JaLCDOI 10.18926/AMO/32290
フルテキストURL fulltext.pdf
著者 Kawabata, Yasuto| Senda, Masuo| Oka, Takahiro| Yagata, Yukihisa| Takahara, Yasuhiro| Nagashima, Hiroaki| Inoue, Hajime|
抄録 <p>In order to examine fatigue of the knee flexor and extensor muscles and to investigate the characteristics of muscular fatigue in different sports, a Cybex machine was used to measure muscle fatigue and recovery during isokinetic knee flexion and extension. Eighteen baseball players, 12 soccer players and 13 marathon runners were studied. Each subject was tested in the sitting position and made to perform 50 consecutive right knee bends and stretches at maximum strength. This was done 3 times with an interval of 10 min between each series. The peak torque to body weight ratio and the fatigue rate were determined in each case. In all subjects, the peak torque to body weight ratio was higher for extensors than flexors. Over the 3 trials, the fatigue rate of extensors showed little change, while that of flexors had a tendency to increase. In each subject, knee extensors showed a high fatigue rate but a quick recovery, while knee flexors showed a low fatigue rate but a slow recovery. As the marathon runners had the smallest fatigue rates for both flexors and extensors, we concluded that marathon runners had more stamina than baseball players and soccer players.</p>
キーワード knee flexor and extensor muscle fatigue Cybex machine
Amo Type Article
発行日 2000-04
出版物タイトル Acta Medica Okayama
54巻
2号
出版者 Okayama University Medical School
開始ページ 85
終了ページ 90
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 10806529
Web of Sience KeyUT 000086735900005
JaLCDOI 10.18926/AMO/31617
フルテキストURL fulltext.pdf
著者 Senda, Masuo| Takahara, Yasuhiro| Yagata, Yukihisa| Yamamoto, Kazushi| Nagashima, Hiroaki| Tukiyama, Hisashi| Inoue, Hajime|
抄録 <p>The aim of this study was to investigate the relationship between the strength of the foot muscles that control the toes and disorders such as shin splint. In order to this, we designed and built a toe dynamometer to compare the muscle power exerted through the toes in top female marathon runners and age-matched women not involved in sports. The subjects were 12 top-level female marathon runners (Group A) and 37 student nurses who were not involved in sports (Group B). We devised a dynamometer to measure the total power exerted by the flexor muscles of the 5 toes of a single foot (total flexor power) and the combined power of the abductors of the big (1st) and little (5th) toes (abductor power). In Group A, the total flexor power was 14.3 +/- 5.3 kg in the right foot and 15.4 +/- 4.7 kg in the left foot. The abductor power was 1.9 +/- 1.8 kg in the right foot and 2.2 +/- 1.9 kg in the left foot. In Group B, total flexor power was 18.3 +/- 6.7 kg in the right foot, while the abductor power was 1.9 +/- 1.7 kg. The subjects from Group A with an arch index &#60; 1.0 (n = 8) or &#62; 1.0 (n = 4) were respectively classified as Group I and Group II. In Group I, total flexor power was 14.9 +/- 5.3 kg (right) and 15.5 +/- 5.2 kg (left), while the abductor power was 2.6 +/- 1.9 kg (right), and 3.1 +/- 1.7 kg (left). In Group II, the total flexor power was 13.2 +/- 5.8 kg (right) and 15.1 +/- 4.2 kg (left), while the abductor power was 0.7 +/- 0.6 kg (right) and 0.3 +/- 0.2 kg (left). The abductor power of toes was significantly lower in Group II than in Group I. The incidence of posteromedial shin pain was higher in Group II (75.0%) than in Group I (12.5%).</p>
キーワード toe muscle power female marathon runner toe dynamometer
Amo Type Article
発行日 1999-08
出版物タイトル Acta Medica Okayama
53巻
4号
出版者 Okayama University Medical School
開始ページ 189
終了ページ 191
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 10488406
Web of Sience KeyUT 000082334300005
JaLCDOI 10.18926/AMO/30474
フルテキストURL fulltext.pdf
著者 Takahara, Yasuhiro| Senda, Masuo| Hashizume, Hiroyuki| Yagata, Yukihisa| Inoue, Hajime|
抄録 <p>We observed differences in the capillary architecture of the skeletal muscles that have different fiber metabolism. The soleus, the vastus intermedius and the tibialis anterior muscles of adult Wistar rats were prepared using two different techniques. Samples for adenosine triphosphatase (ATPase) staining were prepared following Dubovitz's method, and the distributions of fiber type, Types 1, 2A and 2B, were analyzed. Then, corrosion casts of capillary architecture of these muscles prepared following Murakami's method were observed with a scanning electron microscope (SEM) and compared with the fiber distribution. The fiber type composition of the soleus muscle showed Type 1 (slow-twitch) dominance and that of the vastus intermedius and the tibialis anterior muscle showed Type 2 (fast-twitch) dominance. The capillaries of the soleus muscle were tortuous, and this was thought to be advantageous for blood supply. In contrast, the capillaries of the vastus intermedius and tibialis anterior muscles had a relatively parallel pattern. Additionally, two different patterns of capillary architecture that appeared to correspond to certain metabolic characteristic of different muscle fiber types were preserved with corrosion casting. In conclusion, comparative studies on capillary architecture of the skeletal muscles are useful for analyses of its function. </p>
キーワード skeletal muscle ATPase staining muscle fiber type corrosion cast capillary architecture
Amo Type Article
発行日 1996-08
出版物タイトル Acta Medica Okayama
50巻
4号
出版者 Okayama University Medical School
開始ページ 211
終了ページ 218
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 8874583
Web of Sience KeyUT A1996VE60800005