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Development of strength training for the purpose of increasing bone mineral density in the person with spinal cord injury

开发力量训练以增加脊髓损伤患者的骨矿物质密度

基本信息

批准号：
07458016
负责人：
YABE Kyonosuke
金额：
$ 4.29万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07458016/
关键词：
spinal cord injury mineral bone density dynamic strength direct linear transformation adapted sports 脊損者筋力フリースロー

项目摘要

The purpose of this study is to develop a strength training program and to seek basic data for development of an effective exercise program to increase bone mineral density (BMD).Isokinetic power of elbow joint in 15 paraplegic and 10 quadriplegic subjects were measured at 60 and 180 degrees/sex by use of the Cybex II isokinetic dynamometers. The extension and flexion torques in paraplegic group (PG) were significantly greater (p<0.05) than those in quadriplegic group (QG). These results indicate that forearm muscles playd a relatively higher role in elbow extension/flexion action in quadriplegic individuals. Regarding the relationship between isokinetic peak torque and spinal cord lesion level, the torque increased with the level in QG,while it decreased in with the level in PG.This tendency indicated that paraplegic individuals with lower spinal cord lesion level are utilized muscles in trunk in addition to those in upper extremities to drive an arm chair in daily life.The effects of high-intensity resistance training on bone mineral density (BMD) were investigated from the biomechanical point of view. BMD of lumber spine (L2-4), proximal femur and whole body was measured using dual-energy x-ray absorptiometry (DEXA) for powerlifters and 11 controls. There were significant differences in lumber spine and whole body BMD between powerlifters and controls, but not in proximal femur BMD.A significant correlation was found between lumbar spine BMD and powerliting performance. These results suggest that high-intensity resistance training is effective in increasing the BMD of lumbar spine and whole body. From a biomechanical standpoint, it appeared that compressive stress exerted on bone by high-intensity loads was also effective in increasing BMD.

为探讨力量训练对提高骨密度的作用，采用Cybex Ⅱ型等速肌力测试仪，对15例截瘫和10例四肢瘫受试者在60 °和180 °/性别时肘关节等速功率进行了测试。截瘫组（PG）的屈伸力矩明显大于四肢瘫组（QG）（P<0.05）。这些结果表明，前臂肌肉在四肢瘫痪者的肘关节伸/屈动作中起着相对较高的作用。在等速峰值扭矩与脊髓损伤平面的关系方面，在QG中，扭矩随脊髓损伤平面的增加而增加，研究了大强度抗阻训练对骨密度（BMD）的影响，并探讨了运动负荷对BMD的影响。从生物力学的角度进行了研究。采用双能X线骨密度仪（DEXA）测定了举重运动员和11名对照组的腰椎（L2-4）、股骨近端及全身的骨密度。举重运动员腰椎和全身骨密度与对照组相比差异有统计学意义，但股骨近端骨密度差异无统计学意义，腰椎骨密度与举重成绩之间存在显著相关性。提示大强度抗阻训练能有效提高腰椎及全身骨密度。从生物力学的角度来看，高强度负荷对骨施加的压应力似乎也能有效增加BMD。