Elastic properties of human Achilles tendon are correlated to muscle strength
Elastic properties of human Achilles tendon are correlated to muscle strength
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DOI：
10.1152/japplphysiol.00624.2004
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发表时间：
2005-08-01
影响因子：
3.3
通讯作者：
Kanehisa, H
中科院分区：
文献类型：
--
作者：
Muraoka, T;Muramatsu, T;Kanehisa, H
本研究的目的是调查人类跟腱的力学性能是否与小腿三头肌的肌肉力量相关。24名男性和12名女性施加最大自愿等长跖屈（MVIP）扭矩。使用超声从内侧腓肠肌的远侧肌腱连接处的位移确定MVIP处的跟腱（其近端部分是腓肠肌肌腱和比目鱼肌腱膜的复合物）的伸长（Δ X）和应变。根据MVIP扭矩和跟腱力臂计算MVIP时的跟腱力（F）。男性和女性之间的F-Δ X或F-Δ X关系无显著差异。Δ X和Δ E分别为9.8 ± 2.6 mm和5.3 ± 1.6%，与F呈正相关（r = 0.39，P < 0.05; r = 0.39，P < 0.05），这意味着肌肉力量更大的受试者可以在肌腱中储存更多的弹性能量。F-Delta X（P < 0.01）和F-Delta X（P < 0.05）关系的回归gamma截距均为显著正相关。这些结果可能表明，跟腱在具有更大肌肉力量的受试者中更僵硬，这可能在降低肌腱拉伤的概率方面发挥作用。有人认为，具有更大肌肉力量的受试者的跟腱不会损害肌腱中储存弹性能量的潜力，并且可能能够更有效地传递更强肌肉提供的更大力量。此外，男性和女性之间跟腱力学性能的差异似乎与肌肉力量的差异有关，而不是性别。
The purpose of this study was to investigate whether the mechanical properties of the Achilles tendon were correlated to muscle strength in the triceps surae in humans. Twenty-four men and twelve women exerted maximal voluntary isometric plantar flexion (MVIP) torque. The elongation (Delta X) and strain of the Achilles tendon (epsilon), the proximal part of which is the composite of the gastrocnemius tendon and the soleus aponeurosis, at MVIP were determined from the displacement of the distal myotendinous junction of the medial gastrocnemius using ultrasonography. The Achilles tendon force at MVIP (F) was calculated from the MVIP torque and the Achilles tendon moment arm. There were no significant differences in either the F-Delta X or F-epsilon relationships between men and women. Delta X and epsilon were 9.8 +/- 2.6 mm and 5.3 +/- 1.6%, respectively, and were positively correlated to F (r = 0.39, P < 0.05; r = 0.39, P < 0.05), which meant that subjects with greater muscle strength could store more elastic energy in the tendon. The regression gamma-intercepts for the F-Delta X (P < 0.01) and F-epsilon (P < 0.05) relationship were significantly positive. These results might indicate that the Achilles tendon was stiffer in subjects with greater muscle strength, which may play a role in reducing the probability of tendon strain injuries. It was suggested that the Achilles tendon of subjects with greater muscle strength did not impair the potential for storing elastic energy in tendons and may be able to deliver the greater force supplied from a stronger muscle more efficiently. Furthermore, the difference in the Achilles tendon mechanical properties between men and women seemed to be correlated to the difference in muscle strength rather than gender.