Modification of soft tissue vibrations in the leg by muscular activity
Modification of soft tissue vibrations in the leg by muscular activity
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DOI：
10.1152/jappl.2001.90.2.412
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发表时间：
2001-02-01
影响因子：
3.3
通讯作者：
Nigg, BM
中科院分区：
文献类型：
--
作者：
Wakeling, JM;Nigg, BM
记录了肱三头肌表面、胫骨前肌和股四头肌软组织的振动特征。当腿部进行等距和等张收缩时，测量这些组织的自由振动频率和阻尼。软组织振动频率和阻尼随下底肌肉产生的力和缩短的速度而增加。在垂直于皮肤表面的方向上，频率和阻尼都大于平行于腿段长轴的方向。振动特性随着肌肉长度和测试个体之间的变化而进一步变化。测量的振动频率范围与运行过程中冲击力的典型频率相吻合。然而，观察表明，在跑步过程中，软组织的振动是最小的。这些结果支持这样一种策略，即肌肉活动的增加可能被一些人用来改变软组织的频率和阻尼特性，使其远离冲击力，从而最大限度地减少行走和跑步时的振动。
Vibration characteristics were recorded for the soft tissues of the triceps surae, tibialis anterior, and quadriceps muscles. The frequency and damping of free vibrations in these tissues were measured while isometric and isotonic contractions of the leg were performed. Soft tissue vibration frequency and damping increased with both the force produced by and the shortening velocity of the underlying muscle. Both frequency and damping were greater in a direction normal to the skin surface than in a direction parallel to the major axis of each leg segment. Vibration characteristics further changed with the muscle length and between the individuals tested. The range of the measured vibration frequencies coincided with typical frequencies of impact forces during running. However, observations suggest that soft tissue vibrations are minimal during running. These results support the strategy that increases in muscular activity may be used by some individuals to move the frequency and damping characteristics of the soft tissues away from those of the impact force and thus minimize vibrations during walking and running.