Swarovski Activity Crystal displays your total calories burned, which includes:
Calories related to your physical activities like walking, running, swimming, etc.
The basal metabolic rate (BMR) of energy needed just to keep your body alive. Even if you have not performed a lot of activity in a day, you will still burn calories related to your BMR, which can be a surprisingly large number - more than 1,500 calories for many users. Swarovski Activity Crystal’s calorie estimate is based on the most updated medical research on energy expenditure.