Gender differences in the viscoelastic properties of tendon structures
Gender differences in the viscoelastic properties of tendon structures
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DOI：
10.1007/s00421-002-0744-8
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发表时间：
2003-02-01
影响因子：
3
通讯作者：
Fukunaga, T
中科院分区：
文献类型：
--
作者：
Kubo, K;Kanehisa, H;Fukunaga, T
本研究的目的是探讨男性(n=16)和女性(n=13)腓肠肌内侧肌腱结构(腱和腱)的粘弹性特性的差异。超声直接测量腓肠肌内侧肌腱和腱膜的伸长率，同时受试者进行斜坡等长足底屈曲，直到自愿的最大值，然后进行斜坡放松。估计肌力(Fm)与肌腱伸长(L)之间的关系符合线性回归，其斜率定义为刚度。在上升阶段，FM-L环内的面积占曲线下面积的百分比被计算为滞后。在部队生产水平超过50N时，女性的L值显著大于男性。最大应变(100xDeltaL/肌腱初始长度)女性[9.5(1.1)%]明显大于男性[8.1(1.6)%]。女性椎体的刚度和弹性系数分别为16.5(3.4)N/mm、277(25)Mpa，明显低于男性的25.9(7.0)N/mm、356(32)Mpa。此外，女性的磁滞[11.1(5.9)%]明显低于男性[18.7(8.5)%，P=0.048]。这些结果表明，肌腱结构的粘弹性特性存在性别差异，这可能是之前观察到的性别之间表现差异的部分原因。
The purpose of this study was to investigate the differences in the viscoelastic properties of human tendon structures (tendon and aponeurosis) in the medial gastrocnemius muscle between men (n = 16) and women (n = 13). The elongation of the tendon and aponeurosis of the medial gastrocnemius muscle was measured directly by ultrasonography, while the subjects performed ramp isometric plantar flexion up to the voluntary maximum, followed by a ramp relaxation. The relationship between the estimated muscle force (Fm) and tendon elongation (L) during the ascending phase was fitted to a linear regression, the slope of which was defined as stiffness. The percentage of the area within the Fm-L loop to the area beneath the curve during the ascending phase was calculated as hysteresis. The L values at force production levels beyond 50 N were significantly greater for women than for men. The maximum strain (100xDeltaL/initial tendon length) was significantly greater in women [9.5 (1.1)%] than in men [8.1 (1.6)%]. The stiffness and Young's modulus were significantly lower in women [16.5 (3.4) N/mm, 277 (25) MPa] than in men [25.9 (7.0) N/mm, 356 (32) MPa]. Furthermore, the hysteresis was significantly lower in women [11.1 (5.9)%] than in men [18.7 (8.5)%, P = 0.048]. These results suggest that there are gender differences in the viscoelastic properties of tendon structures and that these might in part account for previously observed performance differences between the genders.