Abstract
The aim of this study was to determine the relationship between strength of ankle plantar and dorsal flexors and range of motion (RoM), and body sway variables during single-leg quiet stance, in highly trained athletes. The participants for this study were young athletes from 9 disciplines (n = 655). Center of pressure (CoP) velocity, amplitude, and frequency were measured during single-leg quiet stance. Moreover, athletes were measured for passive ankle plantar flexion (PF) and dorsal flexion (DF) RoM, and for rate of torque development (RTD) in the 0–50 (RTD50) and 0–200 ms time windows (RTD200). Ankle strength and RoM could not predict CoP velocity total, anterior–posterior (AP), and medial–lateral (ML) (p > 0.05). However, PFRTD50 and PFRoM and PFRoM positively influenced CoP amplitude in ML direction (p < 0.001, R2 = 0.10). Moreover, CoP frequency in ML direction significantly increased with lower PFRTD50, DFRTD50, DFRTD200, PFRoM, and DFRoM (p < 0.05). We have demonstrated that ankle strength and RoM were related to single-leg quiet stance postural balance in trained athletes. The ankle RoM showed the greatest influence on CoP variables in ML directions.
Highlights
The aim of this study was to determine the relationship between strength of ankle plantar and dorsal flexors and range of motion (RoM), and body sway variables during single-leg quiet stance, in highly trained athletes
The results revealed that postural sway was negatively influenced by muscle strength of plantar flexors (PF) and dorsal flexion (DF), and ankle plantar flexion (PF) RoM
Similar results were found for the relationship of PF RoM and body sway variables with negative and weak correlations found in Center of pressure (CoP) velocity (r from − 0.07 to − 0.09) and CoP frequency (r from − 0.08 to − 0.19) and positive correlations with CoP amplitude in medial– lateral (ML) directions (r = 0.12–0.13)
Summary
The aim of this study was to determine the relationship between strength of ankle plantar and dorsal flexors and range of motion (RoM), and body sway variables during single-leg quiet stance, in highly trained athletes. We have demonstrated that ankle strength and RoM were related to single-leg quiet stance postural balance in trained athletes. Postural balance is the ability to maintain control of the body position above the surface of the support[1] which is necessary during the performance of various activities of daily living It is one the most important skills that protect athletes from injury. Basketball Dance Soccer Track and field Volleyball Alpine skiing Tennis Martial arts Speed skating the relationship between bipedal quiet stance postural sway (CoP length and velocity), ankle RoM, and lowerextremity muscle strength. Another study showed that low ROM of PF was negative related to overall balance in students aged 20 years[25]
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