Association between rapid force production by the plantar flexors and balance performance in elderly men and women.
Association between rapid force production by the plantar flexors and balance performance in elderly men and women.
复制标题
足底屈肌快速产生的力量与老年男女平衡表现之间的关联。
DOI：
10.1007/s11357-016-9949-3
复制
发表时间：
2016-12
期刊：
影响因子：
--
通讯作者：
Akagi R
中科院分区：
文献类型：
--
作者：
Ema R;Saito M;Ohki S;Takayama H;Yamada Y;Akagi R
跖屈强度和平衡能力被认为是避免福尔斯的关键。然而，在老年人群中，这两个因素之间没有明确的关系。本研究旨在探讨老年男性和女性的跖屈力量和平衡能力之间的关系。年龄在65岁以上的43名男性和35名女性尽可能快速和用力地进行等长跖屈。根据时间-扭矩曲线，确定从收缩开始的30、50、100、150和200 ms的时间间隔中的扭矩发展速率，并归一化为峰值扭矩。此外，计算单腿站立期间的压力位移中心，并将其标准化为身高。当数据在性别上崩溃时，扭矩发展的标准化速率与压力位移的标准化中心呈负相关，除了200 ms的时间间隔。按性别，无论时间间隔，有一个负相关的扭矩发展率和压力位移的标准化中心之间的老年男性，但不是在老年女性。在合并或单独数据中，峰值扭矩和标准化压力位移中心之间没有相关性。研究结果表明，快速生产力的能力，而不是最大的力量生产的跖屈是重要的平衡能力在老年男性，但这种能力可能是不相关的老年女性。
Plantar flexion strength and balance ability are considered to be crucial for avoiding falls. However, no clear relationship has been established between these two factors in elderly population. This study aimed to examine the association between plantar flexion strength and balance performance in elderly men and women. Forty-three men and 35 women aged over 65 years performed isometric plantar flexion as fast and hard as possible. From the time-torque curve, the rate of torque development in time intervals of 30, 50, 100, 150, and 200 ms from the onset of contraction was determined and normalized to peak torque. In addition, the center of pressure displacement during single-leg standing was calculated and normalized to height. When the data were collapsed over sexes, the normalized rate of torque development was negatively correlated with the normalized center of pressure displacement, except for the time interval of 200 ms. By sex, regardless of the time interval, there was a negative correlation between the normalized rate of torque development and the normalized center of pressure displacement in the elderly men but not in the elderly women. No correlation was seen between the peak torque and normalized center of pressure displacement in either pooled or separated data. The findings suggest that the capability of rapid force production rather than maximal force production of the plantar flexion is important for balance ability in elderly men, but this capability may not be relevant in elderly women.