Body fat mass is the weight of fat in your body. Body fat fulfills important functions, such as keeping your body warm or protecting your organs.
Muscle mass is the predicted weight of muscle in your body. It includes skeletal muscle, smooth muscle and the water in your muscles. Muscles act as the engine for your energy expenditure.
Bone mass is the estimated weight of bone mineral in your body. Healthy bones and a healthy bone mass are important for your body's strength, movement and load.
The body water percentage is the amount of fluid in the body, expressed as a percentage of the total body weight. Water plays an important role in various body processes and is found in every cell, tissue and organ.