Araki Kojiro, Ikezoe Tome, Malinowska Katarzyna, Masaki Mitsuhiro, Okita Yusuke, Fukumoto Yoshihiro, Kimura Misaka, Watanabe Yuya, Kita Kiyoshi, Tsuboyama Tadao, Ichihashi Noriaki
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Shogoin Kawaramachi, Sakyo-ku, Kyoto 606-8507, Japan.
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Shogoin Kawaramachi, Sakyo-ku, Kyoto 606-8507, Japan.
Arch Gerontol Geriatr. 2016 Sep-Oct;66:205-10. doi: 10.1016/j.archger.2016.06.005. Epub 2016 Jun 17.
Stepping-up motion is challenging task for elderly people in daily life. The present study investigated the relationship between the load pattern during stepping-up motion at maximum speed and physical function in elderly women.
The subjects comprised 109 community-dwelling elderly women (age 72.5±5.3years). The load pattern (maximum load, rate of load production, and stepping-up time) during ascending a 30cm step at maximum speed was measured, using a step up platform that measures the load at the lower and upper level. Physical function, including hip and knee extensor strength and performance on the vertical jump test, one-legged stance test, timed "Up & Go" (TUG) test, and stepping test were measured.
Pearson's correlation analysis showed that stepping-up time was correlated with the maximum load at the lower level (r=-0.51), but not with the maximum load at the upper level. A multiple regression analysis showed that hip extensor strength and performance on the vertical jump, TUG, and stepping tests were significant determinants of the load pattern during stepping-up motion in the elderly women.
Our study revealed that rapid stepping-up ability was more closely related to the maximum load during push-off at the lower level rather than that during weight loading on the upper level, and that the load pattern during stepping-up motion in elderly women was associated with various physical functions such as the hip extensor strength, leg muscle power, dynamic balance function, and agility.
上台阶动作对老年人来说是日常生活中的一项具有挑战性的任务。本研究调查了老年女性以最大速度上台阶动作时的负荷模式与身体功能之间的关系。
研究对象包括109名居住在社区的老年女性（年龄72.5±5.3岁）。使用可测量上下两级负荷的上台阶平台，测量她们以最大速度登上30厘米高台阶时的负荷模式（最大负荷、负荷产生速率和上台阶时间）。测量身体功能，包括髋部和膝部伸肌力量以及垂直跳测试、单腿站立测试、定时起立行走（TUG）测试和上台阶测试的表现。
Pearson相关分析表明，上台阶时间与下级的最大负荷相关（r=-0.51），但与上级的最大负荷无关。多元回归分析表明，髋部伸肌力量以及垂直跳、TUG和上台阶测试的表现是老年女性上台阶动作时负荷模式的重要决定因素。
我们的研究表明，快速上台阶能力与下级蹬离时的最大负荷而非上级负重时的最大负荷关系更为密切，并且老年女性上台阶动作时的负荷模式与多种身体功能相关，如髋部伸肌力量、腿部肌肉力量、动态平衡功能和敏捷性。
