Region specific patellar tendon hypertrophy in humans following resistance training
Region specific patellar tendon hypertrophy in humans following resistance training
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DOI：
10.1111/j.1748-1716.2007.01714.x
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发表时间：
2007-10-01
影响因子：
6.3
通讯作者：
Magnusson, S. P.
中科院分区：
文献类型：
--
作者：
Kongsgaard, M.;Reitelseder, S.;Magnusson, S. P.
目的：观察抗阻训练后人体髌腱(PT)横截面积(CSA)是否不同，以及PT是否肥大。方法：对12名健康青年男性进行基线和训练后评估。单侧测定双腿的最大等长伸膝力量(MVC)。分别在PT近、中、远端水平测量PT CSA，在股中水平测量股四头肌CSA。用超声检查测定其力学性能。结果：重腿组MVC增加(15+/-4%，P<0.05)，轻腿组MVC增加不明显(6+/-4%)。股四头肌CSA在重腿组增加(6+/-1%，P<；0.05)，而轻腿组无变化。近端PT CSA(104+/-4 mm(2))小于腱中CSA(118+/-3 mm(2))，远端CSA(127+/-2 mm(2))小于肌腱中CSA(127±2 mm(2)，P<0.05)。在近端肌腱水平，轻腿PT CSA增加了7+/-3%(P<；0.05)，但其他方面没有变化。大腿PT CSA在近端和远端肌腱水平分别增加6+/-3%和4+/-2%(P<；0.05)，但在中腱水平没有变化。PT僵硬在重腿组增加(P<；0.05)，而在轻腿组无变化。结论：据我们所知，这项研究首次报道了阻力训练后的肌腱肥大。此外，数据显示，人的PT CSA沿肌腱的长度变化。
Aim: To examine if cross-sectional area (CSA) differs along the length of the human patellar tendon (PT), and if there is PT hypertrophy in response to resistance training.Methods: Twelve healthy young men underwent baseline and post-training assessments. Maximal isometric knee extension strength (MVC) was determined unilaterally in both legs. PT CSA was measured at the proximal-, mid- and distal PT level and quadriceps muscle CSA was measured at mid-thigh level using magnetic resonance imaging. Mechanical properties of the patellar tendons were determined using ultrasonography. Subsequently, subjects performed 12 weeks of heavy resistance knee extension training with one leg (Heavy-leg), and light resistance knee extension training with the other leg (Light-leg).Results: The MVC increased for heavy-leg (15 +/- 4%, P < 0.05), but not for light-leg (6 +/- 4%). Quadriceps CSA increased in heavy-legs (6 +/- 1%, P < 0.05) while unchanged in light-legs. Proximal PT CSA (104 +/- 4 mm(2)) was smaller than the mid-tendon CSA (118 +/- 3 mm(2)), which again was smaller than distal tendon CSA (127 +/- 2 mm(2), P < 0.05). Light-leg PT CSA increased by 7 +/- 3% (P < 0.05) at the proximal tendon level, but was otherwise unchanged. Heavy-leg PT CSA increased at the proximal and distal tendon levels by 6 +/- 3% and 4 +/- 2% respectively (P < 0.05), but was unchanged at the mid tendon level. PT stiffness increased in heavy-legs (P < 0.05) but was unchanged in light-legs. Modulus remained unchanged in both legs.Conclusions: To our knowledge, this study is the first to report tendon hypertrophy following resistance training. Further, the data show that the human PT CSA varies along the length of the tendon.