Body Adiposity Index

BMI doesn't distinguish fat from muscle. BAI uses hip circumference (fat-specific). Neither perfect: BAI better for lean populations; DEXA scan gold standard.

Women: 21–32%. Men: 13–25%. Higher = higher visceral fat risk. But BAI underestimates fat in obese populations; use multiple measures.

Around fullest part of hips/buttocks (standing, feet together, relaxed). Slight compression, not tight. Measure 3 times, average. Small error = big impact on BAI.