Body Mass Index (BMI) - A body mass index is often the measurement of choice for general physicians. This measurement only takes into consideration an individual's height and weight. Although used in many clinical settings, this calculation may not be optimal when determining composition as it does not consider lean muscle tissue.

Resting Metabolic Rate (RMR) - The amount of calories being used at rest in a neutrally temperate environment. Although a rough estimation, using an equation requiring age, sex, height, and weight gives the performance enhancement specialist a good estimation as to the amount of calories an individual is utilizing in a rested state.