Targeted resistance training stimulates hamstring muscle hypertrophy, but its effect on tendon‐aponeurosis geometry is unknown. This study examined changes in hamstring muscle, free tendon, and aponeurosis geometry following a 10 week Nordic or hip extension exercise intervention. Thirty recreationally active males were randomly allocated (n = 10 per group) to a Nordic, hip extension, or control group. Magnetic resonance imaging of both thighs was acquired pre‐ and post‐intervention. Changes in free tendon and aponeurosis volume for each hamstring muscle, biceps femoris long head (BFlh) aponeurosis interface area and muscle volume‐to‐interface area ratio were compared between groups. Regional changes in muscle CSA were examined via statistical parametric mapping. The change in semimembranosus free tendon volume was greater for the Nordic than control group (mean difference = 0.06 cm3, 95% CI = 0.02–0.11 cm3). No significant between‐group differences existed for other hamstring free tendons or aponeuroses. There were no between‐group differences in change in BFlh interface area. Change in BFlh muscle volume‐to‐interface area ratio was greater in the hip extension than Nordic (mean difference = 0.10, 95% CI = 0.007–0.19, p = 0.03) and control (mean difference = 0.12, 95% CI = 0.03–0.22, p = 0.009) groups. Change in muscle CSA following training was greatest in the mid‐portion of semitendinosus for both intervention groups, and the mid‐portion of BFlh for the hip extension group. There was limited evidence for tendon‐aponeurosis hypertrophy after 10 weeks of training with the Nordic or hip extension exercises. For the BFlh, neither intervention altered the interface area although hip extension training stimulated an increase in the muscle volume‐to‐interface area ratio, which may have implications for localized tissue strains. Alternative muscle‐tendon loading strategies appear necessary to stimulate hamstring tendon adaptations.

中文翻译：

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使用髋关节伸展和北欧腘绳肌练习对阻力训练的腘绳肌肌腱几何适应


有针对性的阻力训练刺激腘绳肌肥大，但其对肌腱腱膜几何形状的影响尚不清楚。本研究检查了 10 周北欧或髋关节伸展运动干预后腘绳肌、游离肌腱和腱膜几何形状的变化。30 名娱乐活跃的男性被随机分配 （每组 n = 10） 到北欧、髋关节伸展或对照组。干预前后采集双大腿磁共振成像。比较各组间腘绳肌游离肌腱和腱膜体积、股二头肌长头 （BFlh） 腱膜界面面积和肌肉体积与界面面积比值的变化。通过统计参数映射检查肌肉 CSA 的区域变化。北欧组半膜肌游离肌腱体积的变化大于对照组 （平均差 = 0.06 cm3,95% CI = 0.02–0.11 cm3）。其他腘绳肌游离肌腱或腱膜不存在显著的组间差异。BFlh 界面面积的变化没有组间差异。髋关节伸展中 BFlh 肌肉体积与界面面积比的变化大于北欧组 （平均差 = 0.10,95% CI = 0.007-0.19，p = 0.03） 和对照组 （平均差 = 0.12,95% CI = 0.03-0.22，p = 0.009） 组。两个干预组训练后肌肉 CSA 的变化在半腱肌中部最大，而髋关节伸展组在 BFlh 中部的变化最大。北欧式或髋关节伸展练习训练 10 周后肌腱腱膜肥大的证据有限。 对于 BFlh，尽管髋关节伸展训练刺激了肌肉体积与界面面积比的增加，但两种干预措施都没有改变界面面积，这可能对局部组织拉伤有影响。替代肌肉肌腱负荷策略似乎有必要刺激腘绳肌腱适应。