Abstract：
OBJECTIVE: Tendons play a crucial role allowing the storage and release of mechanical energy during the running cycle. Running kinematics, including duty factor, constitute a basic element of the runner\'s biomechanics, and can determine their performance. This study aimed to analyze the link between Achilles tendon and plantar fascia morphology and running parameters, considering the influence of wearing shoes versus running barefoot.
METHODS: Cross-sectional study.
METHODS: 44 participants (30 men and 14 women) engaged in two running sessions, one with shoes and one without, both lasting 3 min at a consistent speed of 12 km/h. We captured running kinematic data using a photoelectric cell system throughout the sessions. Before the trials, we measured the thickness and cross-sectional area of both the Achilles tendon and plantar fascia using ultrasound.
RESULTS: The Pearson test revealed a significant correlation (p < 0,05) between Achilles tendon and plantar fascia morphology and contact time (r > -0.325), flight time (r > -0.325) and duty factor (ratio of ground contact to stride time) (r > -0.328) during barefoot running. During the shod condition, no significant correlation was found between connective tissue morphology and kinematic variables.
CONCLUSIONS: In barefoot running, greater size of the Achilles tendon and plantar fascia results in a reduced duty factor, attributed to longer flight times and shorter contact times.
METHODS: Cross-sectional study.
METHODS: 44 participants (30 men and 14 women) engaged in two running sessions, one with shoes and one without, both lasting 3 min at a consistent speed of 12 km/h. We captured running kinematic data using a photoelectric cell system throughout the sessions. Before the trials, we measured the thickness and cross-sectional area of both the Achilles tendon and plantar fascia using ultrasound.
RESULTS: The Pearson test revealed a significant correlation (p < 0,05) between Achilles tendon and plantar fascia morphology and contact time (r > -0.325), flight time (r > -0.325) and duty factor (ratio of ground contact to stride time) (r > -0.328) during barefoot running. During the shod condition, no significant correlation was found between connective tissue morphology and kinematic variables.
CONCLUSIONS: In barefoot running, greater size of the Achilles tendon and plantar fascia results in a reduced duty factor, attributed to longer flight times and shorter contact times.
摘要：
目的：肌腱在运行周期中起着至关重要的作用，允许机械能的存储和释放。运行运动学，包括占空比，构成跑步者生物力学的基本要素，并能决定他们的表现。本研究旨在分析跟腱与足底筋膜形态和运行参数之间的联系。考虑到穿鞋对赤脚跑步的影响。
方法：横断面研究。
方法：44名参与者（30名男性和14名女性）参加了两次跑步，一个有鞋子，一个没有，两者以12km/h的一致速度持续3分钟。在整个会话中，我们使用光电细胞系统捕获了运行的运动学数据。在审判之前,我们使用超声测量跟腱和足底筋膜的厚度和横截面积.
结果：Pearson检验显示跟腱和足底筋膜形态与接触时间（r>-0.325）之间存在显着相关性（p<0.05），赤脚跑步时的飞行时间（r>-0.325）和占空比（地面接触与跨步时间之比）（r>-0.328）。在穿鞋状态下，结缔组织形态学和运动学变量之间没有发现显著的相关性.
结论：赤脚跑步，跟腱和足底筋膜的更大尺寸导致占空比降低，归因于较长的飞行时间和较短的接触时间。
方法：横断面研究。
方法：44名参与者（30名男性和14名女性）参加了两次跑步，一个有鞋子，一个没有，两者以12km/h的一致速度持续3分钟。在整个会话中，我们使用光电细胞系统捕获了运行的运动学数据。在审判之前,我们使用超声测量跟腱和足底筋膜的厚度和横截面积.
结果：Pearson检验显示跟腱和足底筋膜形态与接触时间（r>-0.325）之间存在显着相关性（p<0.05），赤脚跑步时的飞行时间（r>-0.325）和占空比（地面接触与跨步时间之比）（r>-0.328）。在穿鞋状态下，结缔组织形态学和运动学变量之间没有发现显著的相关性.
结论：赤脚跑步，跟腱和足底筋膜的更大尺寸导致占空比降低，归因于较长的飞行时间和较短的接触时间。
