Strain and elongation of the vastus lateralis aponeurosis and tendon in vivo during maximal isometric contraction
Strain and elongation of the vastus lateralis aponeurosis and tendon in vivo during maximal isometric contraction
复制标题
最大等长收缩时体内股外侧腱膜和肌腱的应变和伸长
DOI：
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发表时间：
2005
影响因子：
3
通讯作者：
A. Arampatzis
中科院分区：
文献类型：
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作者：
S. Stafilidis;K. Karamanidis;Gaspar Morey;G. DeMonte;G. Brüggemann;A. Arampatzis
用Biodex测力计测量了12名短跑运动员在最大自主收缩（膝角115°，髋角140°）时股外侧肌（VL）肌腱、肌腱+腱膜和腱膜的应变和伸长。在热身阶段之后，受试者被指示进行逐渐的最大膝盖伸展并保持约3秒。使用Vicon 512系统记录腿的运动学，该系统具有在120 Hz下操作的八个摄像机。同时从VL肌腱连接处和VL肌腹的中外侧部分拍摄超声图像。在最大等长膝关节伸展时，膝关节旋转（13.6±5.9°），导致高估了肌腱组织的伸长。校正后，在肌腱连接处检查的VL肌腱的最大伸长低于（P<0.05）在肌腹处检查的VL肌腱加腱膜的最大伸长（分别为15 mm和27 mm）。肌腱、肌腱加腱膜和腱膜的最大应变估计值无统计学差异（分别为8± 2%、8± 1%和7± 2%，P>0.05）。它的结论是，人类VL肌腱，VL肌腱加腱膜，和VL腱膜的应变，估计在体内的二维超声最大等长收缩期间，没有彼此不同。在VL肌腹中的交叉点处测量的位移显著大于在VL肌腱连接处测量的位移。
The strain and elongation of the vastus lateralis (VL) tendon, tendon plus aponeurosis, and aponeurosis were examined during maximal voluntary contractions on a Biodex-dynamometer (knee angle 115°, hip angle 140°) in 12 sprinters. Following a warm-up phase, the subjects were instructed to perform a gradual maximal knee extension and hold it for about 3 s. The kinematics of the leg were recorded using a Vicon 512 system with eight cameras operating at 120 Hz. Ultrasonography images were taken simultaneously from the VL myotendinous junction and the mid lateral part of the VL muscle belly. During the maximal isometric knee extensions, the knee joint rotated (13.6±5.9°), leading to an overestimation of the elongation of the tendinous tissues. After correcting for this, the maximal elongation of the VL tendon examined at the myotendinous junction was lower (P<0.05) than the maximal elongation of the VL tendon plus aponeurosis examined at the muscle belly (15 vs. 27 mm, respectively). The maximal estimated strains of the tendon, tendon plus aponeurosis, and aponeurosis showed no statistical differences (8±2%, 8±1%, and 7±2%, respectively, P>0.05). It is concluded that the strains of the human VL tendon, VL tendon plus aponeurosis, and VL aponeurosis, as estimated in vivo by two dimensional ultrasound during maximal isometric contractions, do not differ from each other. The displacement measured at a cross point in the VL muscle belly is significantly greater than that measured at the VL myotendinous junction.