Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, 3-7-30, Habikino, Habikino, Osaka, 583-8555, Japan.
Graduate School of Rehabilitation Science, Osaka Metropolitan University, 3-7-30, Habikino, Habikino, Osaka, 583-8555, Japan.
Sci Rep. 2023 Dec 22;13(1):22943. doi: 10.1038/s41598-023-50275-1.
Ankle plantar flexors play a vital role in the mobility of older adults. The strength and velocity of plantarflexion are critical factors in determining walking speed. Despite reports on how age and sex affect plantarflexion strength, basic information regarding plantarflexion velocity is still lacking. This cross-sectional observational study investigated age-related changes and sex differences in plantarflexion velocity by comparing them with plantarflexion strength. A total of 550 healthy adults were classified into four age groups for each sex: Young (< 40 years old), Middle-aged (40-64 years old), Young-old (65-74 years old), and Older-old (≧ 75 years old). We measured plantarflexion velocity and strength in the long-sitting position using a gyroscope and a hand-held dynamometer, respectively. Two-way analysis of variance revealed no interaction between age and sex for either plantarflexion velocity or strength. Plantarflexion velocity exhibited a significant decline with aging, as did the plantarflexion strength. We found no significant sex differences in plantarflexion velocity in contrast to plantarflexion strength. The results indicated a significant decrease with age and no difference in plantarflexion velocity between males and females characteristic plantarflexion velocity. Understanding the characteristics of plantarflexion velocity could contribute to preventing a decline in mobility in older adults.
踝关节跖屈肌在老年人的活动能力中起着至关重要的作用。跖屈的力量和速度是决定步行速度的关键因素。尽管有关于年龄和性别如何影响跖屈力量的报道，但关于跖屈速度的基本信息仍然缺乏。这项横断面观察性研究通过比较跖屈力量来调查跖屈速度随年龄的变化和性别差异。共有 550 名健康成年人按性别分为四个年龄组：年轻组（<40 岁）、中年组（40-64 岁）、年轻老年组（65-74 岁）和老年老年组（≧75 岁）。我们分别使用陀螺仪和手持测力计在长坐位测量跖屈速度和力量。双因素方差分析显示，跖屈速度和力量在年龄和性别之间没有交互作用。跖屈速度随年龄的增长而显著下降，跖屈力量也是如此。与跖屈力量相比，我们没有发现跖屈速度在性别上有显著差异。结果表明，跖屈速度随年龄的增长而显著下降，男性和女性的跖屈速度没有差异，这是跖屈速度的特征。了解跖屈速度的特点有助于防止老年人活动能力下降。
