著者

谷埜 予士次 熊崎 大輔 舌 正史 大工谷 新一 森 裕展

出版者

関西理学療法学会

雑誌

関西理学療法 (ISSN:13469606)

巻号頁・発行日

vol.1, pp.15-24, 2001 (Released:2005-06-07)

参考文献数

13

被引用文献数

2

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We performed physical therapy after reconstruction of the posterior cruciate ligament (PCL) on a Japanese Taekwondo player. In physical therapy after the reconstruction of PCL, we had to protect PCL from mechanical stress. To protect the reconstructed PCL in this case, we predicted the traction stress for PCL by motion analysis using surface electromyography (EMG). In order to avoid the traction stress on PCL, we checked the muscle activity of the quadriceps femoris and the hamstrings during various kinds of muscle strengthening exercises for the lower extremity in the closed kinetic chain (CKC). The muscle contraction of hamstrings with knee flexion caused the posterior displacement of the tibia, and the traction load on PCL was increased with a contraction of hamstrings. On the other hand, because the muscle contraction of the quadriceps femoris produced anterior sharing force of the tibia, the contraction of the quadriceps femoris could protect the PCL from traction load. Therefore, we selected the muscle strengthening exercises in which the muscle activity of the hamstrings was lower and the muscle activity of the quadriceps femoris was higher. Twelve weeks post operation, the muscle strength of the quadriceps femoris had reached a level compatible with returning to competition, and since the patient had no pain or instability of the knee, we had him perform athletic training (jogging, running, step drill, etc.). He could practice athletic training without any pain or feeling instability of the knee. After 19 weeks post operation, we had him perform kick training gradually under the doctor's permission, and to prevent the hamstrings tearing as well as increasing the performance of kicking, we started him on muscle strengthening exercises of the hamstrings with the kick training gradually. After about 27 weeks post operation, the patient could practice all Taekwondo training without any knee pain or feeling instability of the knee, and after about 43 weeks post operation, he competed successfully in the All Japan Taekwondo Championship and becoming. In conclusion, because we selected the muscle strengthening training avoiding traction load on the PCL, the patient could carry out athletic training and Taekwondo training in safety after the operation.

