Nakamura Masatoshi, Kiyono Ryosuke, Sato Shigeru, Yahata Kaoru, Fukaya Taizan, Nishishita Satoru, Konrad Andreas
Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata 950-3198, Japan.
Department of Physical Therapy, Niigata University of Health and Welfare, Niigata 950-3198, Japan.
Healthcare (Basel). 2021 Jan 15;9(1):80. doi: 10.3390/healthcare9010080.
Previous studies suggest that the capacity for rapid force production of ankle plantar flexors is essential for the prevention of falls in the elderly. In healthy young adults, there were significant associations between rate of force development and muscle stiffness measured by shear wave elastography. However, there has been no study investigating the association of rate of force development with shear elastic modulus in older adults.
The muscle strength and shear elastic modulus of the medial gastrocnemius muscle in both legs were measured in 17 elderly men and 10 elderly women (mean ± SD; 70.7 ± 4.1 years; 160.6 ± 8.0 cm; 58.7 ± 9.5 kg). We investigated the rate of force development of plantar flexors and shear elastic modulus of medial gastrocnemius muscle using by shear wave elastography.
Our results showed that there were no significant associations between normalized rate of force development and shear elastic modulus of medial gastrocnemius muscle.
This suggests that the capacity of rapid force production could be related not to muscle stiffness of the medial gastrocnemius muscle, but to neuromuscular function in older individuals.
先前的研究表明，踝关节跖屈肌快速产生力量的能力对于预防老年人跌倒至关重要。在健康的年轻成年人中，通过剪切波弹性成像测量的力量发展速率与肌肉僵硬度之间存在显著关联。然而，尚无研究调查老年人中力量发展速率与剪切弹性模量之间的关联。
测量了17名老年男性和10名老年女性（平均±标准差；70.7±4.1岁；160.6±8.0厘米；58.7±9.5千克）双腿腓肠肌内侧头的肌肉力量和剪切弹性模量。我们使用剪切波弹性成像研究了跖屈肌的力量发展速率和腓肠肌内侧头的剪切弹性模量。
我们的结果表明，标准化的力量发展速率与腓肠肌内侧头的剪切弹性模量之间无显著关联。
这表明快速产生力量的能力可能与腓肠肌内侧头的肌肉僵硬度无关，而与老年人的神经肌肉功能有关。
