Department of Kinesiology, University of Virginia, 210 Emmet Street South, Charlottesville, VA 22904-4407, USA; Warfighter Performance Department, Naval Health Research Center, San Diego, CA.
Department of Kinesiology, University of Virginia, 210 Emmet Street South, Charlottesville, VA 22904-4407, USA.
Foot (Edinb). 2021 Mar;46:101717. doi: 10.1016/j.foot.2020.101717. Epub 2020 Jul 6.
Descriptive Laboratory OBJECTIVES: To assess change in foot morphology across loading using innovative, clinically accessible 3-dimesional composite measurements of surface area (SA), volume (V), and SA:V ratio in recreationally-active young adults.
The feet of 53 female [mean age:20.7 ± 3.8 years, BMI:23.9 ± 4.2 kg m, foot posture index (FPI):3.8 ± 3.7] and 31 male participants (mean age:20.8 ± 2.4 years, BMI:23.7 ± 2.5 kg m, FPI:3.8 ± 4.1) were evaluated. FPI was assessed and foot length, width, and dorsal arch height were measured in sitting and bipedal standing and used to calculate the SA and V of a quarter-ellipsoid. ΔSA characterized foot widening and lengthening and ΔV characterized arch deformation during loading. The SA:V represented changes in both foot size and shape. Linear regression was performed to assess the effects of component foot change measures during loading on the composite measurements. The composite measures were compared to the established measures of ΔArch Height Index (ΔAHI), Arch Flexibility, Foot Mobility Magnitude (FMM), and FPI.
Foot width and dorsal arch height change measures were significant predictors (p < 0.001) for the ΔV and SA:V composite measures, explaining 90-91% of the variance. Significant fair to good associations (p < .05) were found between the novel and established composite measures: ΔSA: Arch flexibility (r=-0.27); SA:V: ΔAHI (r=-0.57), Arch Flexibility (r=-0.75), FMM (r=-0.30), FPI (r = 0.42).
Quarter-ellipsoid measures calculated from morphologic measurements may have clinical utility in quantifying 3-dimensional foot changes during loading and may be useful when assessing need and response to clinical interventions.
描述性实验室
使用创新的、临床可及的三维复合表面面积（SA）、体积（V）和 SA:V 比测量方法，评估在娱乐性活动的年轻成年人中，足部在负重下的形态变化。
对 53 名女性（平均年龄：20.7 ± 3.8 岁，BMI：23.9 ± 4.2 kg/m，足弓指数（FPI）：3.8 ± 3.7）和 31 名男性参与者（平均年龄：20.8 ± 2.4 岁，BMI：23.7 ± 2.5 kg/m，FPI：3.8 ± 4.1）的足部进行了评估。在坐姿和双足站立位评估 FPI，并测量足部长度、宽度和背弓高度，用于计算四分之一椭圆的 SA 和 V。ΔSA 用于表征足部在负重时的增宽和延长，ΔV 用于表征足弓变形。SA:V 代表足部大小和形状的变化。进行线性回归分析，以评估负重期间各足部变化测量值对复合测量值的影响。将复合测量值与已建立的 ΔArch Height Index（ΔAHI）、足弓灵活性、足移动幅度（FMM）和 FPI 测量值进行比较。
足部宽度和背弓高度变化测量值是 ΔV 和 SA:V 复合测量值的显著预测因子（p < 0.001），解释了 90-91%的方差。新型和已建立的复合测量值之间存在显著的良好相关性（p < 0.05）：ΔSA：足弓灵活性（r=-0.27）；SA:V：ΔAHI（r=-0.57）、足弓灵活性（r=-0.75）、FMM（r=-0.30）、FPI（r = 0.42）。
从形态学测量值计算出的四分之一椭圆测量值可能具有在负重期间量化三维足部变化的临床应用价值，并且在评估临床干预的需求和反应时可能很有用。
