The body fat percentage is a measure of fitness level, since it is the only body measurement which directly calculates a person's relative body composition without regard to height or weight.

Muscle content is about 4% to 6% of the body weight removed from non-fatty substances, and muscle mass is the proportion of muscle in the body.

Body water rate refers to the percentage of body water in body weight, and there is a very close relationship between body water rate and muscle rate. This indicator can reflect whether the weight loss method is correct. If the body water rate drops, it will not only damage the health, but also increase the body fat rate.

BMI are generally regarded as a satisfactory tool for measuring whether individuals are underweight, overweight, orobesewith various exceptions, such as athletes, children, the elderly, and the infirm.

Bone mass is used to represent the health of the bones. The bone mass of the human body is different at different ages. To increase the bone mass, not only calcium, but also collagen is needed. The strength of human bones is closely related to the amount of bone mass.

This index measures deep abdominal fat, crucial for health assessment. It's linked to conditions like heart disease and diabetes, and is unaffected by height or weight. Regular monitoring and lifestyle adjustments like better diet and exercise can help reduce visceral fat, improving overall health.