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Effect of wearing high-heeled shoes on postural control and foot loading symmetry

Blazkiewicz Michalina, Hadamus Anna

Acta of Bioengineering and Biomechanics

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2023

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Vol. 25, no. 4

EN

High-heeled shoes (HHS) play a particular role in the history of footwear [9]. The ancient Egyptians and Greeks wore shoes with raised heels for ceremonial and practical purposes. HHS gained popularity in Europe during the 15th century. Persian-inspired riding shoes with heels became fashionable among European aristocrats, both men and women. These shoes were a symbol of elite status. HHS fell out of favor for men in the latter half of the 18th century as fashion moved towards more practical and comfortable footwear [24]. However, heels remained popular among women, are still seen as a symbol of femininity and elegance, and have become an essential part of fashion [25].

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Influence of force-time parameters of hip abductors on maintaining balance in frontal plane in young healthy females

Bugalska Aneta, Hadamus Anna, Wójtowicz Sebastian, Daniluk Anna, Wiaderna Karolina, Grabowicz Marta

Acta of Bioengineering and Biomechanics

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2022

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Vol. 24, no. 1

4--8

EN

The aim of this study was to determine the impact of isometric and isokinetic hip abductor muscle strength on the quality of maintaining static balance in healthy subjects. Methods: The study enrolled 51 healthy women aged 18–25. Balance assessment was carried out according to the M-CTSIB protocol and Single Leg Stance Test (with eyes open and closed) using the Biodex Balance System. An isokinetic evaluation conducted at 30 °/s and an isometric evaluation of the hip abductors were performed with the Humac Norm system. Results: Regression analysis for Sway Index (SW) and Stability Index (ST) in bipedal standing showed a significant importance of the presence of visual feedback (RSW EO = –0.922; p < 0.0001; RST EO = –0.613; p = 0.0493), and unstable surface (RSW US = 1.253; p < 0.0001; RSW US = 2.547; p < 0.0001). Regression analysis for single-leg stance showed correlations between the following indices: overall sway index (OR) in single-leg stance, the antero-posterior (AP) sway index and the medio-lateral (ML) sway index on the one hand and isometric abduction time to peak torque (R OR TPT = 0.769; p = 0.0005; R AP TPT = 0.565; p = 0.008; R ML TPT = –1.74; p < 0.05, respectively) as well as the test conditions on the other. Conclusions: Physiological activation of the hip abductors may be important for physiological maintenance of postural balance in young people, in both leg standing as well as in single-leg stance. The present results warrant prospective, randomized studies of larger groups that are diversified with regard to age and gender of the participants.

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Effect of smooth eye tracking in different patterns on results of the modified Clinical Balance Sensory Integration Test in healthy young adults

Wójtowicz Sebastian, Łakoma Aleksandra, Ferenc Aneta, Daniluk Anna, Wiaderna Karolina, Hadamus Anna

Acta of Bioengineering and Biomechanics

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2022

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Vol. 24, no. 4

57--64

EN

The aim of the study was to determine whether eye tracking of a point moving in different directions influences balance test performance in young healthy subjects. Methods: The study enrolled 45 healthy young adults aged 19–26. Balance assessment was carried out according to the modified Clinical Balance Sensory Integration Test protocol using the Biodex Balance System with an additional 63” screen to present the eye-tracking task. Each participant repeated measurements in standing on a stable and foam surface in six test conditions: two without eye tracking with eyes open and eyes closed, and four with eye tracking: with vertical, horizontal, star, and circle moving point. Each trial lasted 30 sec. Results: Regression analysis for the Sway Index showed that there was no impact of eye tracking on test results ( p = 0.4326), although detailed analysis showed a significant impact of tracking a point moving in a circle in standing on a foam surface ( p < 0.001). Conclusions: The presented results show that eye-tracking does not influence the results of the balance test with exception of eye-tracking of the circle movement in standing on a foam surface. It suggests that eye movements may affect the test results when performing more difficult balance tests.