著者

Masatoshi Nakamura Tome Ikezoe Satoru Nishishita Hiroki Tanaka Jun Umehara Noriaki Ichihashi

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.8, no.3, pp.113-116, 2019-05-25 (Released:2019-05-18)

参考文献数

24

被引用文献数

9 16

---

Static stretching (SS) is widely used to decrease and retain the passive stiffness of the muscle-tendon unit in clinical and athletic settings. It is important to consider the minimum SS duration required to decrease the passive stiffness of the hamstring, from the perspective of injury prevention of the hamstring muscle. The purpose of this study was to investigate the time course of the effect of static stretching (SS) on passive stiffness of the hamstring and to clarify the minimum SS duration required to decrease the passive stiffness. Fifteen healthy males participated in this study. Fifteen healthy and non-athlete male volunteers participated in this study. SS of 60-s session was performed for five sessions with a 30-s rest between sessions. Passive stiffness was measured prior to SS (PRE) and immediately after each SS session to determine the minimum SS duration required to decrease the passive stiffness. The passive stiffness was calculated as the slope of the torque-angle curve corresponding to 50% of the final angle (Nm/°). Passive stiffness after 180, 240, and 300 s of SS was significantly lower than that at PRE. Our results showed that SS for >180 s is recommended to decrease the passive stiffness of the hamstring muscle.

著者

Tome Ikezoe Yasuyoshi Asakawa Akimitsu Tsutou

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.15, no.2, pp.75-79, 2003 (Released:2004-01-16)

参考文献数

25

被引用文献数

18 30

---

This study was undertaken to determine the relationship between quadriceps strength and balance to falls of institutionalized elderly people. The subjects comprised 25 elderly women aged 75.3 ± 3.4 years. The values of the postural sway in two standing positions, functional reach test, and quadriceps strength were compared between two groups of elderly adults, those with or without a history of fall. Quadriceps strength was measured using isometric contraction of the knee extension. There were no significant differences between the two groups in the postural sway in the two standing positions and the functional reach test. Quadriceps strength in the non-fall group was, however, significantly higher than that in the fall group (1.48 Nm/kg vs. 1.08 Nm/kg, p<0.01). The discriminating criterion for muscle strength between the two groups was 1.28 Nm/kg, with an apparent error rate of 24.8%. These findings suggest that (1) the degree of quadriceps strength may be a useful indicator for the prospect of fall in institutionalized elderly people, and (2) quadriceps strength should be maintained at least more than 1.28 Nm/kg to prevent fall.