a College of Engineering , Shibaura Institute of Technology , Saitama , Japan.
b Faculty of Sport Sciences , Waseda University , Saitama , Japan.
Eur J Sport Sci. 2018 Nov;18(10):1338-1345. doi: 10.1080/17461391.2018.1499134. Epub 2018 Jul 23.
Prolonged running results in lowering of the foot arch and a low arch is associated with subsequent chronic injuries. Foot posture alteration and recovery following a marathon run remain unknown. Therefore, the present study aimed to evaluate foot posture alteration following a full marathon run. The three-dimensional foot posture data of 11 collegiate runners were obtained using an optical foot scanner system before, and immediately, 1 day, 3 days, and 8 days after a full marathon. The navicular height and arch height ratio significantly decreased from before to immediately, 1 day, 3 days, and 8 days after the marathon (navicular height: before, 44.2 ± 5.0 mm; immediately after, 39.4 ± 5.5 mm; 1 day, 37.7 ± 6.2 mm; 3 days, 38.7 ± 5.5 mm; 8 days, 37.6 ± 5.7 mm; arch height ratio: before, 18.4 ± 1.9; immediately after, 16.5 ± 2.5; 1 day, 15.7 ± 2.5; 3 days, 16.2 ± 2.6; 8 days, 15.6 ± 2.2, P < 0.001, respectively). By contrast, the dorsal height significantly increased from before and immediately after to 1 day after the marathon, and then significantly decreased until 8 days after the marathon (P < 0.001). These results indicate that the recovery patterns of the dorsal and navicular heights following a marathon did not coincide; the dorsal height rose temporally at 1 day after and subsequently decreased, but the navicular height decreased throughout the 8-day period after the marathon. More than one week may be necessary for sufficient foot alignment recovery from marathon-induced changes.
长跑会导致足弓降低，而低足弓与随后的慢性损伤有关。马拉松跑后足弓的改变和恢复情况尚不清楚。因此，本研究旨在评估全马跑后足弓的改变。使用光学足扫描仪系统，在马拉松前、立即、第 1 天、第 3 天和第 8 天，获取 11 名大学生跑者的三维足姿数据。足舟骨高度和足弓高度比从马拉松前到立即、第 1 天、第 3 天和第 8 天显著降低（足舟骨高度：马拉松前，44.2±5.0 mm；立即，39.4±5.5 mm；第 1 天，37.7±6.2 mm；第 3 天，38.7±5.5 mm；第 8 天，37.6±5.7 mm；足弓高度比：马拉松前，18.4±1.9；立即，16.5±2.5；第 1 天，15.7±2.5；第 3 天，16.2±2.6；第 8 天，15.6±2.2，P<0.001）。相比之下，背高从马拉松前和立即增加到第 1 天，然后直到第 8 天显著降低（P<0.001）。这些结果表明，马拉松后背高和足舟骨高度的恢复模式并不一致；背高在第 1 天暂时升高，随后下降，但足舟骨高度在马拉松后 8 天内持续下降。从马拉松引起的变化中充分恢复足弓排列可能需要一周以上的时间。
