
1. Log into the Flow web service at flow.polar.com.
2. Choose Programs from the Tab.
3. Choose your event, name it, set the event date, and when you wish to start the program.
4. Fill in the physical activity level questions.*
5. Choose if you want to include supporting exercises in the program.
6. Read and fill in the physical activity readiness questionnaire.
7. Review your program, and adjust any settings if necessary.
8. When you’re done, choose Start program.
*If four weeks of training history is available, these will be pre-filled.
START A RUNNING TARGET
After you've synced your A370 with Flow, your running target for the current day is automatically suggested to
you when you tap Training on your A370. Accept them to start your target.

38

FOLLOW YOUR PROGRESS
Sync your training results from your device to the Flow web service via the USB cable or Flow app. Follow
your progress from the Programs tab. You’ll see an overview of your current program, and how you’ve progressed.
Weekly award
If you're training for a running event using the Polar Running program, your A370 will award you for sticking to
your training plan.
You’ll receive award stars to your A370 as feedback based on how well you’ve followed the program eachweek. You'll get the award as the week changes, that is either on Monday, Saturday or Sunday, depending on
the First day of week setting you've chosen in your Polar account's General settings.
The number of stars you get depends on how well you've met your targets. Your actual time spent on the different heart rate zones during training is compared to the training target's planned time for each heart ratezone. Check the info below to see what is needed for each number of stars, or why you didn’t get any stars
some week.
l

1 Star: On average, you’ve met 75% of your target on each heart rate zone.

l

2 Stars: On average, you’ve met 90 % of your target on each heart rate zone.

l

3 Stars: On average, you’ve met 100 % of your target on each heart rate zone.

l

No stars: You’ve trained too much (more than 200%) on moderate zones (1 -3).

l

No stars: You’ve trained too much (more than 150%) on high intensity training zones (4 and 5).

Remember to start your training sessions using the training targets, so your training session results will
be compared to the targets.

POLAR SLEEP PLUSTM
The A370 tracks your sleep if you wear it at night. It detects when you fall asleep and when you wake up andcollects the data for deeper analysis in the Polar Flow app and web service. The A370 observes your hand
movement during the night to track all interruptions over the entire sleep span, and tells you how much time
you actually spent asleep.
Sleep data on your A370
You can check your sleep data from My day sleep card. Tap it to get detailed information.

39

l

l

Sleep time tells you the total duration between when you fell asleep
and when you woke up.
Actual sleep tells the time spent asleep between the time you fell
asleep and when you woke up. More specifically, it is your sleep timeminus the interruptions. Only the time you actually spend asleep isincluded in actual sleep.

lSleep continuity is a rating of how continuous your sleep time was.

l

The times you fell asleep and woke up.

ll

Feedback based on your sleep data, preferred sleep time and how you
rated your sleep.
Your given sleep rating with a smiley icon.

Sleep data in the Flow app and web service
Your sleep data is shown in the Flow app and web service after your A370 is synced. The Flow app and web
service show your sleep data in one night and week views. In the Flow web service, you can view your sleep
under the Sleep tab in your Diary. You can also include your sleep data to Activity reports under the Progress tab.
In the Polar Flow app and web service, you can set Your preferred sleep time to define how long you aim to
sleep every night. You can also rate your sleep. You will receive feedback on how you slept based on yoursleep data, your preferred sleep time and your sleep rating.
By following your sleep patterns you can see if they’re affected by any changes in your daily life and find theright balance between rest, daily activity and training.

POLAR SPORT PROFILES
We have created seven default sport profiles to your A370. In the Flow web service you can add new sport profiles and sync them to your A370, and this way create a list of all your favorite sports. You can also definesome specific settings for each sport profile. For example, set vibration feedback off in in the yoga sport profile. For more information, see Sport Profiles in Flow Web Service.
Using sport profiles makes it possible for you to keep up with what you've done and see the progress you've
made in different sports. You can do this in the Flow web service.
Please note that in a number of indoor sports, group sports and team sports profiles the HR visible to otherdevices setting is enabled by default. This means that compatible devices using Bluetooth Smart wirelesstechnology, e.g. gym equipment, can detect your heart rate. You can check which sport profiles haveBluetooth broadcasting enabled by default from the Polar Sport profiles list. You can enable or disable
Bluetooth broadcasting from sport profile settings.

40

TRAINING BENEFIT
Training Benefit gives you textual feedback on your performance for each training session helping you better
understand the effectiveness of your training. You can see the feedback in Flow app and Flow web service.
To get the feedback, you need to have trained at least a total of 10 minutes in the heart rate zones. Training
Benefit feedback is based on heart rate zones. It reads into how much time you spend and how many calories
you burn in each zone.
The descriptions of different training benefit options are listed in the table below
Feedback

Benefit

Maximum training+That was a hard session! You improved your sprint speed and thenervous system of your muscles, which make you more efficient.
This session also increased your resistance to fatigue.

