11
Body Composition
Two
Compartment
Three
Compartment
Four
Compartment Six Compartment
• Fat mass
• Fat-f ree
mass (water,
protein, bone
mineral, non-
bone mineral)
• Fat mass
• Lean mass
(water,
protein)
• Bone mass
• Fat mass
• Total body
water
• Protein
• Bone
mineral
• Fat mass
• Total body water
• Bone mineral
• Non-bone mineral
• Protein
• Glycogen
Measurements
BMI in kilograms per meters squared (kg/m
2
)
a
Normal
Weight
18.5–24.9
Overweight
25.0–29.9
Class I
Obesity
30.0–34.9
Class II
Obesity
35.0–39.9
Class III
Obesity
≥40
Obesity Classification: WC
b
Abdominal Obesity – Women
≥35 inches
≥88 centimeters
Abdominal Obesity – Men
≥40 inches
≥102 centimeters
Classification of Percent Body Fat in Adults as Assessed by DXA
Women Men
Essential fat <15% <10%
Athlete 15–19% 10–14%
Fitness 20–24% 15–19%
Acceptable 25–29% 20–24%
Pre-obesity 30–34% 25–29%
Obesity ≥35% ≥30%
