Muscle activities of the lower limb during level and uphill running

被引:37
|
作者
Yokozawa, Toshiharu
Fujii, Norihisa
Ae, Michlyoshi
机构
[1] Japan Inst Sports Sci, Dept Sports Sci, Tokyo 1150056, Japan
[2] Univ Tsukuba, Inst Hlth & Sports Sci, Tsukuba, Ibaraki 3058574, Japan
关键词
uphill running; musculoskeletal model; muscle torque; activation level;
D O I
10.1016/j.jbiomech.2007.05.028
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
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: 3.3 m/s; medium: 4.2 m/s; and high: 5.0 m/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. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3467 / 3475
页数:9
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