Maximum training

That was a hard session! You improved your sprint speed and thenervous system of your muscles, which make you more efficient.

Maximum & Tempo training

What a session! You improved your speed and efficiency. Thissession also significantly developed your aerobic fitness and yourability to sustain high intensity effort for longer.

Tempo & Maximum training

What a session! You significantly improved your aerobic fitness
and your ability to sustain high intensity effort for longer. This session also developed your speed and efficiency.

Tempo training+

Great pace in a long session! You improved your aerobic fitness,
speed, and ability to sustain high intensity effort for longer. Thissession also increased your resistance to fatigue.

Tempo training

Great pace! You improved your aerobic fitness, speed, and ability
to sustain high intensity effort for longer.

Tempo & Steady state training

Good pace! You improved your ability to sustain high intensity
effort for longer. This session also developed your aerobic fitness
and the endurance of your muscles.

Steady state & Tempo training

Good pace! You improved your aerobic fitness and the enduranceof your muscles. This session also developed your ability to sustain high intensity effort for longer.

Steady state training +Excellent! This long session improved the endurance of yourmuscles and your aerobic fitness. It also increased your resistance to fatigue.

Steady state training

Excellent! You improved the endurance of your muscles and youraerobic fitness.

Steady state & Basic training, long

Excellent! This long session improved the endurance of yourmuscles and your aerobic fitness. It also developed your basic
endurance and your body's ability to burn fat during exercise.

41

FeedbackBenefit

Steady state & Basic training

Excellent! You improved the endurance of your muscles and youraerobic fitness. This session also developed your basic endurance
and your body's ability to burn fat during exercise.

Basic & Steady state training, long

Great! This long session improved your basic endurance and yourbody's ability to burn fat during exercise. It also developed theendurance of your muscles and your aerobic fitness.

Basic & Steady state training

Great! You improved your basic endurance and your body's ability
to burn fat during exercise. This session also developed the endurance of your muscles and your aerobic fitness.

Basic training, long

Great! This long, low intensity session improved your basic endurance and your body's ability to burn fat during exercise.

Basic training

Well done! This low intensity session improved your basic endurance and your body's ability to burn fat during exercise.

Recovery training

Very nice session for your recovery. Light exercise like this allows
your body to adapt to your training.

FITNESS TESTThe Polar Fitness Test is an easy, safe and quick way to estimate your aerobic (cardiovascular) fitness at
rest. The result, Polar OwnIndex, is comparable to maximal oxygen uptake (VO2max), which is commonlyused to evaluate aerobic fitness. Your long-term training background, heart rate, heart rate variability at rest,
gender, age, height, and body weight all influence OwnIndex. The Polar Fitness Test is developed for use byhealthy adults.
You need to wear a compatible Polar heart rate sensor (H6, H7, H9, H10) to perform the Fitness test.
When you're wearing a Polar heart rate sensor that's paired with your A370, the A370 automatically uses theconnected sensor to measure your heart rate during the test.
For instructions on performing the Polar Fitness test with A370, see the support document How do I perform
Fitness test and what is it used for?.

ALARM
The alarm in A370 is silent and vibrating. You can set an alarm only in the Polar Flow mobile app.
When the alarm is set on, a clock icon is displayed in the time view.
You can check the alarm time from My day by pulling the view upwards with your finger.

42

POLAR FLOW APP AND WEB SERVICEPOLAR FLOW APP
Polar Flow app allows you to see an instant visual interpretation of your activity and training data offline
whenever you want.
Get details of your 24/7 activity. Find out what you're missing from your daily goal and how to reach it. See
steps, covered distance, burned calories and sleep time.
Flow app lets you easily access your training targets and view fitness test results.Get a quick overview ofyour training and analyze every detail of your performance right away. See the weekly summaries of your training in the training diary. You can also share the highlights of you training with your friends in the Flow community.
You can also wirelessly setup your new A370 with it. See Setup your A370 how.
To start using the Flow app, download it from App Store or Google Play onto your mobile. For support andmore information about using Polar Flow app, go to support.polar.com/en/support/Flow_app. Before taking a
new mobile device (smartphone, tablet) into use, it has to be paired with your A370.

PAIR A MOBILE DEVICE WITH A370
Before pairing a mobile deviceldownload Flow app from the App Store or Google Play.

lmake sure your mobile device has Bluetooth turned on, and airplane mode/flight mode is not turned on.

