Conquer every hour of the day with advanced training features, 24/7 health and wellness monitoring, and up to 31 days of battery life in smartwatch mode. See it all on a stunning AMOLED display with a scratch-resistant sapphire lens and a new design optimized for larger wrists. Get up to 31 days in smartwatch mode or up to 58 hours in GPS mode. Variable light intensities and a red safety light give you greater awareness while you train in the dark and can provide convenient illumination when you need it. Strobe mode can even match your running cadence. The ECG app uses sensors to record the electrical signals that control how your heart beats. It analyzes that recording to detect signs of an irregular heart rhythm called atrial fibrillation (AFib). This feature measures your ability to sustain prolonged efforts and combines training data from all your athletic pursuits to help you understand how training impacts your overall endurance. This dynamic measurement uses your VO2 max, short-term/long-term training loads and other factors to gauge your fitness progress beyond just VO2 max. The resilient athletic design features a bright 1.4 inches scratch-resistant sapphire AMOLED display, responsive touchscreen, traditional buttons and 51 millimeter fiber-reinforced polymer case with a titanium bezel and rear cover. The watch is tested to U.S. military standards for thermal, shock and water resistance. Your health and training data should be easy to interpret and provide actionable insight. Begin each day with a customizable morning report, and see a daily summary of health and wellness information. Use the training readiness feature - which looks at a variety of different health metrics to help you maximize your training efficiency and recovery - to prevent burnout. Measure your capability for running uphill, and evaluate your progress over time based on your VO2 max and training history. Get an estimate of what your pace could be for a 5K, 10K, half-marathon and marathon. Plan race-day strategy with GPS-based pace guidance for a selected course or distance. See real-time information on your current and upcoming climbs on downloaded courses. Get your equivalent running pace at the same effort on flat ground or when ascending. From the moment you wake up, get a readiness score based on your sleep quality, recovery, training load and more, so you can determine whether it's a good day to go hard - or take it easy. Get insight, and know whether you're training productively, peaking or strained. Gauge your performance with advanced training metrics such as VO2 max, training load and more. Prevent burnout, and use this data to track and manage your exertion. View your entire week of daily suggested workouts, which adapt after every run or ride. Know how long you need to recover before your next high-effort workout based on your latest training. Prepare for your next race with training tips, personalized daily suggested workouts and more. See how much power you're applying to the trail or road so you can manage effort and fine-tune training. Train for an event, achieve a milestone, or improve your fitness with Garmin Coach training plans for runners and cyclists. This feature automatically detects sport changes between swim, bike and run in multisport activities - so you can focus on the race and let your watch take care of recording splits. Use preloaded activity profiles to get data and insight from your active pursuits. You can now track team sport activities such as soccer, football, racquet sports and more. Track your HIIT workouts, including AMRAP, EMOM, Tabata or custom workouts. Follow animated cardio, strength, yoga and Pilates workouts on the watch screen. Automatically track ascents and descents along with how much time you spend between runs. Measure exercise load when paired with an HRM-Pro Plus chest strap. Record the number of waves surfed, maximum speed reached, distance traveled and more. Create a video of every wave you ride in front of a Surfline camera with Surfline Sessions technology. Use the Surfline widget to see tide, wave height, wind and surf rating for each of the five nearest surf spots. Track the details of your ride with specialized Grit and Flow measurements. Subscribe to Outdoor Maps+ for premium mapping content, such as satellite imagery and enhanced topographic maps, downloaded directly to your watch. Get superior positioning accuracy with multi-band GPS while optimizing battery life. Navigate your next trail with an altimeter, barometer and 3-axis electronic compass. Preloaded TopoActive maps from around the world keep your explorations on track. View run names and difficulty ratings for more than 2,000 preloaded ski resorts worldwide. Get preloaded full-color CourseView maps for more than 43,000 golf courses around the world. Navigate with a quick glance, and see the distance to the next intersection and the trail name. Get at-a-glance awareness for selected POI checkpoints ahead -