Joseph Michael F, Histen Katherine, Arntsen Julia, L'Hereux Lauren, Defeo Carmine, Lockwood Derek, Scheer Todd, Denegar Craig R
J Sport Rehabil. 2017 Apr;26(2):165-170. doi: 10.1123/jsr.2016-0007. Epub 2016 Sep 6.
Achilles tendons (ATs) adapt to increased loading generated by long-term adoption of a minimalist shoe running style. There may be difference in the chronology and extent of adaptation between the sexes.
To learn the chronology of AT adaptations in female and male runners who transitioned to a minimalist running style through a planned, progressive 12-wk transition program.
Prospective cohort study of well-trained, traditionally shod runners who transitioned to minimalist shoe running.
Repeated laboratory assessment at baseline and 3, 12, and 24 wk after initiating transition program.
Fifteen women and 7 men (of 29 enrolled) completed the study.
The authors used diagnostic ultrasound and isokinetic dynamometry to generate a force elongation curve and its derivatives at each time point.
Greater adaptations were observed in men than in women, with men generating more force and having greater increases in CSA, stiffness, and Young's modulus and less elongation after 12 wk of training.
Men demonstrated changes in AT properties that were consistent with increased loading of the triceps surae during exercise. The women demonstrated far smaller changes. Further investigation is warranted to understand when adaptations may occur in women and the implications of altered AT mechanical properties for performance and injury risk.
跟腱会适应长期采用极简主义跑鞋跑步方式所产生的增加负荷。男女之间在适应的时间顺序和程度上可能存在差异。
了解通过一项有计划的、循序渐进的12周过渡计划转变为极简主义跑步方式的男女跑步者跟腱适应的时间顺序。
对训练有素、习惯穿传统跑鞋的跑步者转变为穿极简主义跑鞋跑步进行前瞻性队列研究。
在开始过渡计划后的基线、3周、12周和24周进行重复的实验室评估。
29名受试者中，15名女性和7名男性完成了研究。
作者在每个时间点使用诊断超声和等速测力法生成力伸长曲线及其导数。
男性比女性观察到更大的适应性变化，训练12周后，男性产生更大的力，横截面积、刚度和杨氏模量增加更多，伸长更少。
男性跟腱特性的变化与运动过程中腓肠肌三头肌负荷增加一致。女性的变化要小得多。有必要进行进一步研究，以了解女性何时可能出现适应性变化，以及跟腱力学特性改变对运动表现和受伤风险的影响。