Please note that you have to do the pairing in the Flow app and NOT in your mobile device's Bluetooth settings.
To pair a mobile device:
1. On your mobile device, open Flow app and sign in with your Polar account, which you have created
when setting up your A370.
2. Wait for the Connect product view to appear on your mobile device (Waiting for A370) is displayed.
3. On A370, press and hold the button.
4. Pair: touch device with A370 is displayed. Touch the mobile device with your A370.
5. Pairing is displayed.
6. Confirm on other dev. xxxxx is displayed on your A370. Enter the pin code from the A370 on themobile device. The pairing starts.
7. Pairing completed is displayed when you're done.

43

To see your training data in Flow app, you must sync your A370 with it after your session. When you sync
your A370 with the Flow app, your activity and training data are also synced automatically via an internet connection to the Flow web service. Flow app is the easiest way to sync your training data from your A370 withthe web service. For information on syncing, see Syncing.

POLAR FLOW WEB SERVICE
The Polar Flow web service shows your activity goal and the details of your activity, and helps you understand how your daily habits and choices affect your well-being. Flow web service allows you to plan and analyze every detail of your training and learn more about your performance and progress in the long run. Set up
and customize your A370 to perfectly fit your training needs by adding sport profiles and tailoring settings. You
can also share the highlights of you training with your friends in the Flow community.
To start using the Flow web service set up your A370 at flow.polar.com/start. There you are guided to download and install the FlowSync software for syncing data between your A370 and the web service, and to create a user account for the web service. Also get the Flow app for your mobile for instant analysis and for easy
data sync to the web service.

FEEDIn Feed you can see what you and your friends have been up to lately. Check out the latest training sessions
and activity summaries, share your best achievements, comment and like your friends' activities.

EXPLOREIn Explore you can browse the map and see other users' shared training sessions with route information. You
can also relive other people’s routes and see where the highlights happened.

DIARY
In Diary you can see your daily activity, planned training sessions (training targets), as well as review pasttraining results and fitness test results.

PROGRESSIn Progress you can follow your development with reports. Reports are a handy way to follow your progress intraining over longer periods. In week, month and year reports you can choose the sport for the report. In custom period, you can choose both the period and the sport. Choose the time period and sport for report from thedrop-down lists, and press the wheel icon to choose what data you want to view in the report graph.
For support and more information about using the Flow web service, go to, support.polar.com/en/support/flow.

COMMUNITY
In the Flow Groups, Clubs and Events you can find fellow exercisers who train for the same event or in thesame health club as you do. Or you can create your own group for the people you want to train with. You can44

share your exercises and training tips, comment other members’ training results and be part of the Polar Community. In Flow Clubs you can view class schedules and sign up for classes. Join in and get motivation fromyour social training communities!
To see a video, click on the following link:
Polar Flow Events

PROGRAMS
The Polar Running Program is tailored for your goal, based on Polar heart rate zones, taking your personal
attributes and training background into account. The program is intelligent, it adapts along the way based onyour development. The Polar Running Programs are available for 5 k, 10 k, half marathon and marathon
events, and consist of two to five running exercises per week depending on the program. It’s super simple!
For support and more information about using the Flow web service, go to, support.polar.com/en/support/flow.

PLAN YOUR TRAINING
Plan your training in the Flow web service by creating detailed training targets and syncing them to your A370
with Flowsync or via Flow app. Your A370 will guide you towards completing your target during training. Notethat A370 uses heart rate zones in training sessions planned in the Flow web service - EnergyPointer feature
is not available.
lllQuick Target: Choose a duration or calorie target for the training. You can, for example, choose to burn500 kcal or run for 30 minutes.
Phased Target: You can split your training session into phases and set a different duration and intensity for each of them. This one is for e.g. creating an interval training session, and adding proper warmup and cool-down phases to it.
Favorites: Create a target, and add it to Favorites to easily access it every time you want to perform it
again.

CREATE A TRAINING TARGET
1. Go to Diary, and click Add > Training target.
2. In the Add training target view, choose Quick or Phased.
Quick Target
1. Choose Quick.
2. Choose Sport, enter Target name (maximum 45 digits), Date and Time and any Notes (optional) you
want to add.
3. Fill in either duration or calories. You can only fill in one of the values.

45

4. Click the favorite icon

if you want to add the target to your Favorites.

5. Click Save to add the target to your Diary.
Phased target
1. Choose Phased.
2. Choose Sport, enter Target name (maximum 45 digits), Date and Time and any Notes (optional) you
want to add.
3. Choose whether you want to create a new phased target (CREATE NEW) or use the template (USETEMPLATE).
4. Add phases to your target. Click DURATION to add a phase based on duration.Choose name and duration for each phase, manual or automatic next phase start, and the intensity.
5. Click the favorite icon

if you want to add the target to your Favorites.

