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Influence of feet’s position on maximum forward lean using a new estimate of functional balance

Wysogląd Maria Anna, Michalska Justyna, Nowakowski Lukasz, Słomka Kajetan

Acta of Bioengineering and Biomechanics

2022

Vol. 24, no. 3

49--55

Functional stability is crucial to the daily activity of an independent person. Functional balance testing is widely used in laboratories and has proven to be a reliable indicator of fall risk. So far, only few studies have paid attention to the impact of foot positioning on the results of functional balance measurements. Thirty healthy adults took part in experiment. LOS test was performed for four stance positions: preferred width, wide stance (feet parallel, 28 cm apart), narrow stance (feet together) and angle stance (heels together, toes pointing outside, 90° angle between them) with eyes opened and closed. The results of the study show significant differences between angle and narrow stance according to wide and preferred width stances – angle and narrow positions didn’t allow participants to lean as far as other positions. Vision had stabilizing influence on maximum forward lean in all tested positions.

Assessment of dynamic balance during step initiation in Parkinson’s disease patients and elderly – a validity study

Juras Grzegorz, Kamieniarz Anna, Michalska Justyna, Słomka Kajetan

Acta of Bioengineering and Biomechanics

2020

Vol. 22, no. 1

3--10

The aim of this study was to evaluate the reliability of the novel posturographic procedure and to investigate the relationships between parameters of this procedure and clinical tests. We hypothesised the proposed step initiation procedure to be reliable method of balance and motor disability assessment, especially in patients with neurological deficits. Also, we assumed high significant correlation between parameters of step initiation procedures and clinical tests. Methods: The 35 subjects with idiopathic PD and 35 agedmatched healthy controls participated in this study. The gait initiation was measured using two force platforms. The procedure consisted of three phases: (1) quiet standing on a first platform (2) crossing on the second platform, (3) quiet standing on a second platform. Testing was carried out in four conditions: unperturbed trial, obstacle crossing, step-up and step-down. Results: In the proposed gait initiation procedure, the vCOP, raCOP and rmsCOP showed an excellent reliability (ICC > 0.80). For transit phase, reliability of all variables in all conditions also was excellent (ICC = 0.8–0.9). There were only a few associations between Tinetti scores and posturographic variables in controls, but in PD patients the significant correlations were found between the proposed measures and the UPDRS, Tinetti, FRT, TUG and with the BBS. Conclusions: The proposed gait initiation procedure is reliable and very suitable for the assessment of patients with Parkinson’s disease. It can be used as an objective assessment of the clinical condition and dynamic balance, and help in the designing and programming of the appropriate rehabilitation and treatment.