Praktické

Index telesného tuku (BAI)

Body Adiposity Index (BAI)

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Výška

What is Body Adiposity Index?

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The Body Adiposity Index (BAI) estimates body fat % from hip circumference and height without needing weight. Proposed 2011 as an alternative to BMI.

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Vzorec

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f(x)BAI = (Hip circumference (cm) / (Height (m))^1.5) − 18; Estimates % body fat without scale (alternative to BMI)

Variable Legend

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Symbol	Meno	Jednotka	Popis
Hip	Hip circumference	Centimeters	—
Height	Height	Meters	—
BAI	Body adiposity index	Percentage body fat estimate	—

How to Body Adiposity Index

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1BAI = Hip (cm) / Height (m)^1.5 − 18
2Healthy male: 8–20%; Female: 21–33%
3Validated against DXA scan measurements
4No weight scale needed — useful in field settings

Worked Examples

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Example 1

Given:Hip 100cm, height 1.75m

Výsledok:BAI = 100/1.75^1.5 − 18 = 25.3%

Real-World Applications

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Cardiovascular risk assessment

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Metabolic syndrome screening

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Body composition estimate without scale

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Population health studies

BAI Categories

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Category	Men	Women
Athletes	6–13%	14–20%
Fitness	14–17%	21–24%
Average	18–24%	25–31%
Obese	≥25%	≥32%

Frequently Asked Questions

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Why use BAI instead of BMI?

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

What's healthy BAI?

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

How do I measure hip circumference?

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

References

›Body Adiposity Index — Wikipedia

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Reviewed October 2026

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