@article{oai:nagoya.repo.nii.ac.jp:02005897,
 author = {岡本, 敦 and OKAMOTO, Atsushi and 桜井, 伸二 and SAKURAI, Shinji and 池上, 康男 and IKEGAMI, Yasuo and 矢部, 京之助 and YABE, Kyonosuke},
 issue = {1},
 journal = {総合保健体育科学, Nagoya Journal of Health, Physical Fitness & Sports},
 month = {Mar},
 note = {The purpose of this study was to describe the kinetic parameters at release of the double salto backward tucked to dismount on the horizontal bar. The subject in this study was one male university gymnast. His body weight and height was 57.0 kg and 1.67 m, respectively. He performed the double salto backward tucked to dismount after three rotations of the giant swing backward on the horizontal bar. These motions were filmed from the side with a high-speed camera of 33 frames a second. The body landmarks digitized from the films represented the endpoints of each of the segments. An eight-segment mathematical model of the body consisting of the head, trunk, upper arm, forearm, hand, thigh, shank and foot was used to obtain kinetic parameters. Velocity of the C.M. angular momentum about a transverse axis trough the C.M. and mechanical energy were calculated for whole body. Mechanical power at each joint between adjacent segments was also calculated and total power was obtained by summing the power at each joint. Segment masses and center of mass were calculated from the data of Dempster (1955) and segment moments of inertia were obtained from the date of Widule (1966). Height of the C.M. at release was 2.30 m from the landing mat. Release angle of the C.M. was 70.5 deg and then velocity of the C.M. was 5.14 m/s. Maximal height of the C.M. was 3.50 m from the landing mat in the airbone phase. Angular momentum was 44.4 kgm2/s at release. Mechanical power was generated by the hip joint flexion and shoulder joint extension in the upswing before release. These motions increased mechanical energy and angular momentum.},
 pages = {67--73},
 title = {鉄棒の後方かかえ込み2回宙返り下りの離手時の力学量について},
 volume = {11},
 year = {1988}
}