The Philips health watch can recognize walking, running, and cycling activities. For other activities you can measure your calorie burn with the continuous heart rate tracker.
If you want to start your activity manually, you can tap the 'play icon' on the walking, running or cycling screens in activity mode. You can stop or pause the activity when desired. During your activity you can see information about the activity: the activity duration, your current heart rate, heart rate zone, number of calories burned, and steps (in case of walking or running).