At first I thought I must have been accidentally turning on running mode but have since realised that the wrist based heart rate monitor is permanently on which I believe is the cause of the poor battery. I have restored all settings, done a soft reset and done a hard reset. All failed to solve the issue. The watch is; Software Version: 7.50 Forerunner 230, the GPS running watch with smart features. Golf Marathon Multisport & Triathlete Swimming Diving Water Sports Scales & Heart Rate Monitors Kids Wear the Forerunner® device above your wrist bone. NOTE: The device should be snug but comfortable, and it should not move while running. Do not remove or discard the light seal (soft rubber part) on the back of the device. See Troubleshooting for more information. The heart rate monitor feature in the Forerunner device is Philips ® licensed This (along with basic information like your age and sex) is what GPS watches like the Garmin Forerunner 230, 235, and 630 do, by having you run for at least 10 minutes while simultaneously Turning Off the Wrist Heart Rate Monitor. The default setting for the Forerunner® 235 is Auto. The device uses wrist-based heart rate automatically unless there is an accessory heart rate monitor connected to the device. Select Menu > Settings > Heart Rate Monitor > Off. Forerunner® 230/235 Owner's Manual. Broadcasting Heart Rate Data to Garmin Devices; Caring for the Heart Rate Monitor; Again this mainly a ruining watch for beginners, not for serious marathoners or tri sport persons. If your are looking for a multi sport watch or a watch that would give you extensive running dynamics, you better look some where else. Garmin - Forerunner 230 GPS Running Watch - Force Yellow. recommend this to a friend. Viewing History. Select Menu > History > Activities. Select or to view your saved activities. Select an activity. Select an option: Select Details to view additional information about the activity. Select Laps to select a lap and view additional information about each lap. Select Time in Zone to view your time in each heart rate zone. vívosmart 4. Press the Menu button. Tap the Settings Icon. Tap the Heart Rate Settings Icon. Tap Abnormal Heart Rate Alerts. Turn on High or Low Alerts. Set the heart rate threshold. Garmin wearables are not medical devices. For instructions on how to set abnormal heart rate alert for your Garmin device visit here : Today I wore the watch on a treadmill with HRM in the handles. This confirmed that the watch was seriously wrong for much of the run. My first 15 minutes was a warm up - easy pace and little effort. Treadmill said HR of 110-115 bpm. Watch said 145-155!! After about 15 minutes the watch then matched the treadmill - and how I felt! So, the aeUm.