Abstract
A continuous rolling motion around a body axis to switch the front side of a body facing upside to downside or vice versa when performing a double-leg circle on a pommel horse has been presented as another skill instead of conventional skill of twisting the hips. An analysis was made of the time history data of spatial coordinates of several selected points of a body acquired with a motion capture presented in a previous paper for three gymnasts, who are different in the amount of rolling motion training from well-trained to no-trained. In comparison of the rolling motion with the twist of the hips, it is shown that the rolling motion has an advantage to keep a body higher and straighter with less bend at the waist, giving more impressive performance.
