Neurophysiology-based Intervention of Foot Dysfunction in Sportive Children

Primary Outcomes (5)

• Change from baseline Foot type at 4 weeks

  The foot type was assessed using the reliable and valid clinical test Foot posture index (6-FPI) which examine 6 items of the foot: talar head position, inversion/eversion of the calcaneus, talonavicular bulging, medial longitudinal arch height, forefoot abd/adduction, each by the point 0 for neutral, +1 and +2 for pronated, and -1 and -2 for supinated position as defined by Redmont et al. (2008). Total score of the 6 items defines foot type as neutral (0 to +5), pronated (+6 to +9), over-pronated (+10 to +12), supinated (-1 to -4) and over-supinated (-5 to -12).

  at baseline and in 4 weeks

• Change from baseline Medial longitudinal arch height at 4 weeks

  The medial longitudinal arch height (MLAH) was assessed by Chippaux-Smirak index (CSI) from digital foot print obtained from pressure mat during single-leg standing. The software Kinovea was used for the normalization the foot print to real foot size and measuring the widest part of the forefoot and the narrowest part of the midfoot in millimeters. Finally, the index was calculated: the narrowest part was divided by widest part and multiply by 100 to obtain total percentage. Total percentage of the CSI ranges in 5 types of MLAH: high 0-0.1%, normal 0.1-29.9%, transitional 30-39.9%, lowered 40-45%, mild flat 45.1-50%, moderate flat 50.1-60%, severe flat 60.1-100% (Onodera et al., 2008; Nikolaidou and Boudolos, 2006).

  at baseline and in 4 weeks

• Change from baseline Foot dynamic function at 4 weeks

  The foot dynamic function was measured by Centre of pressure excursion index (CPEI) during normal walking on pressure platform RS Footscan (Gait 7.7). The imposed digital footprint with centre of pressure (COP) trajectory was firstly normalised for the real foot size and measured in software Kinovea to obtain the foot measures: Line A connect the initial point and final point of the COP trajectory, line B was drawn perpendicular to the line A in the widest part of the forefoot, line C was a partial section of the line B between crossing points with line A and COP trajectory. Final calculation of CPEI was done: Line C divided by line B multiplied 100 to obtain total percentage. According to previous studies (Hillstrom et al., 2013; Song et al., 1996), the sample results were divided into thirds: CPEI 10-24.9% for over-pronation, CPEI 25-34.9% for optimal function, and CPEI above 35% for supinated function.

Conditions