The Fits are a proprietary indicator of Aplifit, which quantitatively measures the user's performance in class. It is a value not comparable to any unit of measure, although it can be compared to itself (to see one's own evolution) and compared to other subscribers. It would be akin to a caloric amount or a distance traveled, but being a unique value of Aplifit with a relativization factor for each user based on their characteristics. Unlike other systems, in this calculation Aplifit takes into account the specific anthropometric and physiological characteristics of each user to calculate the number of Fits generated. It is not a generic formula but considers the unique characteristics of each user.