March 2012; Vol. 1, No. 1: Pages 10-13
Kinetic features of sliding walk in Nogaku
Shinsuke Yoshioka, Kazuhiro Ueda, Yui Morita, Toshio Morita, Senshi Fukashiro
Abstract
Objectives: To investigate the kinetic features of sliding walk in Nogaku. Design: Biomechanical motion analysis study. Methods: Three male Nogaku actors participated in the experiment. Each actor performed the sliding walk on an 8-m walking track three times. To obtain the kinematics and kinetics, a three-dimensional optical motion capture system and two force platforms were used. The angles, moments, powers and work of each of the three lower extremity joints (i.e., hip, knee, and ankle joints) in the sagittal plane were calculated using an inverse dynamics method. Results: The kinematic and kinetic results were successfully obtained. In the results for the vertical ground reaction force, one cycle could be clearly divided into two phases (stance and foot-sliding phases). The push force during the foot-sliding phase reached 53 N on average. The energy dissipation by the push force (friction energy dissipation) reached 14 J, which was comparable to the hip joint work (19.7 J). Conclusions: The following three findings were revealed: (1) The push force during the foot-sliding phase was large (average 53 N). (2) The role of the hip joint was to propel the actor's body forward. The role of the knee and ankle joints was to keep the center of gravity of the actor's body low. (3) The differences in kinetic results among the actors were larger than the differences in kinematic results.
Received Febrary 9, 2012; accepted March 1, 2012