The transition of tensor fasciae latae and iliotibial band hardness after hip abduction exercise and the effect of vibration stimulation / 体力科学

The aim of this study was to evaluate the transition of the tensor fasciae latae (TFL) and the iliotibial band (ITB) hardness after repetitive hip abduction exercise (RE) and the effect of vibration stimulation immediately after RE. Nine healthy man performed the RE (20 reps×5 sets) and the TFL and the ITB hardness were measured before and after RE. Participants were performed RE by 2 conditions(i.e. with and without vibration stimulation after RE). The results showed that with no vibration condition, hardness of the TFL significantly increased immediately, 15 min, 30 min, and 24 hours and the ITB significantly increased immediately, and 24 hours after RE compared with before RE, respectively. With vibration condition, vibration after RE, both of the TFL and the ITB hardness significantly increased only immediately after compared with before RE. On the other hand, TFL and ITB hardness significantly decreased 15 min, 30 min, and 24 hours compared with immediately after RE. In addition, with vibration condition, TFL and ITB hardness significantly decreased 15 min, 30 min, 24 hours compared with no vibration condition, respectively. This study indicated that the ITB hardness might be increased with excessive activity of TFL, and the vibration stimulation immediately after exercise is effective for decreasing the hardness.

Changes in the sagittal plane spinal alignment at the time of the cross-leg sitting position / 体力科学

<p>Cross-leg sitting is locus posture performed well in Asian area, and a lifestyle and culture are thought to affect it. It is usually essential to cross-leg sitting carried out in the case of Zen meditation to maintain cross-leg sitting locus in a relaxed state to perform locus posture in floor, and to perform it in hip joint flexion of bilateral feet, abduction, and lateral rotation position in the meditation for a long time. The spinal column of cross-leg sitting was intended that aligning it confirmed backbone in lumbar vertebrae being displaced than rest standing position in the kyphosis direction or raising a bearing surface whether aligning it changed into lordotic projection from the lumbar vertebrae kyphosis direction. The thoracic vertebra angle and the lumbar vertebrae angle measured it using SpinalMouse®. We decided to measure a thoracic vertebra angle, a lumbar vertebrae angle when we changed the height of the target rest standing position and the bearing surface of cross-leg sitting. The thoracic vertebra angle did not change by raising the bearing surface of cross-leg sitting, however the lumbar vertebrae angle changed. It showed a significant correlation between hip joint flexion, abduction, an external rotation angles and the change of the lumbar vertebrae angle. Results of this study suggested that lumbar, aligning it changed to lordosis in the high cross-leg sitting thing that we changed. The quantity that aligning it biases into lordosis of the lumbar part is related to the flexion of the hip joint, abduction, external rotation flexibility.</p>