6. Click Save to add the target to your Diary.
Favorites
If you have created a target and added it to your favorites you can use it as a scheduled target.
1. Choose FAVORITE TARGETS. Your training target favorites are shown.
2. Click USE to select a favorite as a template for your target.
3. Enter Date and Time.
4. You can edit the target if you wish, or leave it as it is.
Editing the target in this view doesn’t affect the favorite target. If you want to edit the favorite target, go to FAVORITES by clicking the star-icon right next to your name and profile photo.
5. Click ADD TO DIARY to add the target to your Diary.
SYNC THE TARGETS TO YOUR A370
Remember to sync the training targets to your A370 from the Flow web service via FlowSync or
Flow App. If you don't sync them, they are only visible in your Flow web service Diary or Favorites list.
After syncing your training targets to your A370, you can find the training targets listed as favorites in Favorites.
For information on starting a training target session, see Start a training session.

46

FAVORITESIn Favorites, you can store and manage your favorite training targets in the Flow web service and the Flowmobile app. You can use your favorites as scheduled targets on your watch. For more information, see Plan
your training in the Flow web service.
You can see the maximum number of your watch. The number of favorites in the Flow web service is not limited. If you have over 20 favorites in the Flow web service, the first 20 in the list are transferred to your watch
when syncing. You can change the order of your favorites by dragging and dropping them. Choose the favorite
you want to move and drag it into the place you want to put it in the list.
ADD A TRAINING TARGET TO FAVORITES:
1. Create a training target.
2. Click the favorites iconon the lower right corner of the page.

3. The target is added to your favorites.
or
1. Open an existing target you've created from your Diary.
2. Click the favorites iconon the lower right corner of the page.

3. The target is added to your favorites.
EDIT A FAVORITE
1. Click the favorites icon
are shown.

on the upper right corner next to your name. All your favorite training targets

2. Click the favorite you want to edit, then click Edit.
3. You can change the sport, the target name, and you can add notes. You can alter the training details of
the target under Quick or Phased. (For more information , see the chapter on planning your training.)
After you've done all the needed changes, click Update changes.
REMOVE A FAVORITE
1. Click the favorites icon
are shown.

on the upper right corner next to your name. All your favorite training targets

2. Click the delete icon in upper right corner of the training target to remove it from the favorites list.

POLAR SPORT PROFILES IN FLOW WEB SERVICE
There are seven sport profiles on your A370 by default. In the Flow web service you can add new sport profiles
to your sports list, as well as edit them and existing profiles. Your A370 can contain a maximum of 20 sport
profiles. If you have over 20 sport profiles in the Flow web service, the first 20 in the list are transferred to yourA370 when syncing.

47You can change the order of your sport profiles by dragging and dropping them. Choose the sport you want tomove and drag it into the place you want to put it in the list.
ADD A SPORT PROFILE
In the Flow web service:
1. Click your name/profile photo in the upper right corner.
2. Choose Sport Profiles.
3. Click ADD SPORT PROFILE, and choose the sport from the list.
4. The sport is added to your sport list.
EDIT A SPORT PROFILE
In the Flow web service:
1. Click your name/profile photo in the upper right corner.
2. Choose Sport Profiles.
3. Click EDIT under the sport you want to edit.
In each sport profile, you can edit the following information:
Heart RatelllHeart rate view
Heart rate visible to other devices (Other compatible devices using Bluetooth ® Smart wireless technology (e.g. gym equipment) can detect your heart rate.)
Heart rate zone type of the training sessions you have created in the Flow web service and transferred
to your A370.

Gestures and FeedbacklVibration feedback

GPS and altitudelChoose the GPS recording rate.

When you're done with the sport profile settings, click SAVE. Remember to sync the settings to your A370.
Please note that in a number of indoor sports, group sports and team sports profiles the HR visible to otherdevices setting is enabled by default. This means that compatible devices using Bluetooth Smart wirelesstechnology, e.g. gym equipment, can detect your heart rate. You can check which sport profiles have48

Bluetooth broadcasting enabled by default from the Polar Sport profiles list. You can enable or disable
Bluetooth broadcasting from sport profile settings.

SYNCINGYou can transfer data from your A370 via the USB port with FlowSync software or wirelessly via Bluetooth
Smart® with the Flow app. To be able to sync data between your A370 and the Flow web service and app, youneed to have a Polar account and FlowSync software. You already have created the account and downloaded
the software, if you have set up your A370 at flow.polar.com/start. If you did the quick set up when starting touse your A370, go to flow.polar.com/start for the complete setup. Download Flow app onto your mobile fromthe App Store or Google Play.
Remember to sync and keep your data up-to-date between your A370, the web service and the mobile app
wherever you are.

SYNC WITH FLOW MOBILE APP
Before syncing make sure:l

You have a Polar account and Flow app.

lYour mobile device has Bluetooth turned on, and airplane mode/flight mode is not turned on.

l

You have paired your A370 with your mobile. For more information, see Polar Flow app.

