Participants were randomly assigned , double blind , to receive twice-daily supplements of isolated whey ( 27 g/supplement ) or soy ( 26 g/supplement ) , providing a total protein intake of 1.3 0.1 g / ( kg d ) , or isoenergetic carbohydrate ( 25 g maltodextrin/supplement ) resulting in a total protein intake of 0.7 0.1 g / ( kg d ) .