physical function in the elderly. Previously, we conducted a randomized controlled trial to determine the effect of WBV exercise on physical function in postmenopausal osteoporotic women treated with alendronate5 and found that WBV exercise improved static body balance (one-leg standing time and tandem standing time) and walking velocity, but not dynamic body balance (Timed Up and Go [TUG]) and muscle power (chair-rising time) compared with nonexercising controls. We also conducted another randomized controlled trial to compare the effect of a one-leg standing exercise (static body balance training) and chair-rising exercise (muscle power training) on physical function in patients with locomotive disorders6 and found that the one-leg standing exercise improved static body balance while the chair-rising exercise was useful for improving walking velocity, dynamic body balance, and muscle power. Squat training, which mimics chair-rising training, may train the