FORERUNNER 645/645 MUSIC ® Owner’s Manual
© 2018 Garmin Ltd. or its subsidiaries All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Garmin. Garmin reserves the right to change or improve its products and to make changes in the content of this manual without obligation to notify any person or organization of such changes or improvements. Go to www.garmin.com for current updates and supplemental information concerning the use of this product.
Table of Contents Introduction.....................................................................1 Keys ............................................................................................ 1 GPS Status and Status Icons ................................................ 1 Pairing Your Smartphone with Your Device ............................... 1 Enabling Bluetooth Notifications ............................................ 1 Viewing Notifications .......................................................
Music Playback Controls .......................................................... 16 Connecting Headphones using Bluetooth Technology ............. 16 Garmin Pay................................................................... 16 Setting Up Your Garmin Pay Wallet ......................................... 16 Paying for a Purchase Using Your Watch ................................ 16 Adding a Card to Your Garmin Pay Wallet ............................... 17 Managing Your Garmin Pay Wallet .................
Introduction WARNING See the Important Safety and Product Information guide in the product box for product warnings and other important information. Always consult your physician before you begin or modify any exercise program. Keys 2 Bring your smartphone within 10 m (33 ft.) of your device. 3 Select LIGHT to turn on the device. The first time you turn on the device, it is in pairing mode. TIP: You can hold LIGHT and select to manually enter pairing mode.
NOTE: The Lap Alert audio prompt is enabled by default. 1 From the settings in the Garmin Connect Mobile app, select Garmin Devices. 2 Select your device. 3 Select Activity Options > Audio Prompts. Turning Off the Bluetooth Smartphone Connection 1 Hold LIGHT to view the controls menu. 2 Select to turn off the Bluetooth smartphone connection on your Forerunner device. Refer to the owner's manual for your mobile device to turn off Bluetooth wireless technology on your mobile device.
• To navigate back to the starting point of your activity along the path you traveled, select Back to Start > TracBack. NOTE: This feature is available only for activities that use GPS. • To navigate back to the starting point of your activity by the most direct path, select Back to Start > Straight Line. NOTE: This feature is available only for activities that use GPS. • To discard the activity and return to watch mode, select Discard > Yes.
Training 2 During a rest, select UP or DOWN to view other data screens (optional). 3 Select BACK, and continue swimming. 4 Repeat for additional rest intervals. Training with the Drill Log The drill log feature is available only for pool swimming. You can use the drill log feature to manually record kick sets, one-arm swimming, or any type of swimming that is not one of the four major strokes. 1 During your pool swim activity, select UP or DOWN to view the drill log screen.
km race. The plan adjusts to your current level of fitness, coaching and schedule preferences, and race date. When you start a plan, the Garmin Coach widget is added to the widget loop on your Forerunner device. Interval Workouts You can create interval workouts based on distance or time. The device saves your custom interval workout until you create another interval workout. You can use open intervals for track workouts and when you are running a known distance.
Personal Records When you complete an activity, the device displays any new personal records you achieved during that activity. Personal records include your fastest time over several typical race distances and longest run or ride. Viewing Your Personal Records 1 Hold UP. 2 Select History > Records. 3 Select a sport. 4 Select a record. 5 Select View Record. Restoring a Personal Record You can set each personal record back to the one previously recorded. 1 Hold UP. 2 Select History > Records.
Setting Up Your User Profile You can update your gender, birth year, height, weight, and heart rate zone settings. The device uses this information to calculate accurate training data. 1 Hold UP. 2 Select Settings > User Profile. 3 Select an option. Fitness Goals Knowing your heart rate zones can help you measure and improve your fitness by understanding and applying these principles. • Your heart rate is a good measure of exercise intensity.
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 23).
• Avoid wearing sunscreen, lotion, and insect repellent under the device. • Avoid scratching the heart rate sensor on the back of the device. • Wear the device above your wrist bone. The device should be snug but comfortable. • Wait until the icon is solid before starting your activity. • Warm up for 5 to 10 minutes and get a heart rate reading before starting your activity. NOTE: In cold environments, warm up indoors. • Rinse the device with fresh water after each workout.
5 If necessary, hold UP to edit how the running dynamics data appears. Color Gauges and Running Dynamics Data The running dynamics screens display a color gauge for the primary metric. You can display cadence, vertical oscillation, ground contact time, ground contact time balance, or vertical ratio as the primary metric. The color gauge shows you how your running dynamics data compare to those of other runners. The color zones are based on percentiles.
