Sensorimotor training and the changes in bioelectric activity in select muscles in visually impaired women over 50 years old
Journal Title: Antropomotoryka. Journal of Kinesiology and Exercise Sciences - Year 2013, Vol 23, Issue 61
Abstract
Aim of the study. The purpose of this study was to assess the changes of the bioelectrical activity of muscles in visually impaired women aged between 50 and 65 years under the influence of one-time sensorimotor training with Thera-Band stability trainers.Material and methods. The study included the experimental group E, comprised of 30 women aged between 50 and 65 years with category II and III visual impairment, and the control group C containing 30 women of similar age with normal sight. The measurements were taken prior to and after exercising with Thera-Band stability trainers, with the subjects standing freely or maximally leaned forward and backward, both with eyes open (EO) and eyes closed (EC). The EMG signal was registered with the four-channel method using superficially placed electrodes. The following four muscles were examined: tibial anterior muscle, soleus muscle, and the medial and lateral head of gastrocnemius muscle.Results.Significant reduction in the bioelectrical activity of tibial anterior muscle (P<0.05) and soleus muscle (P≤0.05) was documented in both studied groups after sensorimotor training, along with only isolated significant changes in the activity of the gastrocnemius muscle in the control group. In addition, statistically significant differences were observed in the experimental group in relation to the tibialis anterior: (P≤0.05) and the soleus (P≤0.05 or P<0.01) compared to the control group. Further statistical analysis conducted in group E revealed significant variance in the model of changes in the tibialis anterior muscle activity (Chi2ANOVA = 125.845, P<0.001) in all measurements. In contrast, significant variance in the model of changes in the activity of the tibialis anterior (Chi2ANOVA = 106.10, P<0.001) and soleus muscles (Chi2ANOVA= 97.593, P<0.001) was ocumented in group C.Conclusions. The application of the experimental stimulus in the form of sensorimotor training revealed that they soleus and tibialis anterior muscles possess the highest sensitivity to the type of the surface, thus confirming their significant role in maintaining stable posture.
Authors and Affiliations
Zuzanna Maćkowiak, Wiesław Osiński
Keywords
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