Xu Jennifer, Goss Dante D, Saliba Susan A
Kinesiology University of Virginia.
Int J Sports Phys Ther. 2023 Aug 1;18(4):997-1008. doi: 10.26603/001c.84310. eCollection 2023.
Intrinsic foot muscle (IFM) weakness can result in reduced foot function, making it crucial for clinicians to track IFM strength changes accurately. However, assessing IFM strength can be challenging for clinicians, as there is no clinically applicable direct measure of IFM strength that has been shown to be reliable and valid with the foot on the ground.
The purpose was to investigate the intra-rater and inter-rater reliability of a novel, budget-friendly IFM dynamometer and determine its agreement with a handheld dynamometer (HHD). The researchers also examined correlations of foot morphology and activity level to IFM strength.
Descriptive Laboratory Study.
Two assessors measured IFM strength of 34 healthy volunteers (4 male, 30 female; age=21.14±2.57, height=164.66 ±7.62 cm, mass=64.45±11.93 kg) on two occasions 6.62±0.78 days apart with the novel dynamometer to assess intra- and inter-rater reliability. The HHD was used to measure IFM in the first session in order to assess validity.
For the novel dynamometer, intra- and inter-rater reliability was moderate-to-excellent (ICC = 0.73 - 0.95), and the majority of the strength tests were within the 95% limits of agreement with the HHD. Wider foot morphology and a higher number of days walking over the prior seven days had small but significant correlations with IFM strength (dominant foot r = 0.34, non-dominant foot r = 0.39; r = -0.33, -0.39 respectively).
This novel IFM dynamometer is a budget-friendly ($75) tool that was shown to be reliable and valid in a healthy population.
Level 3©The Author(s).
足部固有肌（IFM）无力会导致足部功能下降，因此临床医生准确追踪IFM力量变化至关重要。然而，评估IFM力量对临床医生来说可能具有挑战性，因为目前尚无已证明在足部着地时可靠且有效的临床适用的IFM力量直接测量方法。
本研究旨在探究一种新型、经济实惠的IFM测力计的评分者内和评分者间信度，并确定其与手持测力计（HHD）的一致性。研究人员还考察了足部形态和活动水平与IFM力量的相关性。
描述性实验室研究。
两名评估者使用新型测力计，对34名健康志愿者（4名男性，30名女性；年龄=21.14±2.57岁，身高=164.66±7.62厘米，体重=64.45±11.93千克）进行两次IFM力量测量，测量间隔时间为6.62±0.78天，以评估评分者内和评分者间信度。在第一次测量时使用HHD测量IFM，以评估效度。
对于新型测力计，评分者内和评分者间信度为中等至优秀（组内相关系数=0.73 - 0.95），并且大多数力量测试结果在与HHD的95%一致性界限内。更宽的足部形态和在前七天内更多的行走天数与IFM力量存在小但显著的相关性（优势脚r = 0.34，非优势脚r = 0.39；r分别为-0.33、-0.39）。
这种新型IFM测力计是一种经济实惠（75美元）的工具，在健康人群中被证明是可靠且有效的。
3级©作者。
