Impact of foot pronation on postural stability: An observational study

Abstract

Foot pronation affects the postural stability at stability level four and not affects stability level eight compared with those in the control group.

The Influence of Pronated Foot Posture on Knee Isokinetic Strength, Static and Dynamic Postural Stability in Healthy Young Individuals

“…A pronated foot posture leads not only to mechanical changes, but also to somatosensory alterations [5], and may therefore affect static and dynamic postural stability. As with the results of previous studies [6,15,17,18], the change of postural stability in pronated foot groups was also identified in present study. In particular, our study found the significant differences and correlations in some parameters of dynamic stability under eyes-closed condition.…”

“…The static stability index under the eyes-open and eyes-closed conditions in the current study may therefore not show significant differences regardless of different foot postures. Koura et al [6] also assumed that the level of difficulty in the dynamic balance test may affect their results; in their study, pronated and neutral foot groups were tested at two different BBS stability levels (levels 8 and 4), and a significant difference was found only at the relatively difficult stability level (level 4), which they concluded allows more foot displacement than the easier stability level at which no significant difference was found. Therefore, relatively easy BBS stability levels or task levels might be inappropriate Additionally, according to Tables 3 and 5, no significant results were found in the dynamic APSI under the eyes-closed condition, and there may be a difference in postural stability between the anterior-posterior (AP) direction and the mediallateral (ML) direction.…”

“…A pronated foot-or flat foot-has a low medial longitudinal arch height that causes overuse stresses in the muscles, tendons, and ligaments of the foot [6,7]. A pronated foot causes tibial internal rotation, which also affects the lower limb and the entire musculoskeletal system [8,9].…”

“…Even small changes in the foot, such as altered afferent feedback and muscle weakness, can also affect whole-postural stability [15,16]. Previous studies have reported that those with pronated foot have poorer postural stability than those with neutral foot [6,15,17,18]. In a study by Tsai et al [17], pronated and supinated foot groups had poorer postural stability than neutral foot groups, however Hyong and Kang [19] reported no significant differences in the dynamic postural stability of different foot postures.…”

Association between Foot Posture Asymmetry and Static Stability in Patients with Knee Osteoarthritis: A Case-Control Study

“…Previous studies [8][9][10][11] suggested that there were some connections between FPI and KOA. On the one hand, it was reported that some impairments of balance and stability were detected in patients with KOA [12], and FPI was associated with balance and postural stability [13,14], which was very important to reduce the risk of falling in the elderly [15]. On the other hand, it has been proved that there is a biomechanical link between foot posture and adduction moment/altered frontal knee alignment [8], and supinated FPI is related to pain, function in KOA patients [10].…”