Sync your data manually:
1. Sign into Flow app and press and hold the button on your A370.
2. Searching, Connecting is displayed, followed by Syncing.
3. Completed is displayed when you're done.
Your fitness tracker syncs hourly with Polar Flow app without you having to start it. Also after every training
session, inactivity alert, activity goal reached or a Fitness Test performed, the data is synced with the app in
the background.
When you sync your A370 with the Flow app, your activity and training data are also synced automatically via an internet connection to the Flow web service.
For support and more information about using Polar Flow app, go to support.polar.com/en/support/Flow_app

SYNC WITH FLOW WEB SERVICE VIA FLOWSYNC
To sync data with the Flow web service you need FlowSync software. Go to flow.polar.com/start, and download and install it before trying to sync.

49

1. Plug your A370 to your computer with the USB cable. Make sure FlowSync software is running.
2. The FlowSync window opens on your computer, and the syncing starts.
3. Completed is displayed when you are done.
Every time you plug in your A370 to your computer, the Polar FlowSync software will transfer your data to the
Polar Flow web service and sync any settings you may have changed. If the syncing does not automaticallystart, start FlowSync from the desktop icon (Windows) or from the applications folder (Mac OS X). Every timea firmware update is available, FlowSync will notify you, and request you to install it.
If you change settings in the Flow web service while your A370 is plugged into your computer, press thesynchronize button on FlowSync to transfer to the settings to your A370.
For support and more information about using the Flow web service, go to support.polar.com/en/support/flow.
For support and more information about using FlowSync software, go to support.polar.com/en/support/FlowSync.

50

IMPORTANT INFORMATIONTAKING CARE OF YOUR A370
Like any electronic device, Polar A370 should be treated with care. The suggestions below will help you fulfill
guarantee obligations and enjoy this product for many years to come.
The USB cable must be connected carefully to avoid damaging the device's USB port.
Don't charge the device when its USB port is wet. Let the USB port dry up by leaving the port cover open
for a while before charging. This way you'll ensure smooth charging and syncing.

Keep your training device clean.
l

We recommend that you wash the device and the silicone wristband after each training session under
running water with a mild soap and water solution. Please remove the device from the wristband andwash them separately. Wipe them dry with a soft towel.

It is essential that you wash the device and the wristband if you wear them in a swimming pool wherechlorine is used for keeping the pool clean.
ll

If you don't wear the device 24/7, wipe off any moisture before storing it. Don't store in non-breathable
material or in a damp environment, e.g. plastic bag or damp gym bag.
Wipe it dry with a soft towel when needed. Use a damp paper towel to wipe dirt from the training
device. To maintain the water resistance, do not wash the training device with a pressure washer.
Never use alcohol or any abrasive material such as steel wool or cleaning chemicals.

51lWhen you connect your A370 to a computer or a charger, check that there is no moisture, hair, dust or
dirt on the A370's USB connector. Gently wipe off any dirt or moisture. Don't use any sharp tools forcleaning to avoid scratching.

Operating temperatures are -10 °C to +50 °C / +14 °F to +122 °F.

STORING
Keep your training device in a cool and dry place. Do not keep them in a damp environment, in non-breathable
material (a plastic bag or a sports bag) nor with conductive material (a wet towel). Do not expose the training
device to direct sunlight for extended periods, such as by leaving it in a car or mounted on the bike mount.
It is recommended to store the training device partially or fully charged. The battery slowly loses its charge
when it is stored. If you are going to store the training device for several months, it is recommended torecharge it after a few months. This will prolong the battery lifetime.
Dry and store the strap and the connector separately to maximize the heart rate sensor battery lifetime. Keepthe heart rate sensor in a cool and dry place. To prevent snap oxidation, do not store the heart rate sensor wet
in non-breathing material, such as a sports bag. Do not expose the heart rate sensor to direct sunlight forextended periods.

SERVICE
During the two-year guarantee/warranty period we recommend that you have service done by an authorized
Polar Service Center only. The warranty does not cover damage or consequential damage caused by service
not authorized by Polar Electro. For further information, see Limited International Polar Guarantee.
For contact information and all Polar Service Center addresses, visit support.polar.com and country-specificwebsites.

BATTERIESAt the end of the working life of the product Polar encourages you to minimize possible effects of waste on theenvironment and human health by following local waste disposal regulations and, where possible, utilizing separate collection of electronic devices. Do not dispose of this product as unsorted municipal waste.

