Elderly care has become one of the most important subjects in Taiwan and "frailty syndrome" are the most common problems among the elderly. In view of this trend, Taipei Veteran Memorial Hospital imported POWER rehabilitation from Japan in 2008. While showing significant clinical benefits, investigators have found that the system still has certain limitations (e.g. high cost, requires large space, patients must commute to the center, lacks real-time objective feedback , boring routines makes staying power to motivate patients for long term rehabilitation programs.)