At @ and @ months , respectively , mean ( SD ) values for strength ( presented as proportion of maximum strength score evaluated using manual muscle testing ) was @ % ( @ % ) and @ % ( @ % ) , @-minute-walk distance ( as percent-predicted ) was @ % ( @ % ) and @ % ( @ % ) , and SF-@ Physical Function score ( as percent-predicted ) was @ % ( @ % ) and @ % ( @ % ) .