Masaki Mitsuhiro, Ikezoe Tome, Fukumoto Yoshihiro, Minami Seigo, Aoyama Junichi, Ibuki Satoko, Kimura Misaka, Ichihashi Noriaki
Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
Department of Physical Therapy, Faculty of Rehabilitation, Kobe Gakuin University, Hyogo, 518 Arise, Ikawadani-cho, Nishi-ku, Kobe, 651-2180, Japan.
Aging Clin Exp Res. 2016 Jun;28(3):429-34. doi: 10.1007/s40520-015-0442-0. Epub 2015 Aug 30.
Age-related change of spinal alignment in the standing position is known to be associated with decreases in walking speed, and alteration in muscle quantity (i.e., muscle mass) and muscle quality (i.e., increases in the amount of intramuscular non-contractile tissue) of lumbar back muscles. Additionally, the lumbar lordosis angle in the standing position is associated with walking speed, independent of lower-extremity muscle strength, in elderly individuals. However, it is unclear whether spinal alignment in the standing position is associated with walking speed in the elderly, independent of trunk muscle quantity and quality. The present study investigated the association of usual and maximum walking speed with age, sagittal spinal alignment in the standing position, muscle quantity measured as thickness, and quality measured as echo intensity of lumbar muscles in 35 middle-aged and elderly women.
Sagittal spinal alignment in the standing position (thoracic kyphosis, lumbar lordosis, and sacral anterior inclination angle) using a spinal mouse, and muscle thickness and echo intensity of the lumbar muscles (erector spinae, psoas major, and lumbar multifidus) using an ultrasound imaging device were also measured.
Stepwise regression analysis showed that only age was a significant determinant of usual walking speed. The thickness of the lumbar erector spinae muscle was a significant, independent determinant of maximal walking speed.
The results of this study suggest that a decrease in maximal walking speed is associated with the decrease in lumbar erector spinae muscles thickness rather than spinal alignment in the standing position in middle-aged and elderly women.
已知站立位脊柱排列的年龄相关性变化与步行速度降低以及腰背部肌肉的肌肉量（即肌肉质量）和肌肉质量（即肌内非收缩性组织量增加）改变有关。此外，在老年人中，站立位腰椎前凸角与步行速度相关，且独立于下肢肌肉力量。然而，尚不清楚站立位脊柱排列是否独立于躯干肌肉量和质量与老年人的步行速度相关。本研究调查了35名中老年女性的日常和最大步行速度与年龄、站立位矢状面脊柱排列、以厚度衡量的肌肉量以及以腰大肌回声强度衡量的质量之间的关联。
使用脊柱鼠标测量站立位矢状面脊柱排列（胸椎后凸、腰椎前凸和骶骨前倾角度），并使用超声成像设备测量腰大肌（竖脊肌、腰大肌和腰多裂肌）的肌肉厚度和回声强度。
逐步回归分析表明，只有年龄是日常步行速度的显著决定因素。竖脊肌厚度是最大步行速度的显著独立决定因素。
本研究结果表明，最大步行速度降低与中老年女性竖脊肌厚度降低有关，而非与站立位脊柱排列有关。