These estimates are provided and supported by Firstbeat. For more information, go to www.garmin.com/physio. NOTE: The estimates may seem inaccurate at first. The device requires you to complete a few activities to learn about your performance. Training status: Training status shows you how your training affects your fitness and performance. Your training status is based on changes to your training load and VO2 max. over an extended time period. VO2 max.: VO2 max.
After using the device for one week, your training status should be available. • Record all of your fitness activities on this device, or enable the Physio TrueUp™ feature, allowing your device to learn about your performance (Syncing Activities and Performance Measurements, page 11). About VO2 Max. Estimates VO2 max. is the maximum volume of oxygen (in milliliters) you can consume per minute per kilogram of body weight at your maximum performance. In simple terms, VO2 max.
activities. It takes several activities for the device to learn your aerobic and anaerobic fitness. You can add Training Effect as a data field to one of your training screens to monitor your numbers throughout the activity. Color Zone Training Effect Aerobic Benefit Anaerobic Benefit From 0.0 to 0.9 No benefit. No benefit. From 1.0 to 1.9 Minor benefit. Minor benefit. From 2.0 to 2.9 Maintains your aerobic fitness. Maintains your anaerobic fitness. From 3.0 to 3.
email or social media, allowing them to view your live data on a Garmin Connect tracking page. GroupTrack: Allows you join a group using LiveTrack, so others can view your position directly on screen and in real time. Activity uploads: Automatically sends your activity to the Garmin Connect Mobile app as soon as you finish recording the activity. Software updates: Allows you to update your device software.
3 From the settings menu in the Garmin Connect Mobile app, 4 5 6 7 select LiveTrack > GroupTrack. If you have more than one compatible device, select a device for the GroupTrack session. Select Visible to > All Connections. Select Start LiveTrack. On your Forerunner device, start an activity. Tips for Joining GroupTrack Sessions The GroupTrack feature allows connections in your group to keep track of you using LiveTrack directly on their screens.
2 Select Garmin Devices, and select your device. 3 Select Music. 4 Select an installed third-party provider, and follow the on- screen instructions to disconnect the third-party provider from your device. Downloading Personal Audio Content Before you can send your personal music to your device, you must install the Garmin Express™ application on your computer (www.garmin.com/express). You can load your personal audio files, such as .mp3 and .aac files, to a Forerunner 645 Music device from your computer.
NOTE: If you enter your passcode incorrectly three times, your wallet locks, and you must reset your passcode in the Garmin Connect Mobile app. Your most recently used payment card appears. 4 If you have added multiple cards to your Garmin Pay wallet, select DOWN to change to another card (optional). Forerunner device until you create a new wallet and add a card. Changing Your Garmin Pay Passcode You must know your current passcode to change it. Your passcode cannot be recovered.
4 Select an option to view weekly or monthly totals. Using the Odometer NOTE: Some data requires an optional accessory such as a heart rate monitor. The odometer automatically records the total distance traveled, elevation gained, and time in activities. 1 Hold UP. 2 Select History > Totals > Odometer. 3 Select UP or DOWN to view odometer totals. Deleting History 1 Hold UP. 2 Select History > Options. 3 Select an option: • Select Delete All Activities to delete all activities from the history.
You can also follow a saved course, trying to match or exceed previously set performance goals. For example, if the original course was completed in 30 minutes, you can race against a Virtual Partner trying to complete the course in under 30 minutes. Creating and Following a Course on Your Device 1 From the watch face, select START. 2 Select an activity. 3 Hold UP, and select Navigation > Courses > Create New. 4 Enter a name for the course, and select . 5 Select Add Location. 6 Select an option.
Wireless Sensors Your device can be used with wireless ANT+ or Bluetooth sensors. For more information about compatibility and purchasing optional sensors, go to buy.garmin.com. Pairing Your Wireless Sensors The first time you connect a wireless sensor to your device using ANT+ or Bluetooth technology, you must pair the device and sensor. After they are paired, the device connects to the sensor automatically when you start an activity and the sensor is active and within range.
accurate temperature data. You must pair the tempe with your device to display temperature data from the tempe. Customizing Your Device Customizing Your Activity List 1 Hold UP. 2 Select Settings > Activities & Apps. 3 Select an option: • Select an activity to customize the settings, set the activity as a favorite, change the order of appearance, and more. • Select Add to add more activities or create custom activities.
Event alert: An event alert notifies you once. The event is a specific value. For example, you can set the device to alert you when you reach a specified elevation. Range alert: A range alert notifies you each time the device is above or below a specified range of values. For example, you can set the device to alert you when your heart rate is below 60 beats per minute (bpm) and over 210 bpm. Recurring alert: A recurring alert notifies you each time the device records a specified value or interval.
