Ridge Sarah Trager, Myrer J William, Olsen Mark T, Jurgensmeier Kevin, Johnson A Wayne
Department of Exercise Sciences, Brigham Young University, Provo, UT 84602 USA.
J Foot Ankle Res. 2017 Dec 8;10:55. doi: 10.1186/s13047-017-0237-y. eCollection 2017.
Quantifying the strength of the intrinsic foot muscles has been a challenge for clinicians and researchers. The reliable measurement of this strength is important in order to assess weakness, which may contribute to a variety of functional issues in the foot and lower leg, including plantar fasciitis and hallux valgus. This study reports 3 novel methods for measuring foot strength - doming (previously unmeasured), hallux flexion, and flexion of the lesser toes.
Twenty-one healthy volunteers performed the strength tests during two testing sessions which occurred one to five days apart. Each participant performed each series of strength tests (doming, hallux flexion, and lesser toe flexion) four times during the first testing session (twice with each of two raters) and two times during the second testing session (once with each rater). Intra-class correlation coefficients were calculated to test for reliability for the following comparisons: between raters during the same testing session on the same day (inter-rater, intra-day, intra-session), between raters on different days (inter-rater, inter-day, inter-session), between days for the same rater (intra-rater, inter-day, inter-session), and between sessions on the same day by the same rater (intra-rater, intra-day, inter-session).
ICCs showed good to excellent reliability for all tests between days, raters, and sessions. Average doming strength was 99.96 ± 47.04 N. Average hallux flexion strength was 65.66 ± 24.5 N. Average lateral toe flexion was 50.96 ± 22.54 N.
These simple tests using relatively low cost equipment can be used for research or clinical purposes. If repeated testing will be conducted on the same participant, it is suggested that the same researcher or clinician perform the testing each time for optimal reliability.
对临床医生和研究人员而言，量化足部内在肌肉的力量一直是一项挑战。可靠地测量这种力量对于评估肌无力很重要，因为肌无力可能导致足部和小腿的各种功能问题，包括足底筋膜炎和拇外翻。本研究报告了3种测量足部力量的新方法——足弓隆起（此前未测量过）、拇趾屈曲和小趾屈曲。
21名健康志愿者在相隔1至5天的两次测试环节中进行力量测试。每位参与者在第一次测试环节中对每个系列的力量测试（足弓隆起、拇趾屈曲和小趾屈曲）进行4次（两名评估者各进行2次），在第二次测试环节中进行2次（每位评估者各进行1次）。计算组内相关系数以测试以下比较的可靠性：同一天同一测试环节中评估者之间（评估者间、日内、 session内）、不同天的评估者之间（评估者间、日间、 session间）、同一评估者不同天之间（评估者内、日间、 session间）以及同一天同一评估者不同session之间（评估者内、日内、 session间）。
组内相关系数显示，所有测试在不同天、评估者和session之间均具有良好至优异的可靠性。平均足弓隆起力量为99.96±47.04N。平均拇趾屈曲力量为65.66±24.5N。平均外侧趾屈曲力量为50.96±22.54N。
这些使用成本相对较低设备的简单测试可用于研究或临床目的。如果要对同一参与者进行重复测试，建议每次由同一位研究人员或临床医生进行测试以获得最佳可靠性。
