BRI (Body roundness index) meri okroglost telesa in je ena od alternativ BMI. Formula za izračun BRI bolje upošteva obliko telesa. Višja kot je vrednost, bolj zaobljena je oseba. Povprečni BRI je 5.
BRI se izračuna z uporabo višine in obsega pasu, kot sledi:
Bosy-Westphal A, et al. 2013. Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model https://pmc.ncbi.nlm.nih.gov/articles/PMC3692604/
Wikipedia: Body roundness index https://en.wikipedia.org/wiki/Body_roundness_index
Xiaoqian Zhang, Ning Ma, Qiushi Lin et al. 2024. Body Roundness Index and All-Cause Mortality Among US Adults https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2819558