- 著者
- Toshiyuki TAKAHASHI Osamu AOKI Atsushi HIRAGA
- 出版者
- Japanese Society of Equine Science
- 雑誌
- Journal of Equine Science (ISSN:13403516)
- 巻号頁・発行日
- vol.18, no.2, pp.47-53, 2007 (Released:2007-07-11)
- 参考文献数
- 9
- 被引用文献数
- 1 2
The purpose of this study was to describe the characteristics of fast race horses by analyzing the running form of Deep Impact, the undefeated Japanese triple crown winner in 2005. A high-speed video data of the Kikuka Syo race (Japanese St. Leger, JPN G1, 3,000 m, turf) was taken at a rate of 250 frames/sec. The high-speed video system was set in a left lateral position about 100 m before the finishing post with a field view width of about 16 m. The speed of Deep Impact, 17.8 m/sec, was the fastest of all horses measured (average 16.1 m/sec), the stride frequency, 2.36 strides/sec, was the third largest (average 2.28 strides/sec), and the stride length, 7.54 m, was the longest (average 7.08 m). The diagonal and airborne step lengths of Deep Impact were longer than the average values. The overlap time of Deep Impact was shorter than the average value. The ratio of overlap time to stride duration of Deep Impact was 8.5 %, whereas the average value was 16.9 %. A shorter overlap time was also observed on a common characteristic of Secretariat, the famous elite race horse in USA and correlated to running speed. Thus, these characteristics may be related to effective running form in elite horses.
- 著者
- Osamu Aoki Nobuhiro Tsumura Aiko Kimura Soh Okuyama Satoshi Takikawa Soichiro Hirata
- 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.21, no.2, pp.113-119, 2009 (Released:2009-07-18)
- 参考文献数
- 28
- 被引用文献数
- 19 36
[Purpose] The purpose of this study was to assess the effects of home-based knee stretching exercises on knee range of motion (ROM) and gait speed in patients with knee osteoarthritis awaiting total knee arthroplasty. [Subjects] Thirty-six patients with severe knee osteoarthritis were randomly allocated to stretching (n=17) and control (n=19) groups. [Method] The subjects in the stretching group were instructed to perform home-based knee stretching exercises once a day for about 80 days, whereas the subjects in the control group were told to maintain their current level of physical activity. Outcomes assessed percentage changes in the total range of knee ROM in the supine position (S-ROM), pain, gait speed and knee ROM during gait (G-ROM). [Results] The stretching group showed significantly greater improvement in S-ROM, gait speed and G-ROM than the control group (control vs stretching; S-ROM, 0.4 ± 8.6% vs 9.5 ± 16.2%; gait speed, 1.6 ± 11.4% vs 11.6 ± 10.7%; G-ROM, 0.6 ± 15.2% vs 14.2 ± 14.6%; p<0.05 for all). Pain was significantly decreased in the stretching group compared to the control group (median values: -15.6% and 6.5%, p<0.01).