RESULTS	Both amino acid mixtures significantly increased ( main effect of time ) fat-free mass ( 727 + / -1186 g , P < 0.01 ) , total body protein ( 719 + / -1703 g , P = 0.02 ) , arms ( 112 + / -183 g , P < 0.01 ) and legs ( 283 + / -534 g , P < 0.01 ) lean mass , and some measures of physical function .\