For a small cost, body composition scans are available at selected PureGym, which can measure different metrics, including your bodyweight, BMI, and muscle mass to give you a broad overview of your health. Your body weight can fluctuate throughout the day based on a variety of factors so if you want to track your weight, you will want to consider taking a reading at the same time of the day with the same scales, whether that’s in the gym or one at home.