Running, cycling, swimming, walking! I used this watch for triathlons until I upgraded. Still works great, minor exterior flaws. Some info from the site: GPS Running Watch with Multisport Features and Wrist-based Heart Rate Measures heart rate at the wrist¹ so you can run freer on race day Provides advanced dynamics² for running, cycling and swimming7, including ground contact time balance, stride length, vertical ratio and more Offers VO2 max estimate, lactate threshold³, race predictor and recovery advisor Connected features4: smart notifications, automatic uploads to Garmin Connect™, live tracking and more Customize with free watch faces, apps and more from our Connect IQ™ store