1 2 3 4 5 Hold UP. Select Settings > Activities & Apps. Select the activity to customize. Select the activity settings. Select GPS, and select an option. UltraTrac The UltraTrac feature is a GPS setting that records track points and sensor data less frequently. Enabling the UltraTrac feature increases battery life but decreases the quality of recorded activities.
4 Select an option: • Select Keys and Alerts to turn on the backlight for key presses and alerts. • Select Gesture to turn on the backlight by raising and turning your arm to look at your wrist. • Select Timeout to set the length of time before the backlight turns off. Changing the Units of Measure You can customize units of measure for distance, pace and speed, elevation, weight, height, and temperature. 1 Hold UP. 2 Select Settings > System > Units. 3 Select a measurement type.
5 Hold UP. 6 Select VIRB. 7 Select an option: • To control the camera using the activity timer, select Settings > Timer Start/Stop. NOTE: Video recording automatically starts and stops when you start and stop an activity. • To control the camera using the menu options, select Settings > Manual. • To manually record video, select Start Recording. The video counter appears on the Forerunner screen. • To take a photo while recording video, select DOWN. • To manually stop recording video, select STOP.
Cleaning the Device Activity Tracking NOTICE Even small amounts of sweat or moisture can cause corrosion of the electrical contacts when connected to a charger. Corrosion can prevent charging and data transfer. For more information about activity tracking accuracy, go to garmin.com/ataccuracy. 1 Wipe the device using a cloth dampened with a mild detergent solution. Wipe it dry. 2 After cleaning, allow the device to dry completely. TIP: For more information, go to www.garmin.com/fitandcare.
◦ Sync your device to the Garmin Connect Mobile app using your Bluetooth enabled smartphone. ◦ Connect your device to your Garmin Connect account using a Wi‑Fi wireless network. While connected to your Garmin Connect account, the device downloads several days of satellite data, allowing it to quickly locate satellite signals. • Take your device outside to an open area away from tall buildings and trees. • Remain stationary for a few minutes.
2 If you are pairing a heart rate monitor, put on the heart rate monitor. The heart rate monitor does not send or receive data until you put it on. Hold UP. 3 4 Select Settings > Sensors & Accessories > Add New. 5 Select an option: • Select Search All. • Select your sensor type. After the sensor is paired with your device, a message appears. Sensor data appears in the data page loop or a custom data field. Can I use my Bluetooth sensor with my watch? The device is compatible with some Bluetooth sensors.
ETE: The estimated time remaining until you reach the final destination. You must be navigating for this data to appear. GCT: The amount of time in each step that you spend on the ground while running, measured in milliseconds. Ground contact time is not calculated while walking. GCT Balance: The left/right balance of ground contact time while running. Glide Ratio: The ratio of horizontal distance traveled to the change in vertical distance. Glide Ratio Dest.
Sunset: The time of sunset based on your GPS position. Temperature: The temperature of the air. Your body temperature affects the temperature sensor. Time in Zone: The time elapsed in each heart rate or power zone. Time of Day: The time of day based on your current location and time settings (format, time zone, daylight saving time). Timer: The stopwatch time for the current activity. Time to Next: The estimated time remaining before you reach the next waypoint in the route.
Tire Size Wheel Circumference (mm) 700C Tubular 2130 700 × 28C 2136 700 × 30C 2146 700 × 32C 2155 700 × 35C 2168 700 × 38C 2180 700 × 40C 2200 700 × 44C 2235 700 × 45C 2242 700 × 47C 2268 Symbol Definitions These symbols may appear on the device or accessory labels. Alternating current. The device is suitable for alternating current. Direct current. The device is suitable for direct current only. Fuse. Indicates a fuse specification or location. WEEE disposal and recycling symbol.
Index A accessories 20, 26–28 activities 2, 3, 21, 23 custom 3, 21 saving 2 starting 2 activity tracking 7, 8 alarms 21, 24 alert 4 alerts 21, 22 ANT+ sensors 20 applications 13, 15 smartphone 1 Auto Lap 22 Auto Pause 22 auto scroll 22 B backlight 1, 23 bands 26 battery charging 25 maximizing 2, 23, 27 bike sensors 20 Bluetooth sensors 20 Bluetooth technology 1, 2, 4, 13, 14, 27 headphones 16, 28 C cadence 6, 9, 10 alerts 22 sensors 20 calendar 4 calorie, alerts 22 charging 25 cleaning the device 25, 26 c
Wi‑Fi 27 connecting 15 widgets 9, 14, 15 workouts 4 loading 4 Z zones heart rate 7 time 24 Index 33
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