CHARGING A370 BATTERY
The A370 has an internal, rechargeable battery. Rechargeable batteries have a limited number of charge
cycles. You can charge and discharge the battery over 300 times before a notable decrease in its capacity.
The number of charge cycles also varies according to use and operating conditions.
Do not charge the battery in temperatures under 0°C or over +40°C or when the USB port is wet.
Do not charge the device if the USB port is broken.

52You can charge the battery via a wall outlet. When charging via a wall outlet, use a USB power adapter (notincluded in the product set). If you use a USB power adapter, make sure that the adapter is marked with "output 5Vdc" and that it provides a minimum of 500mA. Only use an adequately safety approved USB power
adapter (marked with "LPS", "Limited Power Supply", "UL listed" or “CE”).

Do not charge Polar products with a 9 volt charger. Using a 9 volt charger can damage your Polar product.

To charge with your computer just plug your A370 to your computer and at the same time you can have it
synced it with FlowSync.

1. Push down the top part (A) of the USB cover inside the bracelet to access the micro USB port and plugin the supplied USB cable (B).

53

2. Plug the other end of the cable into your computer's USB port. Check that the USB port is dry before
connecting it to the computer. If the battery is completely empty, it takes a couple of minutes for the
charging to start.

3. After syncing, green battery icon animation begins to fill up on the display.
4. When the green battery icon is full, the A370 is fully charged.
Don't leave the battery fully discharged for a long period of time or keep it fully charged all the time,
because it may affect the battery life time.
BATTERY OPERATING TIME
The battery operating time is up to 4 days with 24/7 activity tracking, continuous HR tracking and 1h/day training without Smart Notifications on. The operating time depends on many factors, such as the temperature of
the environment in which you use your A370, the features you use, how much the display is on and battery
aging. The operating time is significantly reduced in temperatures well below freezing. Wearing the A370
under your overcoat helps to keep it warmer and to increase the operating time.
LOW BATTERY NOTIFICATIONS
Battery low. Charge
The battery charge is low. It is recommended to charge A370.

54

Charge before training.
The charge is too low for recording a training session. A new training session cannot be started before charging A370.
When the display doesn't wake up from a wrist gesture or a press of the button, the battery is empty and A370
has gone to sleep mode. Charge your A370. If the battery is totally drained, it may take a while for the charging
animation to appear on the display.

PRECAUTIONSThe Polar A370 is designed to measure heart rate and tell your activity. No other use is intended or implied.
The training device should not be used for obtaining environmental measurements that require professional orindustrial precision.
The Polar A370 is not a medical device for measuring your heart rate.
We recommend that once in a while you wash the device and the wrist strap to avoid any skin problems froma dirty bracelet.

INTERFERENCE DURING TRAINING
Electromagnetic Interference and Training Equipment
Disturbance may occur near electrical devices. Also WLAN base stations may cause interference when training with the training device. To avoid erratic reading or misbehavior, move away from possible sources of disturbance.
Training equipment with electronic or electrical components such as LED displays, motors and electricalbrakes may cause interfering stray signals. To solve these problems, try the following:
1. Remove the heart rate sensor strap from your chest and use the training equipment as you would normally.
2. Move the training device around until you find an area in which it displays no stray reading or does not
flash the heart symbol. Interference is often worst directly in front of the display panel of the equipment,
while the left or right side of the display is relatively free of disturbance.
3. Put the heart rate sensor strap back on your chest and keep the training device in this interference-freearea as much as possible.
If the training device still does not work with the training equipment, it may be electrically too noisy for wireless heart rate measurement.

55

HEALTH AND TRAINING
Training may include some risk. Before beginning a regular training program, it is recommended that you
answer the following questions concerning your health status. If you answer yes to any of these questions,
we recommend that you consult a doctor before starting any training program.
lHave you been physically inactive for the past 5 years?

l

Do you have high blood pressure or high blood cholesterol?

l

Are you taking any blood pressure or heart medication?

l

Do you have a history of breathing problems?

l

Do you have symptoms of any disease?

l

Are you recovering from a serious illness or medical treatment?

l

Do you use a pacemaker or other implanted electronic device?

l

Do you smoke?

l

Are you pregnant?

