2 Press to view the menu.3 Select > .4 Hold the arm wearing the device at heart level while thedevice reads your blood oxygen saturation.5 Keep still.The device displays your oxygen saturation as a percentage.NOTE: You can customize the pulse oximeter settings in yourGarmin Connect account (Activity Tracking Settings, page 8).Activating Pulse Oximeter Sleep TrackingYou can set your device to continuously measure your bloodoxygen level, or SpO2, while you sleep (Tips for Erratic PulseOximeter Data, page 10).1 From the settings menu in the Garmin Connect Mobile app,select Garmin Devices.2 Select your device.3 Select Activity Tracking > Pulse Ox.4 Select Pulse Ox Sleep Tracking.NOTE: Unusual sleep positions could cause abnormally lowsleep-time SpO2 readings.Setting an Abnormal Heart Rate AlertYou can set the device to alert you when your heart rateexceeds a certain number of beats per minute (bpm) after aperiod of inactivity. You can set the heart rate threshold in yourGarmin Connect account (Sound and Alert Settings, page 8).1 Press to view the menu.2 Select > > Abnormal Heart Rate Alerts.3 Tap the screen once to enable the alert.Each time you exceed the custom value, a message appearsand the device vibrates.NOTE: You must enable the alert on your device and yourGarmin Connect account.Broadcasting Heart Rate Data to Garmin DevicesYou can broadcast your heart rate data from your vívosmart 4device and view it on paired Garmin devices. For example, youcan broadcast your heart rate data to an Edge®device whilecycling, or to a VIRB action camera during an activity.NOTE: Broadcasting heart rate data decreases battery life.1 Press to view the menu.2 Select > .The vívosmart 4 device starts broadcasting your heart ratedata.NOTE: You can swipe to view the time and date widget whilebroadcasting heart rate data.3 Pair your vívosmart 4 device with your Garmin ANT+®compatible device.NOTE: The pairing instructions differ for each Garmincompatible device. See your owner's manual.4 Press to stop broadcasting your heart rate data.About VO2 Max. EstimatesVO2 max. is the maximum volume of oxygen (in milliliters) youcan consume per minute per kilogram of body weight at yourmaximum performance. In simple terms, VO2 max. is anindication of athletic performance and should increase as yourlevel of fitness improves.On the device, your VO2 max. estimate appears as a numberand description. On your Garmin Connect account, you can viewadditional details about your VO2 max. estimate, including yourfitness age. Your fitness age gives you an idea of how yourfitness compares with a person of the same gender and differentage. As you exercise, your fitness age can decrease over time.VO2 max. data is provided by FirstBeat. VO2 max. analysis isprovided with permission from The Cooper Institute®. For moreinformation, see the appendix (VO2 Max. Standard Ratings,page 12), and go to www.CooperInstitute.org.Getting Your VO2 Max. EstimateThe device requires wrist-based heart rate data and a timed 15minute brisk walk or run to display your VO2 max. estimate.1 Press to view the menu.2 Select > .If you have already recorded a 15 minute brisk walk or run,your VO2 max. estimate may appear. The device updatesyour VO2 max. estimate each time you complete a timedwalk or run.3 Follow the on-screen instructions to get your VO2 max.estimate.A message appears when the test is complete.4 To manually start a VO2 max. test to get an updatedestimate, tap your current reading and follow the instructions.The device will update with your new VO2 max. estimate.Garmin ConnectYou can connect with your friends on your Garmin Connectaccount. Garmin Connect gives you the tools to track, analyze,share, and encourage each other. Record the events of youractive lifestyle including runs, walks, rides, swims, hikes, andmore.You can create your free Garmin Connect account when youpair your device with your phone using the Garmin ConnectMobile app, or you can go to connect.garmin.com.Track your progress: You can track your daily steps, join afriendly competition with your connections, and meet yourgoals.Store your activities: After you complete and save a timedactivity with your device, you can upload that activity to yourGarmin Connect account and keep it as long as you want.Analyze your data: You can view more detailed informationabout your activity, including time, distance, heart rate,calories burned, and customizable reports.Share your activities: You can connect with friends to followeach other's activities or post links to your activities on yourfavorite social networking sites.6 Garmin Connect