Analysis of the correlation between the differences in muscle strengths between the bilateral lower extremities and postural stability in healthy adults

Abstract

[Purpose] The purpose of this study was to examine the correlation between the differences in muscle strengths between the bilateral lower extremities and the level of postural sway that indicates postural stability. [Subjects and Methods] A total of 49 students (18 males and 31 females) at Y University in Gyeongsangnam-do, South Korea, participated in this study. Partial correlation analysis was performed to determine the effects of sway length and velocity on the differences in muscle strengths between the lower extremities. [Results] Both sway length and sway velocity showed a negative correlation with the difference in bilateral ankle dorsiflexion strength. Both sway length and sway velocity showed a positive correlation with the difference in bilateral hip flexion strength. [Conclusion] Difference in left-right muscle strengths of hip flexion and ankle dorsiflexion can affect postural stability when the levels of lower extremity muscle strengths are excluded.

Measuring Recovery and Understanding Long-Term Deficits in Balance, Ankle Mobility and Hip Strength in People after an Open Reduction and Internal Fixation of Bimalleolar Fracture and Their Impact on Functionality: A 12-Month Longitudinal Study

“…Our correlational results observed in the OMAS and AOFAS AH scores seem to support these findings; nevertheless, dynamic balance and hip strength also appeared as highly correlated factors. These findings are not surprising, as other authors have reported that both the ankle and hip neuromuscular complexes are important for a person's mobility and for performing functional skills [29,65,66]. Regarding the calf circumference measurement, we expected to find an association with the functional status of the PwAF, as this parameter is considered a good predictor of muscle mass and, therefore, muscle strength [67]; however, we did not find any significant correlation.…”

Quantifying balance deficit in people with ankle fracture six months after surgical intervention through the Y-Balance test

“…Interestingly, these balance impairments seem to be not only associated with the ankle dysfunction, but they could also be related to the collateral weakness of the other lower limbs, for example, the hip muscles [13,14].…”

“…The coordination between the neuromuscular hip and ankle complex is essential for postural stability, especially in those tasks with high balance demands induced by a reduced medial-lateral support base (e.g., one-leg stance, tandem stance, etc.). In these tasks, postural corrections carried out by ankle muscles cannot cope with the large body fluctuations that usually occur, requiring the coordinate participation of the hip muscles to keep the balance [13,14]. In a study using ultrasound imaging of the gluteal muscles, individuals with chronic ankle instability increased reliance on hip muscles compared to healthy people during a single leg reaching test [15].…”

Kineziterapijos Studentų Liemens Ir Kojų Raumenų Funkcinio Pajėgumo Bei Pusiausvyros Sąsajos

“…Mokslininkų tyrime, liemens raumenų ištvermė statistiškai reikšmingai koreliuoja su statine pusiausvyra [12]. M. Kim ir S. Kim savo tyrime ieškodami sąsajų tarp apatinių galūnių raumenų ir pusiausvyros, rado koreliaciją tarp statinės pusiausvyros ir šlaunį lenkiančių raumenų [13]. T. Muehlbauer su bendraautoriais sisteminėje straipsnių apžvalgoje išanalizavę 39 straipsnius, susijusius su apatinių galūnių raumenų jėga ir pusiausvyra (9 straipsniai atitiko mūsų tiriamųjų amžiaus grupę), rado labai silpną koreliaciją.…”