The influence of an additional load on rambling-trembling cop signal decomposition
Journal Title: Antropomotoryka. Journal of Kinesiology and Exercise Sciences - Year 2015, Vol 25, Issue 72
Abstract
Purpose: The aim of this study was to determine the contribution of additional body load on COP components using rambling and trembling signal decomposition. Basic procedures: Thirty healthy, untrained physical education students were examined. Static balance was assessed using a force platform with a sampling frequency of 100 Hz, which registered ground reaction forces and moments. The research projectconsisted of quiet standing (QS) trials performed in three different conditions: without extra load, with 7 kg and 10 kg extra load. All trials lasted 30 seconds and were repeated three times. The raw data were processed using MatLab. The following variables were analyzed: velocity COP (vCOP), range COP (raCOP), root mean square COP (rmsCOP). In addition, COP signals were decomposed on rambling and trembling components. Two-way analysis of variance with repeated-measures was performed to compare the results of different quiet standing conditions. The Bonferroni post-hoc test was applied to determine significant differences (level of significance: p< 0.05).Main findings: Significantly higher values of vCOP and v-tremb were observed between the first and third QS trials (p<0.05). Also, significantly higher values of ra-tremb and rms-tremb were registered between the first and second QS trials (p <0.05). Whereas significantly lower values of ra-ramb were observed between the first and third QS trials, as well between the second and third QS trials (p< 0.05).Conclusion: External body load increased the inertial force increasing range of COP sway, as evidenced by visible trembling components in each of the analyzed variables of quiet standing. Changes of different character were observed in rambling components.Extra load decreased the differences between extreme deviation of COP along the sagittal axes.
Authors and Affiliations
Justyna Szczepańska , Anna Kamieniarz , Grzegorz Juras , Kajetan J. Słomka
Keywords
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