Effect of Acute Tensile Loading on Gender-Specific Tendon Structural and Mechanical Properties
Effect of Acute Tensile Loading on Gender-Specific Tendon Structural and Mechanical Properties
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DOI：
10.1002/jor.20768
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发表时间：
2009-04-01
影响因子：
2.8
通讯作者：
Pearson, Stephen J.
中科院分区：
文献类型：
--
作者：
Burgess, Katherine E.;Graham-Smith, Phillip;Pearson, Stephen J.
拉伸通常在运动前使用，因为它被认为可以降低受伤的风险，并且它也用于肌腱移植物的预处理。由于肌腱特性已被证明是不同的性别之间，有人提出，拉伸将差异影响的结构。在这里，我们研究急性拉伸对男性和女性内侧腓肠肌肌腱的力学性能的影响。女性垂直杆20岁+/- 1（SEM），n = 17垂直杆和男性（22岁+/- 1，n = 18）受试者接受了5分钟的被动背屈拉伸。采用超声和测力法测量拉伸前后内侧腓肠肌肌腱刚度（K）、长度（l）和横截面积（csa）。对于两种性别，随着拉伸，刚度和杨氏模量（杨氏模量）显著降低（p < 0.05）。与男性相比，女性在K（22.4 vs. 8.8%）和K（20.5 vs. 8.4%）方面表现出显著（p < 0.05）更大的拉伸前后下降。目前的研究结果表明，拉伸急剧降低刚度的内侧腓肠肌肌腱在女性和男性，女性表现出显着更大的变化。观察到的性别差异可能部分归因于肌腱力臂的变化和肌腱成分的内在差异。肌腱力学特性的这些差异性变化具有功能、运动控制和损伤风险影响，以及肌腱移植物预处理的可能影响。(C)2008骨科研究学会。出版社：Wiley Periodicals，Inc. J Orthop Res 27：510-516，2009
Stretching is commonly used prior to exercise, as it is thought to reduce the risk of injury, and it is also used in the preconditioning of tendon grafts. As tendon properties have been shown to be different between genders, it is proposed that stretching will differentially affect the structure. Here we examine the effect of acute stretch on the mechanical properties of both male and female medial gastrocnemius tendon. Female vertical bar 20 years +/- 1 (SEM), n = 17 vertical bar and male (22 years +/- 1, n = 18) subjects underwent a 5-min passive dorsiflexion stretch. Prior to and post stretch medial gastrocnemius tendon stiffness (K), length (l) and cross-sectional area (csa) were measured using ultrasonography and dynamometry. Stiffness and Young's modulus (epsilon) were significantly reduced with stretch for both genders (p < 0.05). Females showed significantly (p < 0.05) greater pre- to poststretch decreases in K (22.4 vs. 8.8%) and epsilon (20.5 vs. 8.4%) in comparison to males. The present results show that stretching acutely reduces stiffness of the medial gastrocnemius tendon in females and males, with females showing significantly greater change. The observed disparity between genders may be due in part to variations in tendon moment arm and intrinsic differences in tendon composition. These differential changes in tendon mechanical properties have functional, motor control, and injury risk implications, as well as possible implications for preconditioning of tendon grafts. (C) 2008 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 27:510-516, 2009