著者

吉田 昌平 守田 武志 舌 正史 沼倉 たまき 小出 裕美子 中尾 聡志 足立 哲司 原 邦夫

出版者

公益社団法人 日本理学療法士協会

雑誌

理学療法学Supplement

巻号頁・発行日

vol.2002, pp.474, 2003

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【目的】今回我々は体重の1%(1%BW)、2.5%(2.5%BW)、5%(5%BW)、7.5%(7.5%BW)、10%(10%BW)の5種類の負荷を用いて全力ペダリングを実施し、それぞれの負荷によって得られるパワー発揮特性をピークパワー(PP)、体重あたりのPP(PP/BW)、ピーク回転数(P-rpm)と最大無酸素パワー(MAnP)から評価し、実際の30mスプリントパフォーマンスとの関係について検討した。【方法】某大学サッカー部、男子14名(年齢19歳、身長172cm、体重68kg)を対象とし、自転車エルゴメーター(パワーマックスVII)を用いて、1、2.5、5、7.5、10%BWの5種類の負荷で各1回10秒間の全力ペダリングを実施した。それぞれの負荷で得られたPP、PP/BW、 P-rpmを二次回帰し、負荷-PP 、PP/BW、 P-rpm曲線を算出した。30mスプリントテストは3回の試技を手動により計測しその平均時間を求めた。【結果】1)PPは負荷との間にY=-3.689+ 230.247*X-13.146*X^2(r=.99)の関係が認められた。PP/BWは負荷との間にY=-.267 +3.612*X-229*X^2(r=.99)の関係が認められた。rpmは負荷との間にY=227.96- 10.405*X-.311*X^2(r=.95)の関係が認められた。負荷-PP 曲線から算出したMAnPは988wattで、体重あたりのMAnP(MAnP/BW)は14.4 watt/BWであった。MAnPが得られた時のrpm(MAnP-rpm)は120 rpmで、負荷は12.4%BWであった。2)3回試技における30mスプリントテストの平均時間は4.15±0.13秒であった。30mスプリントパフォーマンスと各負荷のPP、PP/BW、P-rpmの相関係数は1%BWでそれぞれr=-.21、r=-.41、r=-.59(ns、ns、p=.026)、2.5%BWでそれぞれr=-.21、r=-.48、r=-.61(ns、ns、 p=.020)、5%BWでそれぞれr=-.28、r=-.68、r=-.70(ns、p =.010、p=.006)、7.5%BWでそれぞれr=-.29、r=-.55、r=-.57(ns、p =.041、p=.034)、10%BWでそれぞれr=-.31、r=-.42、r=-.42(ns)、MAnP 、MAnP/BW、MAnP-rpmでそれぞれr=_-_.21、r=-.22、r=-.42(ns)であった。多変量解析で30mスプリントパフォーマンスと有意に相関したのは5%BW でのP-rpmのみであった(p<.01)。【考察】PPおよびPP/BWは、負荷-PP、PP/BW曲線からMAnPが得られた負荷12.4%BWを上限として負荷が大きくなればなる程高い値を示した。P-rpmは、負荷-P-rpm曲線から負荷が小さくなればなる程高い値を示した。このようなパワー発揮特性とスプリントパフォーマンスとの関係について検討すると、パワーは負荷が大きい程高い値が得られるが、スプリントパフォーマンスとの関係はむしろ弱くなった。逆に負荷を小さくして高回転を得た方がスプリントパフォーマンスとの関係は強くなった。すなわち、スプリントパフォーマンスは踏力よりもむしろ回転速度に依存したパワー発揮特性と関係が強く、ペダル回転数が実際の走動作であるピッチ数と関係していると推察した。

著者

谷埜 予士次 熊崎 大輔 舌 正史 大工谷 新一 森 裕展

出版者

関西理学療法学会

雑誌

関西理学療法 (ISSN:13469606)

巻号頁・発行日

vol.1, pp.15-24, 2001

被引用文献数

1

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We performed physical therapy after reconstruction of the posterior cruciate ligament (PCL) on a Japanese Taekwondo player. In physical therapy after the reconstruction of PCL, we had to protect PCL from mechanical stress. To protect the reconstructed PCL in this case, we predicted the traction stress for PCL by motion analysis using surface electromyography (EMG). In order to avoid the traction stress on PCL, we checked the muscle activity of the quadriceps femoris and the hamstrings during various kinds of muscle strengthening exercises for the lower extremity in the closed kinetic chain (CKC). The muscle contraction of hamstrings with knee flexion caused the posterior displacement of the tibia, and the traction load on PCL was increased with a contraction of hamstrings. On the other hand, because the muscle contraction of the quadriceps femoris produced anterior sharing force of the tibia, the contraction of the quadriceps femoris could protect the PCL from traction load. Therefore, we selected the muscle strengthening exercises in which the muscle activity of the hamstrings was lower and the muscle activity of the quadriceps femoris was higher. Twelve weeks post operation, the muscle strength of the quadriceps femoris had reached a level compatible with returning to competition, and since the patient had no pain or instability of the knee, we had him perform athletic training (jogging, running, step drill, etc.). He could practice athletic training without any pain or feeling instability of the knee. After 19 weeks post operation, we had him perform kick training gradually under the doctor's permission, and to prevent the hamstrings tearing as well as increasing the performance of kicking, we started him on muscle strengthening exercises of the hamstrings with the kick training gradually. After about 27 weeks post operation, the patient could practice all Taekwondo training without any knee pain or feeling instability of the knee, and after about 43 weeks post operation, he competed successfully in the All Japan Taekwondo Championship and becoming. In conclusion, because we selected the muscle strengthening training avoiding traction load on the PCL, the patient could carry out athletic training and Taekwondo training in safety after the operation.<br>