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Passive and active muscle stiffness in plantar flexors of long distance runners.

Abstract：

:The aim of the present study was to compare passive and active muscle stiffness and tendon stiffness between long distance runners and untrained men. Twenty long distance runners and 24 untrained men participated in this study. Active muscle stiffness in the medial gastrocnemius muscle was calculated according to changes in estimated muscle force and fascicle length during fast stretching after submaximal isometric contractions. Passive muscle stiffness was also calculated from estimated passive muscle force and fascicle length during slow passive stretching. Tendon stiffness was determined during isometric plantar flexion by ultrasonography. Passive muscle stiffness of long distance runners was significantly higher than that of untrained men (p<0.001). Active muscle stiffness at all torque levels of long distance runners was also significantly higher than that of untrained men (p<0.001). No significant difference was observed in tendon stiffness between long distance runners and untrained men (p=0.869). These results suggested that passive and active muscle stiffness were higher in long distance runners than in untrained men, whereas no significant difference was observed in tendon stiffness between the two groups.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Kubo K,Miyazaki D,Yamada K,Yata H,Shimoju S,Tsunoda N

doi

10.1016/j.jbiomech.2015.04.012

subject

Has Abstract

pub_date

2015-07-16 00:00:00

pages

1937-43

issue

10

eissn

0021-9290

issn

1873-2380

pii

S0021-9290(15)00228-6

journal_volume

48

pub_type

杂志文章

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