Note that in addition to training intensity, medications for heart conditions, blood pressure, psychological conditions, asthma, breathing, etc., as well as some energy drinks, alcohol, and nicotine may also affect heartrate.
It is important to be sensitive to your body’s responses during training. If you feel unexpected pain orexcessive fatigue when training, it is recommended that you stop the training or continue at a lighter
intensity.
Note! If you are using a pacemaker or other implanted electronic device, you can use Polar products. In theory
interference to pacemaker caused by Polar products should not be possible. In practice no reports exist to suggest anyone ever having experienced interference. We cannot however issue an official guarantee on our
products’ suitability with all pacemakers or other implanted devices due to the variety of devices available. If
you have any doubts, or if you experience any unusual sensations while using Polar products, please consult
your physician or contact the implanted electronic device manufacturer to determine safety in your case.
If you are allergic to any substance that comes into contact with your skin or if you suspect an allergic reaction
due to using the product, check the listed materials in Technical Specifications. If you experience any skinreaction, stop using the product and consult your physician. Also inform Polar Customer Care about your skinreaction. To avoid any skin reaction to the heart rate sensor, wear it over a shirt, but moisten the shirt wellunder the electrodes to ensure flawless operation.
The combined impact of moisture and intense abrasion may cause color to come off the heart rate sensor's orwristband's surface, possibly staining light-colored clothes. It may also cause a darker color to come off clothing, possibly staining lighter-colored training devices. To keep a light-colored training device glowing for years
to come, please make sure the clothing you wear while training does not bleed color. If you use perfume,
lotion, suntan/sunscreen or insect repellent on your skin, you must ensure that it does not come into contact
with the training device or the heart rate sensor. If you train in cold conditions (-20 °C to -10 °C / -4 °F to 14 °F)
we recommend that you wear the training device under the sleeve of your jacket, directly on your skin.

56

WARNING - KEEP BATTERIES OUT OF REACH OF CHILDREN
Polar heart rate sensors (for example H10 and H9) contain a button cell battery. If the button cell battery isswallowed, it can cause severe internal burns in as little as 2 hours and can lead to death. Keep new andused batteries away from children. If the battery compartment does not close securely, stop using the
product and keep it away from children. If you think batteries might have been swallowed or placed
inside any part of the body, seek immediate medical attention.

HOW TO USE YOUR POLAR PRODUCT SECURELY
Data security updates are performed two years onwards from a product’s announced end-of-life date. Please
update your Polar product regularly, and as soon as the Polar Flow mobile application or Polar FlowSync computer software informs you about the availability of a new firmware version.
Training session data and other data saved on your Polar device include sensitive information about you suchas your name, physical information, overall health and location. Location data can be used to track you when
you are out training and to find out what your usual routes are. For these reasons use extra caution when storing your device when not using it.
If you use phone notifications on your wrist device, be aware that messages from certain applications will be
projected on the wrist device display. Your latest messages can also be viewed from the device menu. To
ensure the confidentiality of your private messages, refrain from using the phone notifications feature.
Before handing the device over to a third party for testing or before selling it, it is necessary to perform a factory reset on the device, and to remove the device from your Polar Flow account. A factory reset can be performed with the FlowSync software on your computer. A factory reset will clear the device memory, and thedevice cannot be linked to your data anymore. To remove the device from your Polar Flow account, sign into
the Polar Flow web service, choose products and click the “Remove” button next to the product you wish toremove.
The same training sessions are also stored on your mobile device with the Polar Flow application. For extra
security, various security enhancing options can be enabled on your mobile device such as strong authentication and device encryption. Consult the user manual of your mobile device for instructions on enablingthese options.
When using the Polar Flow web service, we recommend using a password that is no less than 12 charactersin length. If using the Polar Flow web service on a public computer, please remember to clear the cache andbrowsing history in order to prevent others from accessing your account. In addition, do not allow a computer’sbrowser to store or remember your password for the Polar Flow web service if it is not your private computer.
Any security issues can be reported to security(a)polar.com or to Polar Customer Care.

TECHNICAL SPECIFICATION
A370
Battery type:

100 mAh Li-pol rechargeable battery

57

Operating time:

Up to 4 days with 24/7 activity tracking,continuous HR tracking and 1h/day training without Smart Notifications on.

Operating time in training mode:

Up to 13 hours with mobile GPS on. Up
to 32 hours with mobile GPS off.

Operating temperature:-10 °C to +50 °C / 14 °F to 122 °F

Charging time:

Up to two hours.

Charging temperature:

0 °C to +40 °C / 32 °F to 104 °F

Fitness tracker materials:

Device: thermoplastic polyurethane,acrylonitrile butadiene styrene, glass
fiber, polycarbonate, stainless steel,glass
Wristband: silicone, stainless steel, polybutylene terepthalate, glass fiber

Watch accuracy:

Better than ± 0.5 seconds / day at 25 °C/ 77 °F temperatureHeart rate measuring range:

30-240 bpm

Water resistance:

30 m

Memory capacity:

60 h training with heart rate depending on
your language settings

Uses Bluetooth® wireless technology.
Your A370 is compatible with the following Polar heart rate sensors as well: Polar H6, H7, H10 and OH1.

POLAR FLOWSYNC SOFTWARE
To use FlowSync software you need a computer with Microsoft Windows or Mac operating system with aninternet connection and a free USB port.
Check the latest compatibility information from support.polar.com.

POLAR FLOW MOBILE APPLICATION COMPATIBILITY
Check the latest compatibility information from support.polar.com.

