Body fat percentage is the proportion of fat to the total body weight. It's a better indicator of fitness level than BMI alone, as it distinguishes between muscle and fat mass.

Measurement Methods:

• US Navy Method: Uses circumference measurements (waist, neck, hips). Most commonly used and reasonably accurate.
• YMCA Method: Simplified approach using waist measurement and weight. Quick but less accurate.

Measurement Tips:

• Measure at the same time of day, preferably morning
• Use a flexible measuring tape
• Don't compress the skin, tape should be snug but not tight
• Take measurements on bare skin for accuracy
• Take multiple measurements and use the average