Ritsumeikan University.
J Appl Biomech. 2021 Feb 1;37(1):30-35. doi: 10.1123/jab.2020-0125. Epub 2020 Nov 10.
This study examined the relationship between Achilles tendon (AT) length and 100-m sprint time in sprinters. The AT lengths at 3 different portions of the triceps surae muscle in 48 well-trained sprinters were measured using magnetic resonance imaging. The 3 AT lengths were calculated as the distance from the calcaneal tuberosity to the muscle-tendon junction of the soleus, gastrocnemius medialis, and gastrocnemius lateralis, respectively. The absolute 3 AT lengths did not correlate significantly with personal best 100-m sprint time (r = -.023 to .064, all Ps > .05). Furthermore, to minimize the differences in the leg length among participants, the 3 AT lengths were normalized to the shank length, and the relative 3 AT lengths did not correlate significantly with personal best 100-m sprint time (r = .023 to .102, all Ps > .05). Additionally, no significant correlations were observed between the absolute and relative (normalized to body mass) cross-sectional areas of the AT and personal best 100-m sprint time (r = .012 and .084, respectively, both Ps > .05). These findings suggest that the AT morphological variables, including the length, may not be related to superior 100-m sprint time in sprinters.
本研究探讨了跟腱（AT）长度与短跑运动员 100 米短跑时间之间的关系。通过磁共振成像测量了 48 名训练有素的短跑运动员小腿三头肌 3 个不同部位的 AT 长度。这 3 个 AT 长度分别为跟骨结节到比目鱼肌、腓肠肌内侧头和腓肠肌外侧头的肌腱结合处的距离。绝对 AT 长度与个人最佳 100 米短跑时间无显著相关性（r = -.023 至.064，均 P >.05）。此外，为了最小化参与者之间腿长的差异，将 3 个 AT 长度归一化到小腿长度，相对 AT 长度与个人最佳 100 米短跑时间也无显著相关性（r =.023 至.102，均 P >.05）。此外，AT 的绝对和相对（相对于身体质量的归一化）截面积与个人最佳 100 米短跑时间之间也无显著相关性（r =.012 和.084，均 P >.05）。这些发现表明，包括长度在内的 AT 形态学变量与短跑运动员的 100 米短跑时间无关。