58

WATER RESISTANCE OF POLAR PRODUCTS
Most Polar products can be worn when swimming. They are not, however, diving instruments. To maintainwater resistance, do not press the buttons of the device under water.
Polar devices with wrist-based heart rate measurement are suitable for swimming and bathing. They willcollect your activity data from your wrist movements also when swimming. In our tests, however, we foundthat the wrist-based heart rate measurement doesn’t work optimally in water, so we cannot recommend wristbased heart rate measurement for swimming.
In the watch industry, water resistance is generally indicated as meters, which means the static water pressure of that depth. Polar uses this same indication system. Water resistance of Polar products is tested
according to International Standard ISO 22810 or IEC60529. Every Polar device that has water resistanceindication is tested before the delivery to stand water pressure.
Polar products are divided into four different categories according to their water resistance. Check the back ofyour Polar product for the water resistance category, and compare it to the chart below. Please note that thesedefinitions do not necessarily apply to products of other manufacturers.
When performing any underwater activity, the dynamic pressure generated by moving in water is greater than
the static pressure. This means that moving the product under water subjects it to a greater pressure than if
the product were stationary.
Marking on theback of the
product

Wash
Bathing andsplashes,
swimming
sweat, raindrops etc.

Skin diving
SCUBA
with snorkel diving(no air tanks) (withairtanks)

Water resistant characteristics

Water resistant
IPX7

OK

-

-

-

Do not wash with a pressure washer.
Protected against
splashes, raindrops etc.
Reference standard:
IEC60529.

Water resistant
IPX8

OK

OK

-

-

Minimum for bathing andswimming.
Reference standard:
IEC60529.

Water resistant
Water resistant
20/30/50 meters
Suitable for swimming

OK

OK

-

-

Minimum for bathing andswimming.
Reference standard:
ISO22810.

Water resistant 100
meters

OK

OK

OK

-

For frequent use in water
but not SCUBA diving.

59Reference standard:
ISO22810.

LIMITED INTERNATIONAL POLAR GUARANTEE
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Polar Electro Oy issues a limited international guarantee for Polar products. For products which havebeen sold in the USA or Canada, guarantee is issued by Polar Electro, Inc.
Polar Electro Oy/Polar Electro Inc. guarantees the original consumer/purchaser of the Polar productthat the product will be free from defects in material or workmanship for two (2) years from the date ofpurchase, with the exception of wristbands made of silicone or plastic, which are subject to a guarantee period of one (1) year from the date of purchase.
The guarantee does not cover normal wear and tear of the battery, or other normal wear and tear, damage due to misuse, abuse, accidents or non-compliance with the precautions; improper maintenance,
commercial use, cracked, broken or scratched cases/displays, textile armband or textile or leather
wristband, elastic strap (e.g. heart rate sensor chest strap) and Polar apparel.
The guarantee does also not cover any damage/s, losses, costs or expenses, direct, indirect or incidental, consequential or special, arising out of, or related to the product.
Guarantee does not cover products which have been purchased second hand.
During the guarantee period, the product will be either repaired or replaced at any authorized Polar Central Service regardless of the country of purchase.
Guarantee issued by Polar Electro Oy/Inc. does not affect the consumer’s statutory rights under applicable national or state laws in force, or the consumer’s rights against the dealer arising from theirsales/purchase contract.
You should keep the receipt as a proof of purchase!
Guarantee with respect to any product will be limited to countries where the product has been initiallymarketed by Polar Electro Oy/Inc.

Manufactured by Polar Electro Oy, Professorintie 5, 90440 KEMPELE, Finland www.polar.com.
Polar Electro Oy is a ISO 9001:2015 certified company.
© 2021 Polar Electro Oy, 90440 KEMPELE, Finland. All rights reserved. No part of this manual may be usedor reproduced in any form or by any means without prior written permission of Polar Electro Oy.
The names and logos in this user manual or in the package of this product are trademarks of Polar Electro Oy.
The names and logos marked with a ® symbol in this user manual or in the package of this product areregistered trademarks of Polar Electro Oy. Windows is a registered trademark of Microsoft Corporation and
Mac OS is a registered trademark of Apple Inc. The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Polar Electro Oy is under license.

60

DISCLAIMERlll

The material in this manual is for informational purposes only. The products it describes are subject tochange without prior notice, due to the manufacturer’s continuous development program.
Polar Electro Inc./Polar Electro Oy makes no representations or warranties with respect to this manualor with respect to the products described herein.
Polar Electro Inc./Polar Electro Oy shall not be liable for any damages, losses, costs or expenses, direct, indirect or incidental, consequential or special, arising out of, or related to the use of this material or
the products described herein.

1.1 EN 02/202261