Muscle activities of the lower limb during level and uphill running.
Muscle activities of the lower limb during level and uphill running.
复制标题
平跑和上坡跑时下肢的肌肉活动。
DOI：
10.1016/j.jbiomech.2007.05.028
复制
发表时间：
2007
影响因子：
2.4
通讯作者：
M. Ae
中科院分区：
文献类型：
--
作者：
Toshiharu Yokozawa;N. Fujii;M. Ae
本研究旨在通过使用肌肉骨骼模型来比较地面水平跑步（LR）和上坡跑步（UR）期间下肢的肌肉活动。六名男性长跑运动员在水平跑道、坡度9.1%、安装有测力平台的坡度上以三种跑步速度（慢速：3.3m/s；中速：4.2m/s；高速：5.0m/s）进行跑步。使用肌肉骨骼腿部模型和优化来根据逆动力学方法计算的下肢关节扭矩来估计肌肉激活和肌肉扭矩。在高速状态下，髋关节周围肌肉群（例如腘绳肌和髂腰肌）在恢复阶段的激活和肌肉扭矩在 UR 期间明显大于 LR 期间。在所有跑步速度下，在 UR 期间，在支撑阶段，vasi 产生的膝部伸展扭矩明显较小。此外，在所有速度下，UR 期间股直肌的髋部屈曲和膝部伸展扭矩均显着大于 LR 期间；这将起到补偿膝关节伸展扭矩减少的作用，并保持躯干处于前倾位置。这些结果表明，在高速 UR 过程中，髋部伸肌和屈肌的激活和肌肉扭矩得到了增强。
This study aimed to compare the muscle activities of the lower limb during overground level running (LR) and uphill running (UR) by using a musculoskeletal model. Six male distance runners ran at three running speeds (slow: 3.3m/s; medium: 4.2m/s; and high: 5.0m/s) on a level runway and a slope of 9.1% grade in which force platforms were mounted. A musculoskeletal leg model and optimization were used to estimate the muscle activation and muscle torque from the joint torque of the lower limb calculated by the inverse dynamics approach. At high speed, the activation and muscle torque of the muscle groups surrounding the hip joints, such as the hamstrings and iliopsoas, during the recovery phase were significantly greater during UR than during LR. At all the running speeds, the knee extension torque by the vasti during the support phase was significantly smaller during UR. Further, the hip flexion and knee extension torques by the rectus femoris during UR were significantly greater than those during LR at all the speeds; this would play a role in compensating for the decrease in the knee extension torque by the vasti and in maintaining the trunk in a forward-leaning position. These results revealed that the activation and muscle torque of the hip extensors and flexors were augmented during UR at the high speed.
影响因子：
2.4
作者：
BRAND, RA;PEDERSEN, DR;FRIEDERICH, JA
通讯作者：
FRIEDERICH, JA
影响因子：
--
作者：
F. Zajac
通讯作者：
F. Zajac