School of Health Sciences and Social Work, Griffith University, Gold Coast, Queensland, Australia.
Griffith Centre of Biomedical and Rehabilitation Engineering (GCORE), Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia.
Scand J Med Sci Sports. 2024 Sep;34(9):e14728. doi: 10.1111/sms.14728.
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 cm, 95% CI = 0.02-0.11 cm). 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.
目标阻力训练可刺激腘绳肌肥大，但它对肌腱-腱膜几何结构的影响尚不清楚。本研究检查了 10 周北欧式或髋关节伸展运动干预后腘绳肌、游离肌腱和腱膜几何结构的变化。30 名有规律运动的男性被随机分配（每组 10 人）到北欧式、髋关节伸展或对照组。在干预前后对双侧大腿进行磁共振成像。比较各组之间每个腘绳肌的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的变化。通过统计参数映射检查肌肉 CSA 的区域变化。与对照组相比，北欧式组半膜肌游离肌腱体积的变化更大（平均差异=0.06cm，95%置信区间=0.02-0.11cm）。其他腘绳肌游离肌腱或腱膜之间无显著组间差异。BFlh 界面面积的变化在组间无差异。与北欧式组相比，髋关节伸展组 BFlh 肌肉体积与界面面积比的变化更大（平均差异=0.10，95%置信区间=0.007-0.19，p=0.03）和对照组（平均差异=0.12，95%置信区间=0.03-0.22，p=0.009）。训练后 CSA 的变化在北欧式和髋关节伸展组中最大的是半腱肌的中段，而在髋关节伸展组中最大的是 BFlh 的中段。有证据表明，经过 10 周的北欧式或髋关节伸展运动训练，肌腱-腱膜发生了适度的肥大。对于 BFlh，两种干预都没有改变界面面积，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，这可能对局部组织应变有影响。需要采用替代的肌肉-肌腱加载策略来刺激腘绳肌腱适应。
