Change in Lower Extremity Muscle Activity with Visual and Noises During Walking.

Background/Objectives: In this study, four conditions of visual and noises were examined to determine the inferior limb muscle activity after walking for 10 minutes on a treadmill. Method/Statistical Analysis: Nine males and nine females, who agreed to participate in the study, were recruited. Participants were asked to walk on a treadmill for 10 minutes on each of the four conditions (a), (b), (c), and (d) depending on visual acuity and noise. Electromyograph was used to measure and compare muscle activity. Findings: There was no significant difference in biceps femoris muscle(p>.05). The comparison of the tibialis anterior muscle resulted in a significant difference between the conditions a-c, a-d, b-c and b-d (p<.05). This indicates that conditions in those visually impaired became more vital in comparison to those that were not visually impaired. The muscle activation by condition was d>c>b>a, followed by de-conditioned vision and dB was the highest when it was higher 90. The comparison of the lateral gastrocnemius muscle resulted in a significant difference between the a-c, b-c and b-d conditions (p<.05).This indicates that conditions without vision have become more vital than those with vision. The muscle activation by condition was d>c>b>a, followed by de-conditioned vision and dB was the highest when it was > 90. The comparison of the medial gastrocnemius muscle showed that not all four conditions differed significantly (p>.05). Improvements/Applications: There was significant difference in muscle activity between TA, LGM than when vision was blocked, that the muscle activity has improved when walking over 90 dB than 60 dB. [ABSTRACT FROM AUTHOR]

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