Eastern Washington University, 526 5(th) St, Cheney, WA 99004, United States; University of Nevada, Las Vegas, 4505 S Maryland Pkwy, Las Vegas, NV 89154, United States.
University of Nevada, Las Vegas, 4505 S Maryland Pkwy, Las Vegas, NV 89154, United States.
Clin Biomech (Bristol). 2022 Jul;97:105712. doi: 10.1016/j.clinbiomech.2022.105712. Epub 2022 Jun 27.
The biomechanical factors related to plantar fasciitis are not well understood. A history of injury is considered a risk factor for subsequent injury, but it is unknown if differences in mechanics exist before, during, and after injury. This study compared gait mechanics among individuals with plantar fasciitis, resolved plantar fasciitis, and uninjured controls.
Thirty male and female runners were divided into three groups: 1) plantar fasciitis (n = 10, age 43 ± 11 years); 2) resolved plantar fasciitis (n = 10, age 43 ± 13 years); and 3) control (n = 10, age 38 ± 11 years). Participants ran at preferred velocity and 3.3 m/s while kinematics and kinetics were collected. Variables of interest include vertical loading rate, foot, ankle, knee, and hip kinematics, arch height index, arch rigidity index, and arch drop. Group differences were analyzed at each velocity using one-way analysis of variance.
The plantar fasciitis group exhibited less forefoot extension (P = 0.02), more midfoot inversion (P < 0.01), and more midfoot extension (P < 0.01) than the resolved plantar fasciitis group. Foot mechanics in controls did not differ. Sagittal knee range of motion was greater in the plantar fasciitis group than resolved or control (P = 0.01). No other variables were significantly different among groups.
The plantar fasciitis group exhibited dynamic foot mechanics which suggest a lower, more flexible arch compared to the resolved group, although static measures of foot structure and ankle motion did not differ. The differences between these groups indicate that the motion of the forefoot and midfoot during gait are important to consider for plantar fasciitis.
与足底筋膜炎相关的生物力学因素尚未得到很好的理解。受伤史被认为是随后受伤的一个危险因素，但尚不清楚在受伤前、受伤期间和受伤后力学是否存在差异。本研究比较了足底筋膜炎、足底筋膜炎已愈合和未受伤对照组个体的步态力学。
30 名男性和女性跑步者分为三组：1）足底筋膜炎（n=10，年龄 43±11 岁）；2）足底筋膜炎已愈合（n=10，年龄 43±13 岁）；3）对照组（n=10，年龄 38±11 岁）。参与者以自身喜好的速度和 3.3m/s 跑步，同时收集运动学和动力学数据。感兴趣的变量包括垂直加载率、足部、踝关节、膝关节和髋关节运动学、足弓高度指数、足弓刚性指数和足弓下降。使用单因素方差分析比较各速度下各组之间的差异。
足底筋膜炎组前足伸展度较小（P=0.02），中足内翻度较大（P<0.01），中足伸展度较大（P<0.01），与足底筋膜炎已愈合组相比。对照组的足部力学无差异。与足底筋膜炎组或对照组相比，膝关节矢状面活动范围更大（P=0.01）。组间无其他变量差异。
与已愈合组相比，足底筋膜炎组表现出动态足部力学特征，提示其足弓更低、更灵活，尽管静态足结构和踝关节运动测量无差异。这些组之间的差异表明，在步态中前足和中足的运动对于足底筋膜炎很重要。
