Department of Human Kinetics, Université du Québec à Trois-Rivières, Canada; Groupe de recherche sur les affections neuromusculosquelettiques (GRAN), Université du Québec à Trois-Rivières, Canada.
Department of Human Kinetics, Université du Québec à Trois-Rivières, Canada.
Foot (Edinb). 2024 Sep;60:102121. doi: 10.1016/j.foot.2024.102121. Epub 2024 Jul 26.
Plantar fasciopathy is a common foot-related musculoskeletal disorder. It has been hypothesized that this disorder could be linked to a dysfunctional windlass mechanism. However, no study to date has quantified this link to validate or refute this hypothesis. The first metatarsophalangeal joint (1st MPJ) dorsiflexion resistance test is a reliable test to evaluate the force required to initiate the windlass mechanism. Comparing the results of this test in individuals with and without plantar fasciopathy will allow for a better understanding of the relationship between plantar fasciopathy and the windlass mechanism. Thus, this study aimed to compare 1st MPJ dorsiflexion resistance in individuals with plantar fasciopathy and healthy controls. Additionally, this study aimed to explore the correlations between 1st MPJ dorsiflexion resistance and other commonly used foot orthopedic tests, specifically the supination resistance test and the Foot Posture Index.
Twenty participants with plantar fasciopathy and 20 healthy controls were recruited in this case-control study. First MPJ dorsiflexion resistance was quantified and compared between groups and between feet using a repeated measures ANOVA with one within-subject factor with two levels and one between-subject factor with two levels. It was also correlated with supination resistance and the Foot Posture Index.
There were no significant differences in 1st MPJ dorsiflexion resistance between injured and healthy feet as well as control and plantar fasciopathy groups. There was a moderate to strong correlation (r = 0.674 to 0.891) between 1st MPJ dorsiflexion resistance and supination resistance in both groups. There was no significant correlation between 1st MPJ dorsiflexion resistance and the Foot Posture Index.
The lack of alterations in 1st MPJ dorsiflexion resistance among individuals with plantar fasciopathy implies a potential need to reconsider the biomechanical model, proposing that a dysfunctional windlass mechanism is associated with the development of plantar fasciopathy, may need reconsideration.
足底筋膜炎是一种常见的足部肌肉骨骼疾病。据推测，这种疾病可能与功能失调的弹弓机制有关。然而，迄今为止，没有研究量化这种联系来验证或反驳这一假设。第一跖趾关节（1st MPJ）背屈阻力测试是评估启动弹弓机制所需力的可靠测试。比较足底筋膜炎患者和无足底筋膜炎患者的测试结果，可以更好地了解足底筋膜炎与弹弓机制之间的关系。因此，本研究旨在比较足底筋膜炎患者和健康对照组的 1st MPJ 背屈阻力。此外，本研究旨在探索 1st MPJ 背屈阻力与其他常用足部矫形测试（特别是旋后阻力测试和足部姿势指数）之间的相关性。
本病例对照研究招募了 20 名足底筋膜炎患者和 20 名健康对照者。使用重复测量方差分析，对 1st MPJ 背屈阻力进行了定量分析，并比较了组间和组内双脚的差异，其中一个因素为组间因素（两个水平），一个因素为组内因素（两个水平）。还与旋后阻力和足部姿势指数进行了相关性分析。
在受伤脚和健康脚之间，以及在对照组和足底筋膜炎组之间，1st MPJ 背屈阻力没有显著差异。在两组中，1st MPJ 背屈阻力与旋后阻力之间存在中度至高度相关性（r=0.674 至 0.891）。1st MPJ 背屈阻力与足部姿势指数之间无显著相关性。
足底筋膜炎患者 1st MPJ 背屈阻力没有改变，这意味着可能需要重新考虑生物力学模型，提出功能失调的弹弓机制与足底筋膜炎的发展有关的假设可能需要重新考虑。
