ably ▁accurate ▁for ▁meas uring ▁groups , ▁of ▁limited ▁accuracy ▁for ▁tracking ▁body ▁composition ▁in ▁an ▁individual ▁over ▁a ▁period ▁of ▁time , ▁but ▁is ▁not ▁considered ▁sufficiently ▁precise ▁for ▁recording ▁of ▁single ▁measurements ▁of ▁individuals . ▁ ▁Cons umer ▁grade ▁devices ▁for ▁meas uring ▁B IA ▁have ▁not ▁been ▁found ▁to ▁be ▁sufficiently ▁accurate ▁for ▁single ▁measurement ▁use , ▁and ▁are ▁better ▁su ited ▁for ▁use ▁to ▁measure ▁changes ▁in ▁body ▁composition ▁over ▁time ▁for ▁individuals . ▁Two - elect ro de ▁foot - to - foot ▁measurement ▁is ▁less ▁accurate ▁than ▁ 4 - elect ro de ▁( fe et , ▁hands ) ▁and ▁eight - elect ro de ▁measurement . ▁ ▁Results ▁for ▁some ▁four - ▁and ▁eight - elect ro de ▁instruments ▁tested ▁found ▁poor ▁limits ▁of ▁agreement ▁and ▁in ▁some ▁cases ▁system atic ▁bias ▁in ▁estimation ▁of ▁vis cer al ▁fat ▁percentage , ▁but ▁good ▁accuracy ▁in ▁the ▁prediction ▁of ▁rest ing ▁energy ▁exp end iture ▁( REE ) ▁when ▁compared ▁with ▁more ▁accurate ▁whole - body ▁magnetic ▁reson ance ▁imag ing ▁( M RI ) ▁and ▁dual - energy ▁X - ray ▁absor pt i ometry ▁( DEX A ). ▁ ▁The ▁use ▁of ▁multiple ▁frequencies ▁in ▁specific ▁B IA ▁devices ▁that ▁util ize ▁eight ▁electro des ▁has ▁been ▁found ▁to ▁have ▁a ▁ 9 4 % ▁correlation ▁method ▁with ▁DE X A ▁when ▁meas uring ▁body ▁fat ▁percentage . ▁The ▁correlation ▁with ▁DE X A ▁is ▁as ▁high ▁as ▁ 9 9 % ▁when ▁meas uring