“…The fact that the center of gravity was less disturbed over Ingersoll, Stone, & Krause, 2002). Many studies have predicted the elderly's risk of falling by analyzing COP parameters (Piirtola & Era, 2006;Pajala et al, 2008), and validated the effectiveness of balance training programs (Crilly, Willems, Trenholm, Hayes, & DelaquerriereRichardson, 1989;Judge, Lindsey, Underwood, & Winsemius, 1993). In the present study, we found significant differences in AP COP, ML COP, total COP, and COP 90 area between before and after the 8-week training (p < .05), which means that the movement trajectories of the older adults' center of gravity significantly declined.…”