Hip Abductors and Lumbar Lateral Flexors act as Energy Generators in Running Single-leg Jumps
Hip Abductors and Lumbar Lateral Flexors act as Energy Generators in Running Single-leg Jumps
复制标题
髋关节外展肌和腰椎侧屈肌在跑步单腿跳跃中充当能量发生器
DOI：
10.1055/a-0749-8846
复制
发表时间：
2018
影响因子：
2.5
通讯作者：
Fukashiro Senshi
中科院分区：
文献类型：
--
作者：
Sado Natsuki;Yoshioka Shinsuke;Fukashiro Senshi
在人类中，髋外展肌和腰侧屈肌作为腰骨盆侧稳定器发育良好。我们假设髋外展肌和腰侧屈肌在跑步单腿跳跃中起能量发生器的作用，尽管它们通常被认为是稳定器。收集了13名男子跳高运动员单腿助跑起跳的运动学和地面反力数据，计算了三维运动学变量。髋关节外展和腰骶侧屈向自由腿侧扭矩施加在几乎整个起飞阶段，施加正功率在终端2/3的阶段。髋外展肌的正功（1.08±0.30 J/kg）与踝跖屈肌的正功相当，提示髋外展肌的能量产生潜力与站立腿关节伸肌相当。腰骶侧屈肌也进行正功（0.36±0.18 J/kg），为膝伸肌的47±25%，但低于站立腿关节的伸肌。结果表明，髋外展肌和腰侧屈肌不仅具有稳定的潜力，而且还具有能量发生器的潜力，并且在单腿跳跃时，它们可以作为大量的能量发生器。
In humans, hip abductor and lumbar lateral flexor muscles are well-developed as side-to-side lumbopelvic stabilizers. We hypothesized that the hip abductors and lumbar lateral flexors act as energy generators during a running single-leg jump, although they are generally recognized as stabilizers. We collected kinematics and ground reaction force data in running single-leg jumps by 13 male high jumpers and calculated three-dimensional kinetic variables. Hip abduction and lumbosacral lateral flexion towards free leg side torques were exerted during almost the entire take-off phase, exerting positive power during the terminal 2/3 of the phase. The positive work of the hip abductors (1.08±0.30 J/kg) was as large as that of the ankle plantar-flexors, suggesting that the energy-generating potential of the hip abductors compares with that of the extensors of the stance-leg joints. The lumbosacral lateral flexors also performed positive work (0.36±0.18 J/kg), which was 47±25% of the knee extensors, albeit less than the extensors of the stance leg joints. The results implied that the hip abductors and lumbar lateral flexors have substantial potentials not only as stabilizers but also as energy generators and that they act as substantial energy generators during running single-leg jumps.