Another reason could be that our inclusion was not sensitive enough to detect fall-prone elderly who had balance deficits. We recruited subjects that has more than 3 fall risk factors and/or scored less than 45 on task completion score of FEMBAF. The average task completion score was 44 and average risk factor was 9.1.Eight subject had scored over 45 on task completion but had over 3 fall risk factors. As four fall risk factors in FEMBAF did not directly relate to postural control some elder may not have balance problem. This explained why some subjects scored quite high on the BBS. The BBS score itself has the ceiling effect as well. Thais led to small room of improvement. Therefore, for future study it will be better to recruit participants who have the total BBS score less than 45.