Generally, a healthy body is defined through height and weight ranges, muscle to fat ratio and body mass level. A normal body is the healthiest body and what is a healthy body deviate from person to person. It is best determined by comparing weight, height, fitness, body fat ratio and consumption of food. Devices determining total weight, muscle mass, the percent and amount of water, body fat, and even bone mass using bio-electrical impedance analysis are beneficial for proper check and balance of the body requirements.