@article{oai:nagoya.repo.nii.ac.jp:02005182,
 author = {山本, 裕二 and YAMAMOTO, Yuji},
 issue = {1},
 journal = {総合保健体育科学, Nagoya Journal of Health, Physical Fitness & Sports},
 month = {Mar},
 note = {Dexterity has an important role in human movement, and can be considered the efficiency, economy, or effectiveness of movement. Some indices of dexterity have been proposed from the perspective of the kinematics of movement. This study proposed four indices to quantify the fluency of the trajectories in the state space of striking movements from the dynamical perspective. The four indices were mean jerk, mean deviation from a circle, mean change in radius, and standard deviation of the curvature. Striking movements in tennis were analyzed from the perspective of dynamical systems, and the four indices were applied to these trajectories in state space. The striking movements consisted of repeated forehand or backhand strokes by two intermediate players, repeated forehand or backhand strokes before and after training by one beginner, random forehand and backhand strokes by the intermediate players, and repeated forhand and backhand strokes by the beginner. The results suggest that the mean changes in the radius and standard deviation of curvature are better indices for quantifying fluency.},
 pages = {77--84},
 title = {動きの「滑らかさ」の評価に向けて},
 volume = {26},
 year = {2003}
}