<研究論文>柔道選手の体幹伸展力に関する研究 : 筋性腰痛との関連性について

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The cause of myogenic lumbago was investigated from the stand point of lumbar extension torque. The Lumbar Extension Machine from MEDX Co.Ltd. which can measur pure lumbar extension torque was used to evaluate 32 Judo athletes in this study. Jjdo athletes were divided into lumbago group and normal group and measured muscle torque in lumbar maximum flexion and maximum extension position. A study was conducted to determine the specificity of producing muscle torque in two control groups : a normal group and a lumbago group. Since no distinct differences were observed in the values of extended muscle torque between the two groups, the cause of lumbago could not be determined from the values of muscular strength. The effects of physical exercise on the lumbago group was also studied. The group exercised on a lumbar extension machine once a week for six weeks, focusing on stretching the lumbar muscles. As a result, muscular strength was significantly improved. The effects of such exercise were particularly noticeable in the flexion position. In the flexion position, extrinisic muscles stretched more than intrinsic muscles. Therefore, muscle tension in the flexion position is more affected by extrinsic muscles, which explains the effectiveness of physical exercise. The degree of muscle fatigue was also studied for both groups. The normal group showed less muscle torque in the extended position than the flexion position after exercise, with more muscle fatigue than the lumbago group. Before exercising, the lumbago group showed less fatigue in the extended position than the normal group. The relatively low degree of muscle fatigue shown by the lumbago group in the extended position may be due to less active intrinsic muscles. The extension strength of the body in the upright position is evidenced by the unified strength of several muscles groups, such as the lumbar region extension muscle group and hip joint extension muscles. Consequently, to treat the lumbar muscles, each muscle involved in body extension should be evaluated separately and weakened muscles should be selectively exercised to increase muscular strength and to prevent lumbago.
1997-03-20

<研究論文>柔道選手の体幹伸展力に関する研究 : 筋性腰痛との関連性について

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